L15-6-141-10 Performance Intercooler

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Please reference the installation instructions for the intake system you have installed in your Civic

For 27WON Cold Air Intake please reference these instructions: https://store.27won.com/support/instruct...

Remove intake system from the vehicle

The prototype 27WON Turbo Inlet Pipe is installed on this vehicle, but does not affect the installation of the Front Mount Intercooler & Piping Upgrade

Remove the eleven (11) push clips that attach the radiator cooling panel to the vehicle using a flathead screwdriver or push clip removal tool

Remove the upper radiator panel from the vehicle

Starting on the driver's side, remove the four (4) push clips that connect the hood weather stripping to the bumper using a flathead screwdriver or trim removal tool

There are three small push clips, one medium push clip, and one large push clip. Note their positions for reinstallation

The small push clips can be difficult to remove with just a screwdriver. We recommend an interior trim removal tools used as shown in image 3

Remove the similar five clips on the passenger side of the vehicle

Remove the hood weather stripping and set it aside

Raise the vehicle and support with jackstands in the OE recommended locations

Look into the driver's side fender, in front of the front tire. Remove the two (2) phillips head screws that attach the bumper to the fender liner

The screws can be difficult to remove due to the tire being in the way. You can turn the wheel or use a short shank screwdriver

Remove the similar screws on the passenger side of the vehicle

Use 10mm socket & ratchet to remove the two (2) bolts shown in red circles

Use a flathead screwdriver to remove the seven (7) plastic push-clips

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

Now is a good time to apply tape to protect your paint from scratches during bumper removal and install

Apply masking or painters tape around the seams where the bumper meets the body of the car

Using a small screwdriver, push down on the two tabs to release the upper headlight trim from the headlight on the driver's side

These tabs do not require very much pressure and can break if too much pressure is used. Pull outward slighly on the trim and you will feel the "pop" as each clip releases

The upper headlight trim will not be removed, it will only move outward as shown in image 2

Repeat these steps on the passenger side

Starting at the corner of the bumper, pull outward until the corner pops free from the fender

The first time this is done can require a decent amount of force

Keep pulling outward on the bumper and use a plastic interior trim tool to release the bumper from the three retaining clips by pushing on the retaining clips

The second image shows what you are looking for to push on. Take your time and take care to not damage the vehicle

Repeat these steps on the passenger side

Moving along the headlight, keep pulling outward slightly

Using a plastic interior trim removal tool, lift up the two tabs to release them

The second image shows what you are looking for to lift upwards. Take your time and take care to not damage the vehicle

This side of the bumper will now be free from the vehicle. We recommend having a friend hold this side of the bumper while the other side is completed

Repeat these steps on the passenger side

The bumper will now only be held on by the fog light wiring

Pull the bumper forward and locate the wiring going to the fog light on the driver's side

Reach between the bumper and the rest of the vehicle. Unplug the fog light by squeezing the top and bottom of the plug

Repeat the prior two steps to unplug the passenger side fog light

Remove the front bumper from the vehicle and place out of the way where it cannot get scratched or damaged

NOTE: the aluminum ports in the intercooler were added by 27WON for intercooler testing & validation. This will NOT be present on your vehicle

Remove the two (2) nuts using a 10mm socket & ratchet

Remove the two (2) bolts using a 10mm socket & ratchet

Remove the OEM lower hot pipe section from the vehicle

NOTE: the metal pipe section with brass plugs was added by 27WON for intercooler testing & validation. This will NOT be present on your vehicle

Loosen the band clamp holding the rubber hose to the turbo inlet pipe. Use a 10mm socket, ratchet & extension

Loosen the bolt holding the OEM hot pipe to the chassis. Use a 10mm socket, ratchet & extension

Slide the rubber hose off the turbo inlet pipe then rotate and bend out of the engine bay

With the rubber hose up and out of the engine bay, remove the entire hot pipe section from the vehicle

Remove the black metal bracket that supports the OEM hot pipe. Use a 10mm wrench

Remove black bracket

This bracket and bolt are not reused

Locate area of the cold pipe highlighted

Un-clip the wiring from the temperature sensor

Un-clip the wiring from the MAP sensor

Remove the green wiring loom clip form the cold pipe bracket with needle nose pliers

Loosen the spring clamp on the rubber hose using needle nose pliers then pull the hose off the cold pipe

Remove the two (2) bolts holding the cold pipe in place. Use a 10mm socket, ratchet, & extension

