L15-6-209-10 10th Gen Downpipe

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

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...

Defouler & Non-Catted Downpipes are strictly intended for racing use only. Installation and use are at the customers own risk

Heat shield fitment may be different outside North America. Some modification of heat shield may be required for proper fitment.

Locate the engine skidtray to gain access to the downpipe and front-pipe

Use 5mm Allen to remove the two (2) bolts shown in green circles

Use 10mm socket & ratchet to remove the seven (7) bolts shown in red circles

Use a flathead screwdriver to remove the seventeen (17) plastic push-clips. Orange arrows identify the push-clips described in the next step (3)

Use large flat head screw driver to remove push-clips on each side of skidtray

Disconnect the wiring harness from the MAF Sensor

Remove the wire cover from the airbox

Use needle nose pliers to pinch the clips then pull the cover off the airbox

Use a 10mm socket, extension & ratchet to loosen the two (2) 10mm bolts

You can leave the bolts loose in position during airbox removal

Use a 5.5mm socket to loosen the hose clamp

A small phillips screwdriver can be used, but is not recommend because the hose clamp head strips easily

Pull the hose off the turbo inlet pipe in the direction of the arrow

With the hose loose, remove the entire airbox from the engine bay

The result will look as shown in the second image

Disconnect the O2 sensor wire as shown with red arrow

Use small pliers to remove the purple clip from the bracket

Pinch the back side of the purple clip and push through the bracket

Verify that the bracket and radiator hose are not hot. If hot allow the vehicle to cool before proceeding

Moving the radiator hose allows improved clearance for downpipe removal

Use a 10mm socket & ratchet to remove the two (2) 10mm bolts holding the lower radiator hose in place

With the bolts removed, move the radiator hose upward and forward

Apply a small amount of silicone spray to the end of the hanger rod (red arrow)

Use the tongue and groove pliers as shown to remove the rubber hanger

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

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

Verify that the brackets and coolant hose are not hot. If hot allow the vehicle to cool before proceeding

Use a 14mm socket & ratchet or wrench to remove the four (4) 14mm bolts as shown in red circles in two images

Remove the brackets from the vehicle

Locate the secondary O2 sensor on the downpipe

Locate the specialty socket - 22mm or 7/8" O2 sensor socket

Use the ratchet wrench in the specialty socket to remove the O2 sensor

Going forward we will reference the black plastic pipe connected to the turbo as the "Turbo Inlet Pipe (TIP)"

The following components are identified for clarity in the following steps

EVAP Bleed Air

Valve Cover Breather Hose

TIP Mounting Points

Waste Gate Actuator (WGA) Wiring Connection

By-Pass Valve (BPV) Hoses

Use a 10mm socket & ratchet to remove the two (2) 10mm bolts

Pull the EVAP bleed air out of the TIP and set to the side

Use pliers to loosen the spring clamps. Slide the clamps towards the center of the hose

Pull the hose off the valve cover first

Pull the hose off the TIP second

Disconnect the wiring from the Waste Gate Actuator (WGA)

Locate the wiring loom

Press down on the small tab and pull the wiring loom from the bracket in the direction of the yellow arrow

Move the wiring harness towards the rear of the car out of the way

Use pliers to loosen the spring clamps. Slide the spring clamps with red circles towards the center of the hose

Pull the BPV hoses off the metal tubes in the direction of the orange arrows

Use pliers to loosen the spring clamp. Slide the clamp towards the center of the of the hose

Do not remove the hose yet

Pop the hose out of the plastic clip

Pull the hose off the plastic "T". Move the hose towards the front of the car out of the way

Some coolant may spill from the hose and "T" connection

Use a 10mm socket & ratchet to remove the bolt holding the "T" connection

Use a 10mm socket & ratchet or Phillips screwdriver to loosen the worm-gear clamp

Pull the hose off the TIP in the direction of the arrow

Remove the clamp from the hose so it does not get lost in the engine bay

Bend the hose towards the rear of the car. Stuff it into the fender liner out of the way

Use a 10mm socket & ratchet to remove the two (2) TIP mounting bolts

The next process is to remove the Turbo Inlet Pipe (TIP) from the vehicle.

We will first identify the hardware location and how to remove without losing the hardware in the engine bay

Second, we will show step by step images of physically removing the TIP for PDF users and a quick video for mobile users

Locating the mounting hardware on the TIP can be difficult. Please see the second image for clear identification

The hardware circled in red are bolts. The hardware circled in orange is a nut on a stud

Use a 12mm socket, extension & ratchet to loosen the three (3) bolts

Use a 12mm socket, extension & ratchet to loosen one (1) nut

With the bolts loose, but not removed, use the magnet on a stick to remove the bolts from the TIP

Mobile Users proceed to Step 24 for video tutorial

Pull the oil dip stick out a couple inches and flex out of way

Move the TIP towards the passenger side of the vehicle past the oil dip stick

Reinstall the oil dip stick

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

Continue the rotation of the TIP while moving the TIP up and out of the engine bay

Pull the oil dip stick out a couple inches and flex out of way

Move the TIP towards the passenger side of the vehicle past the oil dip stick

Reinstall the oil dip stick

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

Continue the rotation of the TIP while moving the TIP up and out of the engine bay

Verify that the heat shield is not hot. If hot allow the vehicle to cool before proceeding

