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Up-Pipe 1.75" for 2002-14 WRX, 2004-2018 STI


2 Hours

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WARNING: This product can expose you to chemicals which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to

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Subaru Up-Pipe

PERRIN has been known since our inception for the quality of our Up-Pipe. The Up-Pipe was the first product we ever released and has been a leader in this market ever since. Our Up-Pipe is one of the best ways to increase the power and throttle response on your Turbocharged Subaru. Why go with an imported imitation when you can have the original?

Precision CNC Bent Tubing

321 stainless steel tubing is CNC mandrel bent and precision welded to perfection. This eliminates the need for a flex joint, which is a major weakness in other up pipes including the OEM one.

Critical Correct Sizing

The PERRIN Up-Pipe inside diameter best matches the OEM exhaust manifold outlet and OEM turbo inlet. This is critical to maintaining exhaust gas velocity increasing turbo spool up. Typically we see 250-350 RPM quicker turbo spool up after installation. For a stock turbo, the 1.75" Up-Pipe is the perfect choice for spool and HP. Our 2" Up-pipe is a perfect choice for those looking for a larger Up-Pipe for higher HP applications. Check out the details at: Big Tube Up-Pipe


PERRIN Flanges are CNC machined from 304 stainless steel, 1/2" thick and counterbored on the back side to make a smooth transitions from cylinder head to exhaust tubing.

Off Road Use Only

This product is legal in California only for racing vehicles which may never be used upon a highway. Check your local and federal laws prior to installation.
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5 Year Warranty

PERRIN Performance warrants to the original purchaser, all PERRIN products to be free from defects in material and workmanship within a sixty (60) months period from the date of purchase. *Some exclusions apply
» Read Full Warranty

Warranty Exclusions

We will not warranty any exhaust part that fails or has warped flanges with header wrap installed. While header wrap protects the engine from heat as well as provides some performance benefits, it greatly reduces the life of any stainless steel part. Header wrap greatly increases the rate of corrosion (even stainless steel corrodes), added to that the actual temperature of the metal is much hotter, reducing its lifespan even further. Operation of vehicle without installation of splash guard will void warranty.

We will not warranty any flanges that are warped away from the weld if any aftermarket gaskets are used. Only OEM Subaru gaskets are to be used on this PERRIN Exhaust part, with the exception of downpipes for turbo kits. Subaru provides the proper crush gasket that still becomes flat when tightened (or over tightened) in comparison to aftermarket gaskets which can have a crush ring that is too think causing a hot-spot in the middle of the flange. These will warp the flanges of your PERRIN exhaust, causing a permanent exhaust leak that will not be fixable with a new gasket.


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Warranty Details

This product features a 5 year warranty Read Full Warranty

Tech Department


In The Box

In The Box

(1) PERRIN Up-pipe
(5) Up-pipe studs
(1) PERRIN License Plate Frame

Dyno Charts

Dyno Charts

Proven Horse Power

Dyno Chart

STI Up-Pipe Test

The first and only back to back dyno runs of an Up Pipe are what you are seeing. During one of our many dyno testing days, we decided to test the PERRIN uppipe on a Stage 2 STI. Most people don't normally replace the OEM up pipe on the STI or other cars with catless up pipes, but we did! We were very surprised with how this performed, as we didn't think we would get much power. Basically we gained 10WHP and 10ft-lbs of TQ across the board, and this was with ZERO ECU retuning done. On the 02-05 WRX(where the uppipe is catted) there is roughly 20WHP gained by replacing the OEM part with ours.

Compatibility Notes


2002-2005 WRX Yes, see note below.
2006-2014 WRX Yes
2004-2014 STI Yes
2015-2018 STI Yes
2005-2013 Forester XT Yes
2005-2006 Legacy GT Yes, see note below.
2007-2009 Legacy GT Yes

Using the Up-Pipe on 2002-2005 WRX is strictly for off-road use only and not for use on public streets and highways.



Shipping Weight 5.3 lbs.
Material 304 Stainless Steel


Shipping Information

  • Item Requires Shipping
  • 5.0 lbs.
  • W8.0000” x H8.0000” x L20.0000”
  • This item ships in its own box.