All parts shown disconnected

Loosen the band clamp with a flathead or 8mm socked and ratchet

Loosen the band clamp with a flathead or 8mm socked and ratchet

Slide the rubber hose off the bottom end of the cold pipe

Slide the cold pipe out of the throttle body hose

Remove the OEM cold pipe from the engine bay at set aside, the sensors will need to be transferred to the 27WON cold pipe in future steps

NOTE: the aluminum ports in the intercooler were added by 27WON for intercooler testing & validation. This will NOT be present on your vehicle

Remove the two (2) bolts using a 10mm socket & ratchet

Remove the OEM cold pipe lower section from the vehicle through the engine bay

Loosen the band clamp with a flathead or 8mm socked and ratchet

Slide the rubber hose off the throttle boddy

Remove the throttle body hose from the engine bay

Use a flathead screwdriver to remove the two (2) push clips

Remove the 12mm bolt from the OEM horn on the passenger side of the vehicle using a 12mm socket and ratchet

This helps you gain access to the bolt in the next step and with installation of the 27WON intercooler

Remove the 10mm bolt from the OEM hot side mounting bracket on the passenger side of the vehicle using a 10mm socket and ratchet

Lift the bracket free from the vehicle

Remove the 10mm bolt from the OEM cold side mounting bracket on the driver's side of the vehicle using a 10mm socket and ratchet

Lift the bracket free from the vehicle

Lean the intercooler forward and lift out of the pockets it is sitting in

The OEM intercooler shrouds must be trimmed to fit the much larger 27WON intercooler

OEM Shroud shown with cut already

Cut along the orange line, this is flush with the underside of the crashbar

These are support ribs on the outer face of the shroud, you'll be cutting these

The section shown with the red arrow will fall away and is discarded after trimming

The remaining shroud will sit on top of the 27WON intercooler slightly. This is intentional to force good airflow through the intercooler and radiator

The OEM intercooler shrouds must be trimmed to fit the much larger 27WON intercooler

Cut along the orange line, this is flush with the underside of the crashbar

The section shown with the red arrow will fall away and is discarded after trimming

The remaining shroud will sit on top of the 27WON intercooler slightly. This is intentional to force good airflow through the intercooler and radiator

Provided foam seal already cut to length

27WON Intercooler

The top plate of the intercooler protrudes outward approximately 1/4 inch for the seal to attach to

Place the seal onto the edge of the intercooler as shown

Center left and right on the intercooler

You want the round portion of the weatherstripping facing upwards to seal against the OEM crashbar to ensure good airflow through the intercooler

Remove the two (2) OEM rubber mounts from the bottom of the intercooler

Install the rubber mounts onto the bottom mounting pegs of the 27WON intercooler as shown

The rubber mounts will fit into the mounting pockets shown with the red arrows

NOTE: the ports in the intercooler were added by 27WON for intercooler testing & validation. This will NOT be present on your purchased intercooler

We highly recommend a friend to help support the intercooler in this process, but the instructions are setup so one person can complete the install

Holding the intercooler at an angle as shown, place the rubber mounts into the pockets

Verify the rubber mount is fulled seated in the pocket

Place the OEM bracket over the top peg and align for the bolt

Install the 10mm bolt. Torque to 10-12 lb-ft

NOTE: the ports in the intercooler were added by 27WON for intercooler testing & validation. This will NOT be present on your purchased intercooler

Verify the rubber mount is fulled seated in the pocket

Place the OEM bracket over the top peg and align for the bolt

Install the 10mm bolt. Torque to 10-12 lb-ft

Install the 12mm bolt holding the horn. Torque to 10-12 lb-ft

Verify the seal is not completely crushed into the crashbar. It should have a small gap to slight press against the crashbar

The intercooler will stay in place with both brackets installed

Remove the two (2) bolts holding the sensors using an 8mm socket and ratchet

Pull the temperature sensor from the OEM cold pipe and press into the 27WON cold pipe in the port shown

Pull the MAP sensor from the OEM cold pipe and press into the 27WON cold pipe in the port shown

You can apply a VERY light layer of engine oil on the sensor o-rings to improve install

Using an 8mm socket and torque wrench, torque each to 3-5 lb-ft

Place the silicone coupler over the intercooler outlet as shown

Silicone orientation should match close to shown, but will be adjusted once the cold pipe is installed