Use a 12mm wrench to remove the three (3) 12mm bolts

Remove the heat shield from the engine bay

Pull the wire out of the bracket as shown with the red arrow

Disconnect the wiring circled in orange

Press a tab on the back of the wiring connection and pull down off the bracket as shown in second image

Move the primary O2 sensor wire to the side out of the way

Locate the wiring bracket to the driver's side of the turbo

Use a 10mm socket & ratchet to remove the two (2) 10mm bolts

Remove the bracket from the vehicle

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

Use a 14mm socket & ratchet to remove the two (2) nuts and two (2) bolts

Move the downpipe off the studs towards the driver's side

Lower the downpipe straight down through the opening below

Use a 10mm socket & ratchet to remove the four (4) bolts

Use the specialty O2 sensor socket to install the secondary O2 sensor into the defouler. Torque to 30-33 ft-lbs

Locate the four (4) provided 10mm flange bolts on the downpipe

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

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

Use a 14mm socket & torque wrench to install the four (4) OE studs/nuts. Torque to 42-48 ft-lbs

Use a 12mm wrench to install the three (3) 10mm bolts and heat shield. Torque to 15-19 ft-lbs

Some aftermarket downpipes may not have the provision for this heat shield

Install the bracket and hand tighten one (1) 10mm bolt into the engine shown with the red circle

The wiring bracket will need to be bent up slightly to clear the downpipe heat shield.

Bend the wiring bracket along the orange line in the direction of the yellow arrow until there is clearance

Clearance will require the bracket to be bent upward approximately 10mm

Use a 10mm socket & torque wrench to install the two (2) 10mm bolts and bracket. Torque to 8-10 ft-lbs

After tightening the bolts, verify there is a small clearance gap between the bracket and heat shield

Install the secondary O2 sensor wiring harness onto the bracket

Install the primary O2 sensor wiring harness onto the bracket

Install the primary wire into the metal clip

Connect the primary sensor to the wiring harness as indicated by orange arrow

Installation of the TIP follows the same process for removal in reverse

Lower the TIP into the engine bay with the TIP rotated towards the front of the car

Rotate and lower the TIP into the engine bay then move it towards the driver's side of the engine bay

Pull the oil dip stick out a couple inches and flex out of way

Move the TIP further to the driver's side while sliding the TIP over the stud in the compressor housing

Reinstall the oil dip stick

With the TIP loosely in position on the turbo, we will begin the most frustrating part of the entire installation.

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

An installed TIP is shown out of the car for clarity

The three (3) red circles show the locations of the 12mm bolts

The orange circle shows the location of the 12mm nut and stud

Use the magnet on a stick tech tip shown in Step 37 to first loosely install the bolts and nut

Tighten the hardware and torque to 15-19 ft-lbs

Use a 10mm socket & torque wrench to install the two (2) TIP mounting bolts. Torque to 8-10 ft-lbs

Pull the hose out and reinstall the band clamp in the same orientation it came off

Push the hose onto the TIP in the direction of the arrow

Use a 10mm socket & ratchet or Phillips screwdriver to tighten the worm-gear clamp until snug

Use a 10mm socket to install the bolt holding the "T" connection. Torque to 8-10 ft-lbs

Pop the hose into the plastic clip

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

Push the BPV hoses onto the metal tubes in the direction of the red arrows

Use pliers to install the spring clamps onto the end of the hoses around the metal pipe

Install the wiring harness back onto the bracket

Reconnect the wiring harness to the WGA

Push the hose onto the TIP first, following the red arrow.

Push the hose onto the valve cover second

Use pliers to install the spring clamps onto the end of the hose

Use a 10mm socket & torque wrench to install the two (2) 10mm bolts. Torque to 8-10 ft-lbs

Move the radiator hose back into the correct position so the bolt holes and bracket holes align

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

Use a 14mm socket or wrench to install the four (4) 14mm bolts and brackets. Torque to 38-42 ft-lbs

Use of the lower mounting brackets are necessary for the proper support of the downpipe

Failure to install these brackets can result in failure of downpipe

Locate the three (3) provided M10 flange nuts and the three (3) provided M10 studs

Use a 15mm socket & torque wrench to install the three (3) 15mm nuts/studs provided. Torque to 30-40 ft-lbs

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.

Apply a small amount of silicone spray to the end of the hanger rod

Push the rubber hanger onto the hanger rod

Connect the O2 sensor to the wiring harness

Install the purple clip into the wiring bracket

Lower the airbox assembly into the engine bay

Install the induction hose onto the TIP

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

Use a 5.5mm socket or phillps screwdriver to tighten the band clamp until snug

Install the wiring harness into the airbox

Reconnect the MAF sensor wiring

Install the seventeen (17) plastic push-clips. Orange arrows identify the push-clips described in the next step

Use 10mm socket & torque wrench to install the seven (7) bolts shown in red circles. Torque to 8-10 ft-lbs

Use 5mm Allen and torque wrench to install the two (2) bolts shown in green circles. Torque to 8-10 ft-lbs

Install the remaning six (6) push-clips on each side of the skidtray

Defouler & Non-Catted Downpipes are strictly intended for racing use only. Installation and use are at the customers own risk

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.

To get the best performance from your Performance Downpipe, we highly recommend a custom tune.

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

This completes the installation of your 27WON Performance Downpipe

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...

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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