Introduction
In this installation guide we have provided step by step instructions to remove the OEM downpipe and install the 27WON Performance downpipe.
Advisory:
- Non-Catted Downpipes are strictly intended for racing use only.
- Working under the vehicle requires a safe and sturdy location for the vehicle to sit on jackstands.
- The exhaust piping, turbocharger, and cooling system will be hot after recent vehicle operation. Allow the vehicle to cool or use a fan to cool the exhaust components before working on the vehicle.
Tools
- Silicone Lubricant Spray
- WD-40
- Shop Towels/Rags
- Jack Stand × 2
- Hydraulic Jack
- Flat Head Screwdriver - Large
- Phillips Screwdriver - #2
- Tongue and Groove Adjustable Pliers
- Needle Nose Pliers
- Socket 5.5mm
- Socket, 10mm
- Socket 12mm
- Socket 14mm
- Ratchet Wrench Extension - Short
- Ratchet Wrench Extension - Long
- Ratchet Wrench
- Wrench, 10mm
- Wrench, 12mm
- Wrench, 14mm
- Wrench, 19mm
- 5mm Allen Wrench
- Torque Wrench
- O2/Oxygen Sensor Socket
- Magnet on a Stick
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First and foremost; THANK YOU for becoming a part of the 27WON Family. We hope to REDEFINE your experience of the aftermarket with the highest level Parts, Customer Service, Packaging, & Support
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If you are installing a 27WON Front-Pipe along with the Downpipe, please see the Front-Pipe Instructions Here: http://store.27won.com/support/instructi...
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Defouler & Non-Catted Downpipes are strictly intended for racing use only. Installation and use are at the customers own risk
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Heat shield fitment may be different outside North America. Some modification of heat shield may be required for proper fitment.
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Locate the engine skidtray to gain access to the downpipe and front-pipe
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Use 5mm Allen to remove the two (2) bolts shown in green circles
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Use 10mm socket & ratchet to remove the seven (7) bolts shown in red circles
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Use a flathead screwdriver to remove the seventeen (17) plastic push-clips. Orange arrows identify the push-clips described in the next step (3)
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Use large flat head screw driver to remove push-clips on each side of skidtray
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Disconnect the wiring harness from the MAF Sensor
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Remove the wire cover from the airbox
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Use needle nose pliers to pinch the clips then pull the cover off the airbox
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Use a 10mm socket, extension & ratchet to loosen the two (2) 10mm bolts
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You can leave the bolts loose in position during airbox removal
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Use a 5.5mm socket to loosen the hose clamp
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A small phillips screwdriver can be used, but is not recommend because the hose clamp head strips easily
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Pull the hose off the turbo inlet pipe in the direction of the arrow
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With the hose loose, remove the entire airbox from the engine bay
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The result will look as shown in the second image
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Disconnect the O2 sensor wire as shown with red arrow
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Use small pliers to remove the purple clip from the bracket
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Pinch the back side of the purple clip and push through the bracket
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Verify that the bracket and radiator hose are not hot. If hot allow the vehicle to cool before proceeding
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Moving the radiator hose allows improved clearance for downpipe removal
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Use a 10mm socket & ratchet to remove the two (2) 10mm bolts holding the lower radiator hose in place
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With the bolts removed, move the radiator hose upward and forward
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Apply a small amount of silicone spray to the end of the hanger rod (red arrow)
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Use the tongue and groove pliers as shown to remove the rubber hanger
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Use a 14mm socket and ratchet to remove the three OE nuts, these nuts/studs can be set aside as you will use the provided three (3) 15mm stud/nuts when reinstalling the downpipe
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It is possible that the stud will thread out of the downpipe flange. This is not an issue. The stud can be threaded back into the flange like a bolt
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Verify that the brackets and coolant hose are not hot. If hot allow the vehicle to cool before proceeding
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Use a 14mm socket & ratchet or wrench to remove the four (4) 14mm bolts as shown in red circles in two images
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Remove the brackets from the vehicle
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Locate the secondary O2 sensor on the downpipe
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Locate the specialty socket - 22mm or 7/8" O2 sensor socket
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Use the ratchet wrench in the specialty socket to remove the O2 sensor
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Going forward we will reference the black plastic pipe connected to the turbo as the "Turbo Inlet Pipe (TIP)"
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The following components are identified for clarity in the following steps
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EVAP Bleed Air
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Valve Cover Breather Hose
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TIP Mounting Points
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Waste Gate Actuator (WGA) Wiring Connection
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By-Pass Valve (BPV) Hoses
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Use a 10mm socket & ratchet to remove the two (2) 10mm bolts
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Pull the EVAP bleed air out of the TIP and set to the side
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Use pliers to loosen the spring clamps. Slide the clamps towards the center of the hose
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Pull the hose off the valve cover first
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Pull the hose off the TIP second
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Disconnect the wiring from the Waste Gate Actuator (WGA)
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Locate the wiring loom
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Press down on the small tab and pull the wiring loom from the bracket in the direction of the yellow arrow
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Move the wiring harness towards the rear of the car out of the way
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Use pliers to loosen the spring clamps. Slide the spring clamps with red circles towards the center of the hose
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Pull the BPV hoses off the metal tubes in the direction of the orange arrows
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Use pliers to loosen the spring clamp. Slide the clamp towards the center of the of the hose
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Do not remove the hose yet
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Pop the hose out of the plastic clip
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Pull the hose off the plastic "T". Move the hose towards the front of the car out of the way
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Some coolant may spill from the hose and "T" connection
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Use a 10mm socket & ratchet to remove the bolt holding the "T" connection
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Use a 10mm socket & ratchet or Phillips screwdriver to loosen the worm-gear clamp
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Pull the hose off the TIP in the direction of the arrow
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Remove the clamp from the hose so it does not get lost in the engine bay
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Bend the hose towards the rear of the car. Stuff it into the fender liner out of the way
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Use a 10mm socket & ratchet to remove the two (2) TIP mounting bolts
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The next process is to remove the Turbo Inlet Pipe (TIP) from the vehicle.
