2002-07 WRX & STi Perrin E4-Series Equal Length Headers

2002-07 WRX & STi Perrin E4-Series Equal Length Headers

$900.00

Standard Size E4-Series

The new PERRIN E4-Series Equal Length Header design produces smooth, balanced exhaust flow from the heads to the turbocharger. This new design will give you a quicker turbo response while adding horsepower and torque throughout the entire RPM band. The E4-Series header comes with collectors that have been designed for better exhaust flow while allowing the headers to be constructed much more accurately. While designed to fit to the factory up-pipe, PERRIN's header will also mate with an aftermarket up-pipe that fits factory header and turbo, as well as any rotated turbo kits compatible with the factory header. The improved exhaust flow and more precise construction increases power and reliability.

The PERRIN E4-Series Equal Length Header uses 1.5" brushed stainless primary tubing that is expanded at the flange to fit the Subaru exhaust port size. This tubing is perfectly designed for cars up to about 400WHP. Each Flange are CNC machined from 304 stainless steel and counterbored to make for a smoother transition. The flange ports are sized properly for the smoothest possible flow that will not only increase performance but also alter the tone of the exhaust pulses for a more refined sound. Some describe the sound as being similar to an inline four cylinder engine exhaust.

Unlike the PERRIN E4-Series Equal Length Headers, most headers collect on the passenger side of the engine, due to space constraints those are not equal length and will disrupt the exhaust flow. PERRIN utilized the added room provided by the oil pan (only on 2.5L turbo pans), which allowed them to create a smooth transition of the header primaries to the collectors, and collectors to up-pipe, providing more power and torque then the competition. 2.0L WRX engines will need the 2.5L STI oil pan install kit.

If a good looking, high flowing, quality made header that will work with the setup you currently have is what you are missing on your Subaru then the new PERRING E4-Series Equal Length Header should be on your to-do list of modifications. PERRIN backs up the quality of their product with a 5 year (60 month) warranty from original purchase date.

Notes:

  • This product will only fit 02-05 WRX models with the purchase of an 2.5L oil pan
  • Wrapping this header with exhaust wrap will void Perrin's warranty on this product.

FITMENT:

  • Subaru STI 2004-2007
  • Subaru WRX 2002-2007

Big Tube E4-Series

The new PERRIN E4-Series Equal Length Big-Tube Header design give you all the great benefits of the smaller diameter header with the capabilities of producing a higher horsepower rating with better flow characteristics. Designed for engines making 500+ WHP the 1.625’_’_? primary tubing that expands at the flange for a free flowing design that will not have any disruptions and drastically improve your acceleration response. The E4-Series Equal Length Big-Tube Header still mates up to the factory up-pipe but suggested to be used with an aftermarket up-pipe as well as any rotated turbo kits that are compatible with the factory headers.

If a big tube header is needed for the 500WHP that you are putting down on your Subaru then the new PERRING E4-Series Equal Length Big-Tube Header should be on your to-do list of modifications. PERRIN backs up the quality of their product with a 5 year (60 month) warranty from original purchase date.

Notes:

  • This product will only fit 02-05 WRX models with the purchase of an 2.5L oil pan
  • Wrapping this header with exhaust wrap will void Perrin's warranty on this product.

FITMENT:

  • Subaru STI 2004-2007
  • Subaru WRX 2002-2007
Options:

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