Slide the coupler over the intercooler outlet until it stops

Silicone coupler may be touching the radiator core support slightly, this is ok

Place a provided 67-75mm T-Bolt clamp onto the throttle body silicone as shown

Throttle body side of coupler

Cold pipe side of coupler

Place the throttle body silicone into the engine bay

Slide onto the throttle body

Precise fitment and clamping will be completed after the cold pipe is installed

Place a 79-87mm T-Bolt clamp onto the throttle body silicone. Position the nut on the driver side facing up as shown for easy access

Place a 79-87mm T-Bolt clamp onto the cold side IC outlet silicone. Position the nut on the rear side facing up as shown for easy access

Locate a 67-75mm T-Bolt clamp and remove the nut from the threaded rod

Pull the threaded rod out of the coupling so the clamp and expand open as shown

Place the 67-75mm T-Bolt clamp around the installed cold side IC outlet silicone as shown

Thread the nut back onto the rod so you do not loose it

Precise fitment and clamping will be completed after the cold pipe is installed

Place the curved end of the 27WON cold pipe into the open space in the engine bay

Rotate the cold pipe so the other end goes under the wiring harness towards the throttle body silicone

While holding the throttle body silicone, press the cold pipe into the silicone coupler as shown

While holding the cold side IC outlet silicone, press the cold pipe into the silicone coupler as shown

Adjust the cold pipe orientation and fitment in the silicone couplers so the holes in the mounting bracket align with the thread holes on the engine

Install the provided M6x1.0x20mm flange bolts through the 27WON cold pipe mounting bracket into the engine

Tighten the bolts to snug, but you can still adjust the cold pipe slightly

Slide the cold pipe towards the engine until you have a little more than a credit cards worth of gap between the cold pipe and the coolant hosing and hose clamp

You do not want the cold pipe touching. Noise and damage will occur

Verify there is a small amount of clearance between the cold pipe and fan shroud

With cold pipe positioned, torque the two (2) mounting bolts to 7-8 lb-ft

Adjust the silicone position and verify the silicone is fully pressed onto the cold pipe

Place the T-Bolt clamp as shown and tighten with a 10mm socket and ratchet until the silicone bulges slightly

Remove the nut from the threaded rod

Insert the threaded rod back through the clamp coupling

Place the T-Bolt clamp as shown and tighten with a 10mm socket and ratchet until the silicone bulges slightly

Adjust the silicone position and verify the silicone is fully pressed onto the throttle body

Place the T-Bolt clamp as shown and tighten with a 10mm socket and ratchet until the silicone bulges slightly

Adjust the silicone position and verify the silicone is fully pressed onto the cold pipe

Place the T-Bolt clamp as shown and tighten with a 10mm socket and ratchet until the silicone bulges slightly

Connect the temperature sensor

Connect the MAP sensor

Press the rubber hose onto the barb fitting and use needle nose pliers to position the spring clamp over the hose where the barb is pressed in

Press the green wire loom clip into the square hole in the mounting bracket

NOTE: Steps 39, 40, & 41 show how to correctly orientate the Hot Side Turbo Outlet Silicone and Hot Side Pipe with the T-Bolt Clamp

The reason for this is to make the installation of the T-Bolt clamp at this location much easier by aligning and tighten outside of the car instead in a difficult location in the car

The T-Bolt clamp location will end up here, in a difficult to reach and tighten location

The orientation of the T-Bolt clamp is important, if orientated incorrectly the T-Bolt clamp will rub on other components causing noise and damage

Please proceed to next step before assembling hot side piping

Install the turbo outlet silicone onto the hot side pipe as shown

Only one end of the silicone will fit

The "more straight" end of the hot side pipe is used

Route the assembled silicone and pipe up through the fender opening that the OEM hot pipe was routed through

Press the silicone onto the compressor outlet of the turbo inlet pipe

You may notice that the alignment of the hot side pipe is "off". That's fine, it will be corrected in the next step

Note the orientation of the W logo, this should match the image. Only one end of the hot side IC inlet silicone will fit onto the intercooler

Install the hot side IC inlet silicone onto the hot side pipe

Install the hot side IC inlet silicone onto the intercooler

Twist the hot side pipe and hot side IC inlet silicone until you find good alignment between both pipe and the intercooler

The "designed" position will be come obvious as you start adjusting because the parts will find a spot where they seem to fit correctly

Verify there is approximately 3/4 inch of clearance to the horn

When the pipe and silicone is positioned correctly, the pipe should be able to move side to side approximately 1/2 inch without contacting other components. This is needed for normal engine movement

