FL5-6-142-1X Boost Tubes

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The 27WON Boost Tubes are designed with OEM like fitment and closely match overall size and routing. However, fitment with non-27WON aftermarket intakes and intercooler kits is not guaranteed

This is shown on an FL5 Type R. The process is identical on the Integra Type S

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

Locate the engine undertray to gain access to the OEM hot side boost tube and lower section of the OEM cold side boost tube

Remove the four Phillips head bolts using a Phillips screwdriver

Remove the four quarter turn screws using a large Flathead screwdriver

Remove the two Philips head screws using a Philips screwdriver

Slide the metal section rearward and remove it from the vehicle

The metal section of the undertray can be sharp. Use caution when handling it

Locate the OEM hot side boost tube. It's in the general area of the orange arrow

Loosen the clamp that connects the OEM hot side boost tube to the turbocharger using a 10mm socket and a 3/8" drive ratchet

Slide the clamp toward the center of the OEM hot side boost tube and out of the way

Loosen the clamp that attaches the OEM hot side boost tube to the intercooler using a 10mm socket and ratchet

Slide this clamp toward the center of the OEM boost tube and out of the way

Pull the OEM boost tube free from the turbocharger

Pull the OEM boost tube free from the intercooler and remove it from the vehicle

Locate the 27WON hot side boost tube

Install the two supplied 60-68mm clamps near the center of the boost tube as shown

The boost tube will go into the car in the orientation shown

Turbo side

FMIC side

Push the 27WON boost tube onto the turbocharger until flush with the stopper as shown

Push the 27WON boost tube onto the intercooler until flush with the stopper as shown

Image 1 on this page shows what we mean by "correctly positioning" the clamps. There should be a small gap between the clamp and the end of the silicone (2-4mm). This gap should be even all the way around the silicone. Use this image as a reference when tightening all supplied clamps

Correctly position the 60-68mm clamp on the turbocharger and tighten with a 10mm socket and 3/8" drive ratchet until the silicone starts to bulge slightly at the edge of the clamp

The clamp orientations shown are the easiest to access/tighten

Correctly position the 60-68mm clamp on the intercooler as shown and leave to be tightened from above later

This clamp can be tightened now, but is much easier to reach from above with a 12" extension

Locate the lower portion of the OEM cold side boost tube. It's in the general area of the orange arrow

Loosen the clamp that connects the OEM cold side boost tube to the intercooler using a 10mm socket and 3/8" drive ratchet

Slide the clamp up the tube and out of the way

Pull the OEM boost tube free from the intercooler

OE Intake removal is shown next. Skip to Step 14 and follow manufacturers instructions for aftermarket intakes

Moving back to the topside of the engine, begin removing the intake to gain access to the OEM cold side boost tube

Unplug the connector for MAF sensor by using your fingers to press down on the plastic clip and pulling the plug away from the airbox as shown

Using your finger press the two tabs shown towards the airbox, and lift on the wire loom to disconnect the loom from the airbox lid

Set the MAF sensor wire out of the way

Use a 5.5mm socket and 3/8" ratchet or a small Phillips screwdriver to loosen the two intake clamps circled in orange

Use a 5.5mm socket and 3/8" ratchet or a small Phillips screwdriver to loosen the one EVAP elbow clamp circled in yellow

Use a 3/8" drive ratchet and a 10mm socket to remove two (2) bolts that hold the intake duct in place

Using your hand pull the rubber end of the duct out of its slot in the radiator shroud

This may take a bit of force the first time it comes out

Use a 3/8" ratchet, a long extension, and a 10mm socket to remove lower intake bolt

Use a 3/8" ratchet, a long extension, and a 10mm socket to remove the upper battery bracket bolt

Locate the two positive battery cables that need to be freed from the upper airbox in order to remove the airbox

Using your fingers or a pair of needle nose pliers pinch the two battery cable clips and push them out of the airbox bracket