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We will first identify the hardware location and how to remove without losing the hardware in the engine bay
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Second, we will show step by step images of physically removing the TIP for PDF users and a quick video for mobile users
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Locating the mounting hardware on the TIP can be difficult. Please see the second image for clear identification
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The hardware circled in red are bolts. The hardware circled in orange is a nut on a stud
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Use a 12mm socket, extension & ratchet to loosen the three (3) bolts
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Use a 12mm socket, extension & ratchet to loosen one (1) nut
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With the bolts loose, but not removed, use the magnet on a stick to remove the bolts from the TIP
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Mobile Users proceed to Step 24 for video tutorial
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Pull the oil dip stick out a couple inches and flex out of way
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Move the TIP towards the passenger side of the vehicle past the oil dip stick
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Reinstall the oil dip stick
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Move the TIP further towards the passenger side of the vehicle and begin to rotate the top of the TIP towards the front of the vehicle
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Continue the rotation of the TIP while moving the TIP up and out of the engine bay
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Pull the oil dip stick out a couple inches and flex out of way
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Move the TIP towards the passenger side of the vehicle past the oil dip stick
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Reinstall the oil dip stick
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Move the TIP further towards the passenger side of the vehicle and begin to rotate the top top of the TIP towards the front of the vehicle
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Continue the rotation of the TIP while moving the TIP up and out of the engine bay
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Verify that the heat shield is not hot. If hot allow the vehicle to cool before proceeding
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Use a 12mm wrench to remove the three (3) 12mm bolts
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Remove the heat shield from the engine bay
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Pull the wire out of the bracket as shown with the red arrow
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Disconnect the wiring circled in orange
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Press a tab on the back of the wiring connection and pull down off the bracket as shown in second image
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Move the primary O2 sensor wire to the side out of the way
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Locate the wiring bracket to the driver's side of the turbo
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Use a 10mm socket & ratchet to remove the two (2) 10mm bolts
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Remove the bracket from the vehicle
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It may be necessary to spray the studs/bolts with a penetrating lubricant before removal. Apply lubricant if needed and let sit for a few minutes then attempt removal
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Use a 14mm socket & ratchet to remove the two (2) nuts and two (2) bolts
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Move the downpipe off the studs towards the driver's side
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Lower the downpipe straight down through the opening below
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Use a 10mm socket & ratchet to remove the four (4) bolts
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Use the specialty O2 sensor socket to install the secondary O2 sensor into the defouler. Torque to 30-33 ft-lbs
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Locate the four (4) provided 10mm flange bolts on the downpipe
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Use a 10mm socket and torque wrench to install the provided four (4) 10mm flange bolts and heat shield. Torque to 12-15 ft-lbs
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In the situation that an OE stud or nut was damaged during downpipe removal, you may use a M10x1.25 stud or nut for replacement
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Use a 14mm socket & torque wrench to install the four (4) OE studs/nuts. Torque to 42-48 ft-lbs
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Use a 12mm wrench to install the three (3) 10mm bolts and heat shield. Torque to 15-19 ft-lbs
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Some aftermarket downpipes may not have the provision for this heat shield
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Install the bracket and hand tighten one (1) 10mm bolt into the engine shown with the red circle
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The wiring bracket will need to be bent up slightly to clear the downpipe heat shield.