Verify the turbo outlet silicone is still pressed onto the turbo inlet pipe and the hot side pipe correctly

In this process try not to disrupt the assembly between the hot side pipe and turbo outlet silicone. You want to maintain the alignment

Remove the hot side IC inlet silicone without disturbing pipe on the left side

Pull the turbo outlet silicone off the turbo inlet pipe without disturbing interface in yellow circle

Route the assembled hot side pipe and turbo outlet silicone down and out of the vehicle

Install a 63-71mm T-Bolt clamp over the pipe to silicone interface as shown

Orientate the T-bolt clamp threaded rod angle to approximately match the image shown

Tighten the T-bolt clamp with a 10mm socket and ratchet until the silicone bulges slightly

Again, route the assembled silicone and pipe up through the fender opening that the OEM hot pipe was routed through

Install a 51-69mm T-Bolt clamp on the turbo outlet silicone as shown

Press the silicone onto the turbo inlet pipe as shown

Place the T-Bolt clamp as shown and tighten with a 10mm socket and ratchet until the silicone bulges slightly

Verify the threaded rod of the T-Bolt clamp installed in the previous step has approximately 1/2 inch clearance to the vehicle chassis

Adjusting this T-Bolt while installed in the vehicle is difficult

Place a provided 63-71mm T-Bolt clamp onto the hot side IC inlet silicone as shown

Place a provided 67-75mm T-Bolt clamp onto the hot side IC inlet silicone as shown

Install hot side IC silicone onto the hot side pipe and intercooler as shown

Twist the silicone to get correct fitment

Verify there is approximately 3/4 inch of clearance to the horn before the clamp is positioned

Place the T-Bolt clamp as shown and tighten with a 10mm socket and ratchet until the silicone bulges slightly

We strongly recommend using a friend to help you with bumper reinstall. This makes it much easier to prevent damage to the paint of the vehicle

Lift the bumper close to the front of the vehicle

Plug in fog lights on both sides of the car by reaching between the bumper and rest of the vehicle as you did in step 10. The plugs will click audibly when fully plugged in

Start by lifting the bottom edge of the bumper into position first

Then lift the top of the bumper upwards and inwards to place it on top of the upper bumper support

Upper bumper support labeled with yellow arrows

The corners of the bumper can easily get caught during this process. Ensure they do not get caught to prevent damaging your paint

Starting on the driver's side, work your way from the inner corner (left in image) of the headlight to the corner of the bumper and connect the five clips removed in steps 8 and 9

Repeat for the other side of the vehicle

It is common for the fender liner to end up outside of the rear edge of the bumper

Push the fender liner so all parts of it end up inside the rear edge of the bumper/front lip

You can then press the corner of the bumper into the clip below the marker light

Repeat this step on the other side of the vehicle

For clarity, the image of the underside of the car was split into two images. Both images show the center push clips

From the underside of the front bumper, reinstall:

Use 10mm socket & ratchet to install the two (2) bolts shown in red circles

Seven large push clips

Two 5mm Allen bolts using a 5mm Allen key or socket. Tighten until snug

Secure the bumper to the fender liner using the two (2) OEM Phillips head screws removed in step 4. Tighten until snug using a Phillips screwdriver

Position the upper headlight trim just above the headlight and gently push it inward to connect the two clips to the headlight

Often these clips will connect themselves when the bumper is reinstalled. If not, there will be an audible click as they are positioned

Repeat on the other side of the vehicle

Replace the OEM hood weather stripping on top of the top edge of the bumper and secure with:

One medium push clip

Three small push clips

Repeat on the other side of the vehicle

Reinstall the upper radiator panel and secure with 11 push clips removed in step 3

Please reference the installation instructions for the intake system you have installed in your Civic

Reinstall your intake system

Verify clearance to the 27WON Cold Pipe during your installation

Fitment for the 27WON Intercooler & Piping Upgrade has been verified for 27WON intake systems. Call us to verify fitment for OEM and other aftermarket intakes

Check for boost leaks

Check for boost leaks at all intercooler and piping connections

Once the car is up to temperature (170degF), complete a drive in which you can get the engine into high boost

If a whistling sound is heard, you may have a small boost leak, check and tighten the connections for the intercooler and piping

Tuning:

It is highly recommended to have the vehicle tuning revised and updated for the new intercooler and piping kit although it is not required

This completes the installation of your 27WON Performance L15 Intercooler & Piping Kit

We hope you were impressed with your 27WON experience and love your new Intercooler 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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