Only one side is shown, the other side is the same process

The airbox is still connected to the chassis with a rubber grommet and stud underneath the intake inlet in the area shown

Wiggle the inlet back and forth while lifting on the entire airbox to get it loose from the grommet as shown

Using your hand pull the accordion intake tube off of the hard plastic EVAP elbow as shown

With the intake tube now freed, pull the airbox assembly out of the engine bay

Locate the cold side boost tube

Using a 10mm socket and 3/8" drive ratchet, loosen the clamp where the OEM boost tube connects to the OEM cold pipe

Slide this clamp down the OEM boost tube

Pull the OEM boost tube free from the OEM cold pipe

Remove the OEM cold side boost tube from the engine bay

Locate the 27WON cold side boost tube

Install the two supplied 63-71mm clamps away from the ends of the silicone as shown

Position the boost tube in the orientation shown

Cold pipe end

Intercooler end

Push the 27WON boost tube onto the intercooler until flush with the stopper as shown

Push the 27WON boost tube onto the cold pipe until flush with the stopper as shown

Correctly position the 63-71mm clamp over the cold pipe and tighten with a 10mm socket and 3/8" drive ratchet until the silicone starts to bulge slightly at the edge of the clamp

Correctly position the 63-71mm clamp over the Intercooler and tighten with a 10mm socket, a 12" extension, and a 3/8" drive ratchet until the silicone starts to bulge slightly at the edge of the clamp

See Step 6 for correct clamp positioning

The clamp orientations shown are easy to access and provide clearance to airboxes and intakes

If you tightened this clamp while under the car, you can skip this step

Looking down between the radiator and turbocharger you can get a straight shot at the connection between the hot side boost tube and intercooler

Correctly position the 60-68mm clamp on the intercooler and tighten with a 10mm socket, a 12" extension, and 3/8" drive ratchet until the silicone starts to bulge slightly at the edge of the clamp

If the 12" extension does not provide enough clearance, a longer extension or a stack of multiple extensions can provide better reach

The battery, and battery tray will need to be removed for easy access to the throttle body silicone

If you have an FSTB installed it will need to be removed before proceeding

Loosen the nut on the negative battery cable with a 10mm socket and a 3/8" drive ratchet then remove the negative cable from the battery. Tuck the cable out of the way

Loosen the nut on the positive battery cable with a 10mm socket and a 3/8" drive ratchet then remove the positive cable from the battery. Tuck the cable out of the way

Loosen one of the nuts on the battery tiedown with a 10mm socket and a 3/8" drive ratchet then remove the hook and battery tiedown from the battery

With the cables and tiedown out of the way lift the battery out of the engine bay and set it to the side

Note that there may be a handle on your battery that makes removal easier

Remove the plastic battery tray from the engine bay to expose the lower metal battery tray

Use your fingers or a pair of pliers to pinch the clip circled in orange and push it out of the bracket

Use a 10mm socket, a 6" extension, and a 3/8" drive ratchet to remove the five bolts circled in yellow

With the lower battery tray free, remove it from the engine bay as shown

The cold pipe will need to be unbolted from the engine block brackets to allow the necessary movement to remove the throttle body silicone

Use a 12mm socket, a 6" extension, and a 3/8" drive ratchet to remove the two mounting bolts circled in orange

Unplug the MAP sensor by pressing down on the mounting tab, and pulling the plug towards the firewall

Use a 10mm socket, a 6" extension, and a 3/8" drive ratchet loosen the two hose clamps securing the OEM silicone

With both clamps loose, pull the cold pipe towards the drivers side of the vehicle and out of the throttle body silicone

With the cold pipe out of the way, remove the OEM silicone as shown

Loosely place the 70-78mm clamps on the 27WON silicone

This silicone is not directional, so the orientation of the silicone itself is not important

While holding the cold pipe out of the way, push the silicone over the throttle body until flush with the stopper on the throttle body

Push the cold pipe into the silicone until flush with the stopper on the cold pipe as shown

