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R2.1

Minor Versionm

by Rich Harris

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.
  1. 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
    • 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.

  2. Locate the engine skidtray to gain access to the downpipe and front-pipe
    • 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)

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

  4. Disconnect the wiring harness from the MAF Sensor Remove the wire cover from the airbox
    • 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

  5. 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 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

  6. 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
    • 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

  7. Disconnect the O2 sensor wire as shown with red arrow
    • 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

  8. 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
    • 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

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

  10. 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
    • 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

  11. 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
    • 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

  12. 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
    • 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

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

  14. 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 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

  15. Use pliers to loosen the spring clamps.  Slide the clamps towards the center of the hose Pull the hose off the valve cover first
    • 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

  16. Disconnect the wiring from the Waste Gate Actuator (WGA) Locate the wiring loom
    • 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

  17. 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 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

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

  19. 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
    • 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

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

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

  22. 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
    • 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

  23. 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
    • 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

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

  25. 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
    • 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

  26. Locate the wiring bracket to the driver's side of the turbo Use a 10mm socket & ratchet to remove the two (2) 10mm bolts
    • 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

  27. 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
    • 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

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

  29. 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
    • 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

  30. 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
    • 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

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

  32. 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.
    • 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

  33. Install the secondary O2 sensor wiring harness onto the bracket Install the primary O2 sensor wiring harness onto the bracket
    • Install the secondary O2 sensor wiring harness onto the bracket

    • Install the primary O2 sensor wiring harness onto the bracket

  34. Install the primary wire into the metal clip
    • Install the primary wire into the metal clip

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

  35. 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
    • 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

  36. 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
    • 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

  37. An installed TIP is shown out of the car for clarity The three (3) red circles show the locations of the 12mm bolts
    • 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

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

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

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

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

  42. Install the wiring harness back onto the bracket
    • Install the wiring harness back onto the bracket

    • Reconnect the wiring harness to the WGA

  43. Push the hose onto the TIP first, following the red arrow. Push the hose onto the valve cover second
    • 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

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

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

  46. 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
    • 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

  47. 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
    • 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.

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

    • Push the rubber hanger onto the hanger rod

  49. Connect the O2 sensor to the wiring harness
    • Connect the O2 sensor to the wiring harness

    • Install the purple clip into the wiring bracket

  50. Lower the airbox assembly into the engine bay
    • 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

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

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

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

  54. This completes the installation of your 27WON Performance Downpipe
    • 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

    • Please Leave a review here: https://store.27won.com/10th-gen-civic-p...

    • Share your experience using #27WON on Instagram and Facebook

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Dozuki System

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