L15-6-307-X5X1X Race MAF Upgrade

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A tune will be required after installing this part. The tune will involve rescaling the MAF tables to correct for the larger inner diameter of the Race MAF. The Car should not be driven until a tune is applied

This guide will assume that you have our intake installed. If you don't then here is the link to install our intake:https://tinyurl.com/ycwfnc7m

Press down on the tab and disconnect the wiring harness from the MAF Sensor

Use a 10mm wrench or socket and ratchet to loosen the clamp on the turbo inlet pipe

Clamp size will be 67-75mm for OEM Turbo inlet pipe and 86-94mm for 27WON Turbo inlet pipe

Use a 10mm wrench or socket and ratchet to loosen the 86-94mm clamp on the airbox

Slide the outer clamps in the direction of the blue arrows

Pivot the MAF & Silicone assembly up and off of the turbo inlet pipe

The silicone coupler is flexible enough to bend and distort as needed.

Set the outer clamps aside. You will use them later when installing the Race MAF

Use a 3mm Allen Key to remove the socket cap bolts from the MAF housing

Remove the MAF sensor from the housing

If you are having issues, try turning the sensor while pulling, this should help

Be careful to not pinch and damage the o-ring on the sensor

The Race MAF housing comes assembled with the necessary MAF sensor installation hardware and clamps

The Race MAF housing has a small cutout at the top for the wiring harness. This cutout will face the rear of the vehicle once installed

Silicone coupler between the Race MAF housing and the turbo inlet pipe

Silicone coupler between the Race MAF housing and the airbox

On both silicone couplers there is a "W" logo. The bottom of the "W" will face the front of the vehicle once installed

Use a 3mm Allen Key to remove the socket cap bolts from the Race MAF housing

Install the MAF sensor into the Race MAF housing

If you are having issues, push the sensor into the housing while turning the sensor, this should help

Be careful to not pinch and damage the o-ring on the sensor

Align the sensor with the stainless steel standoff and install the socket cap bolts

Torque the socket cap bolts to 24-48 in-lbs

Transfer the outer clamp for the turbo inlet pipe side. Keep it loose

Clamp size will be 67-75mm for OEM Turbo inlet pipe and 86-94mm for 27WON Turbo inlet pipe

Align the "W"s to the top, inline with the MAF sensor then tighten the 92-100mm clamps with a 10mm wrench or socket and ratchet until snug (the silicone will start to bulge at the edge of the clamp slightly)

Transfer the 86-94mm clampfrom the airbox side. Keep it loose

A small gap between the end of the silicone and the Race MAF housing is normal. This is required for proper connection of the internal step in the silicone

Angle the Race MAF & Silicone Assembly into the engine bay and onto the airbox as shown

Verify the silicone coupler connecting to the airbox is over the circumference of the airbox outlet

Pivot the Race MAF Assembly down and onto the turbo inlet pipe

The silicone coupler is flexible enough to bend and distort as needed to fit over the turbo inlet pipe

Adjust the silicone coupler to fit around the inlet of the turbo inlet pipe

If needed, rotate the Race MAF & Silicone assembly so the MAF sensor and "W" are facing upward as shown

Before tightening all clamps down, check that the T-bolts are not orientated in a way that causes the threaded rods to contact the hood or core support. Adjust if necessary

Use a 10mm wrench or socket and ratchet to tighten the clamp on the turbo inlet pipe side

Clamp size will be 67-75mm for OEM Turbo inlet pipe and 86-94mm for 27WON Turbo inlet pipe

Use a 10mm wrench or socket and ratchet to tighten the 86-94mm clamp on the intake side

Tighten the clamps until snug (the silicone will start to bulge at the edge of the clamp slightly)

Connect the wiring harness to the MAF sensor as shown

Now that you have finished installing your new Race MAF a tune will be required to rescale the MAF tables

Do not drive the car until a new tune has been applied

This completes the installation of your 27WON Performance Race MAF

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