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Subaru Big-Tube Equal Length Header
Subaru Big-Tube Equal Length Header |
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Equal Length DesignThe equal length design of the PERRIN header, produces smoother more balanced exhaust pulses flow from the head to the turbocharger giving you the best of two worlds. Quicker turbo response as well as more horsepower and torque throughout the entire RPM band. While designed to fit to the factory up-pipe, our header will mate with an OEM or aftermarket up-pipe, as well as any rotated turbo kits compatible with the factory header. |
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SizingYou wont see grossly, way over sized tubing to make our header LOOK better. That just slows down exhaust gases and looses response. The PERRIN Big Tube header uses 1.625" primary tubing that fits the Subaru exhaust port size. Our larger diameter header was designed for cars making 500+ wheel HP to not sacrifice low end power on cars with big aftermarket turbos installed. For those looking for more HP from their stock turbo to slightly upgraded turbo, we suggest to look at our Regular WRX/STI equal length header. |
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FlangesPERRIN Flanges are CNC machined from 304 stainless steel and counterbored on the back side to make smoother transitions. Flange ports sized properly to ensure exhaust coming out of the head has a smooth unobstructed path to the tubes. The ports are not over ported which causes gaskets to burn out quickly. |
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SoundBecause of it equal length design, the PERRIN header will alter the tone of your exhaust. The exhaust pulses from the engine are equalized and spread out producing a smoother, more refined sound. Some describe the sound to be EVO like similar to an inline four cylinder engine exhaust.» Listen to the difference |
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Oil PanMost headers collect on the passenger side of the engine, and due to space constraints, are not equal length, compromising exhaust flow. Because we use the added room provided by the oil pan (only on 2.5L turbo pans), we can create a smooth transition of the header primaries to the collectors, and collectors to up-pipe, providing more power and torque then the competition. See our install kits here. |
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Jeff's BlogRead Jeff Perrin's blog and lear why the big tube header was made and why it performance great. See it compared to our regular header and why you will need it for your big turbo kit.» Learn More |
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5 Year WarrantyPERRIN 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 |
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Off Road Use OnlyThis 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.» Learn More |
Specifications |
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| Weight | 12.5 lbs. |
Compatibility |
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| 2002-2005 WRX | *Requires STI type oil pan and oil pickup. |
| 2006-2007 WRX | *Requires modification to the oil cooler (Please call for details.) |
| 2004-2005 Forester XT | *Requires STI type oil pan, oil pickup, and 02-04 WRX oil cooler. |
| 2006+ Forester XT | *Requires the 02-04 WRX oil cooler. |
| 2004-2007 STI | Yes, No modification |
| 2005-2009 Legacy GT | Yes, No modification |
| 2008+ WRX | Yes, No modification |
| 2008+- STI | Yes, No modification |
*OEM parts |
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| Oil Pan with Header Cutout | Subaru Part #11109aa151 - Est. Price $108.28 |
| Oil Pick Up Tube | Subaru Part #15049aa110 - Est. Price $26.98 |
| Oil Cooler Assembly | Subaru Part #21311aa051 - Est. Price $219.95 |
| Oil Feed Pipe | Subaru Part #21317aa02 - Est. Price $43.38 |
| O-ring (not needed unless damaged) | Subaru Part #21370ka00 - Est. Price $5.82 |
The PERRIN Performance Header not compatible with header wrap material. Using Header wrap will void all warranties. The PERRIN Performance header will not fit Moroso 20965 oil pans. Please call with further questions.
Unequal length vs. Equal Length
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| As expected a bit of low end/off boost power lost, but some HP gain at higher HP levels. 10HP with no additional boost or tuning is pretty good and for sure those who are planning on buying a header and running close to 500WHP, should for sure consider this header over our regular one. |
In The Box
| (1) PERRIN Big-Tube Equal Length Header. |
| (2) PERRIN License Plate Frames |
| Instructions |
| Stickers |
| Warranty |