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PERRIN Equal Length Big Tube Headers
Subaru Models (inc. 2002-2014 WRX / 2004+ STI)
Product Resources
Features & Product Details
The PERRIN Big Tube Header is perfect for those of you looking to increase both horsepower and torque numbers. However because this header features 1.625” tubing, this makes for the perfect header for those employing a rotated setup looking to make more than 500 horsepower.
The E4 Series Big Tube Header comes with collectors that have been designed to further improve exhaust flow throughout the runners in an equal fashion. This results in improved power, but additionally the new E4 series has been designed to have a lower profile for ground clearance.
Users will also enjoy the benefits of the equal length design with balanced flow from the heads straight to the turbocharger. This results in quicker turbo response compared to the OEM manifold and improved response throughout the entire RPM range.
Plus one of the better benefits is the weight savings. The OEM manifold is constructed from a heavy, cast material that is burley, and restrictive. The PERRIN unit because of the materials is substantially lighter, and with enough patience it can be a one-person installation.
Fitment Notes:
Specifications
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QUESTIONS & ANSWERS
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Q: Perrin header vs Perrin big tube header Kninja225 months ago
I am currently just running aftermarket air intake, down pipe, turbo up pipe and eventually I’m gonna upgrade to FMI. Which header should I get ? Will it be ok to go with big tub headers just in case some day i upgrade and decide to make more hp?
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A: You would be better off with the standard Perrin Header unless you're looking to upgrade to a rotated turbo setup and make more than 500hp.
Jesse F. @ RallySport Direct 4 months agoWas this answer helpful?
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Q: Perrin big tube header vs Killer B oil pan Andrew E.1 year ago
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A: If it is the cast oil pan from KillerB, it will not fit.
Johnny M. @ RallySport Direct 12 months agoWas this answer helpful?
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Q: Perrin Rotated Turbo Kit Fitment Masterxing122 years ago
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A: I think that this would be ideal for your setup. Unfortunately there is no EGT bung option.
Tylo R @ RallySport DirectWas this answer helpful?
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Q: Up pipes Ferny2 years ago
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A: As long at the uppipe is a 2-bolt you should be fine.
Michael N.Was this answer helpful?
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Q: Lag Salem2 years ago
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A: These will be pretty laggy with a journal bearing Black, but would make a ton of top end power. Personally, I'd go for a smaller diameter collector, but the best choice will depend on your goals, tune, compression, fuel, and several other factors in your setup. If you're not planning on revving the motor to 8k+, these probably wouldn't be the best call, but if it's high revs/high power you're going for, these would be solid.
Marcus E. @ RallySport Direct 2 years agoWas this answer helpful?
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