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Bend the wiring bracket along the orange line in the direction of the yellow arrow until there is clearance
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Clearance will require the bracket to be bent upward approximately 10mm
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Use a 10mm socket & torque wrench to install the two (2) 10mm bolts and bracket. Torque to 8-10 ft-lbs
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After tightening the bolts, verify there is a small clearance gap between the bracket and heat shield
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Install the secondary O2 sensor wiring harness onto the bracket
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Install the primary O2 sensor wiring harness onto the bracket
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Install the primary wire into the metal clip
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Connect the primary sensor to the wiring harness as indicated by orange arrow
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Installation of the TIP follows the same process for removal in reverse
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Lower the TIP into the engine bay with the TIP rotated towards the front of the car
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Rotate and lower the TIP into the engine bay then move it towards the driver's side of the engine bay
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Pull the oil dip stick out a couple inches and flex out of way
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Move the TIP further to the driver's side while sliding the TIP over the stud in the compressor housing
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Reinstall the oil dip stick
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With the TIP loosely in position on the turbo, we will begin the most frustrating part of the entire installation.
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Using the Magnet on a Stick we can loosely thread the nut onto the stud and the bolts into the compressor housing without the risk of losing the hardware in the engine bay
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An installed TIP is shown out of the car for clarity
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The three (3) red circles show the locations of the 12mm bolts
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The orange circle shows the location of the 12mm nut and stud
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Use the magnet on a stick tech tip shown in Step 37 to first loosely install the bolts and nut
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Tighten the hardware and torque to 15-19 ft-lbs
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Use a 10mm socket & torque wrench to install the two (2) TIP mounting bolts. Torque to 8-10 ft-lbs
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Pull the hose out and reinstall the band clamp in the same orientation it came off
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Push the hose onto the TIP in the direction of the arrow
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Use a 10mm socket & ratchet or Phillips screwdriver to tighten the worm-gear clamp until snug
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Use a 10mm socket to install the bolt holding the "T" connection. Torque to 8-10 ft-lbs
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Pop the hose into the plastic clip
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Push the hose onto the plastic "T". Use pliers to install the spring clamp at the end of the coolant hose around the "T" connection
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Push the BPV hoses onto the metal tubes in the direction of the red arrows
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Use pliers to install the spring clamps onto the end of the hoses around the metal pipe
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Install the wiring harness back onto the bracket
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Reconnect the wiring harness to the WGA
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Push the hose onto the TIP first, following the red arrow.
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Push the hose onto the valve cover second
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Use pliers to install the spring clamps onto the end of the hose
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Use a 10mm socket & torque wrench to install the two (2) 10mm bolts. Torque to 8-10 ft-lbs
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Move the radiator hose back into the correct position so the bolt holes and bracket holes align
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Use a 10mm socket & torque wrench to install the two (2) 10mm bolts holding the lower radiator hose in place. Torque to 8-10 ft-lbs
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Use a 14mm socket or wrench to install the four (4) 14mm bolts and brackets. Torque to 38-42 ft-lbs
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Use of the lower mounting brackets are necessary for the proper support of the downpipe
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Failure to install these brackets can result in failure of downpipe
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Locate the three (3) provided M10 flange nuts and the three (3) provided M10 studs
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Use a 15mm socket & torque wrench to install the three (3) 15mm nuts/studs provided. Torque to 30-40 ft-lbs
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Please note that the photo of the part installed on the car shows OEM hardware being used but this is not the case with current production parts.
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Apply a small amount of silicone spray to the end of the hanger rod
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Push the rubber hanger onto the hanger rod
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Connect the O2 sensor to the wiring harness
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Install the purple clip into the wiring bracket
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Lower the airbox assembly into the engine bay
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Install the induction hose onto the TIP
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Use a 10mm socket and torque wrench to install the two (2) 10mm bolts that hold the airbox assembly. Torque to 3-4 ft-lbs
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Use a 5.5mm socket or phillps screwdriver to tighten the band clamp until snug
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Install the wiring harness into the airbox
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Reconnect the MAF sensor wiring
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Install the seventeen (17) plastic push-clips. Orange arrows identify the push-clips described in the next step
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Use 10mm socket & torque wrench to install the seven (7) bolts shown in red circles. Torque to 8-10 ft-lbs
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Use 5mm Allen and torque wrench to install the two (2) bolts shown in green circles. Torque to 8-10 ft-lbs
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Install the remaning six (6) push-clips on each side of the skidtray
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Defouler & Non-Catted Downpipes are strictly intended for racing use only. Installation and use are at the customers own risk
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Some smell may be present on the first start as any residue on the downpipe burns off. This is normal and will not happen after the 1st heat cycle.
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To get the best performance from your Performance Downpipe, we highly recommend a custom tune.
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A custom tune for your specific vehicle with your specific modifications will provide the best performance for your Civic and the location you live in
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This completes the installation of your 27WON Performance Downpipe
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If you are installing a 27WON Front-Pipe along with the Downpipe, please see the Front-Pipe Instructions Here: http://store.27won.com/support/instructi...
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We hope you were impressed with your 27WON experience and love your new Downpipe for years to come. Email us at sales@27won.com or call us at 571-271-0271 with any questions or concerns
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Please Leave a review here: https://store.27won.com/10th-gen-civic-p...
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