Correctly position the 70-78mm clamps on the throttle body and cold pipe, and tighten with a 10mm socket, a 6" extension, and 3/8" drive ratchet until the silicone starts to bulge slightly at the edge of the clamp

Thread the two mounting bolts into the cold pipe as shown then use a 12mm socket, a 6" extension, and a 3/8" drive ratchet to tighten them down

Plug the MAP sensor back in as shown

The lower battery bracket will need to align with the four holes circled in orange when reinstalled

Thread the four mounting bolts as shown, then use a 10mm socket, a 6" extension, and a 3/8" drive ratchet to tighten them down

Thread the wire mounting bolt through the plastic loom as shown, then use a 10mm socket, a 6" extension, and a 3/8" drive ratchet to tighten the bolt down

Press the wire mounting clip through the bracket as shown until it "clicks" into place

The plastic battery tray will slot into the hole circled in pink

Place the plastic battery tray into the engine bay in the orientation shown, the plastic alignment pin on the bottom will slot into the hole circled in the last step

Place the battery into the plastic tray in the orientation shown

Place the battery tie down over the battery in the orientation shown, with the shorter hook towards the drivers side of the vehicle

Place the tie down hooks into their respective holes, then tighten down the two nuts with a 10mm socket, and a 3/8" drive ratchet until snug

If these are too tight the tie down can damage the battery cap

Place the positive cable over the positive terminal, then use a 10mm socket, and a 3/8" drive ratchet to tighten the terminal clamp

Place the negative cable over the negative terminal, then use a 10mm socket, and a 3/8" drive ratchet to tighten the terminal clamp

OE Intake installation is shown next. Skip to Step 31 and follow manufacturers instructions for aftermarket intakes

When reinstalling the airbox there is a rubber grommet on the bottom of the box that must fit on an aluminum peg in the engine bay

Insert the airbox into the engine bay in a similar manner that it was removed

The front will sit in an approximately correct location while the back pivots downward

Use care when maneuvering the rear brackets around the battery cables so as to not damage the cables

Press the front of the airbox down over the aluminum peg mentioned above

You should be able to feel the peg insert into the rubber grommet

Press the OEM intake tub over the airbox lid as shown

The battery cables will need to be reconnected to the airbox in the location shown

Press the plastic clips on the battery cables into the mounting holes on the airbox as shown

The airbox may need to be shifted around to align the mounting bolts with their matching threaded holes

Using a 10mm socket, and a 12" extension hand thread the lower mounting bolt

Use the same combination of tools and a 3/8" drive ratchet to tighten down the lower airbox mounting bolt

Using a 10mm socket, and a 12" extension hand thread the upper battery bracket bolt

Use the same combination of tools and a 3/8" drive ratchet to tighten down the upper battery bracket bolt

Use your hand to press the intake inlet back into its slots on the radiator shroud

This will require a bit of force, and some moving back and forth to ensure it is fully seated the first time

Hand thread the two inlet mounting bolts in the locations shown

Use a 10mm socket and a 3/8" drive ratchet to tighten both bolts

Verify the OE intake tube and EVAP elbow are fully seated in the locations shown

Use a 5.5mm socket and 3/8" ratchet or a small Phillips screwdriver to tighten the three intake clamps circled in yellow

Press the MAF wire loom into the mounting tabs on the airbox lid as shown

Plug the MAF sensor back in

The final bit of this install will be done under the vehicle

Lift the metal section of the undertray into position

The front edge of the metal will fit over the top of the rear edge of the plastic section of the undertray

To secure, push the skidtray forwards onto the two tabs that will hold it in position

Reinstall the four Phillips head screws and tighten until tight using a Phillips screwdriver

Reinstall the four quarter-turn screws and tighten using a large Flathead screwdriver. This will "click" into position when tight

Reinstall the two Philips head screw and tighten using a Philips screwdriver

This completes the installation of your 27WON Performance Boost Tubes

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