test pipes vs. HFC
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Join Date: Sep 2006
Location: tampa,fl
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U don't get alot more HP with test pipes... A few people on the forums have dyno'd the two and the test pipes gained 1 more hp than the HFcats... I really dont think that is worth it... And when u run test pipes ur CEL light comes on... I've gone through Kinetix's HF, test pipes, and then to Random tech HF cats... I like my hf cats ...
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Originally Posted by audio_file
the stillen race pipes i have don't cause cel, not sure why they're different. Be prepared though, with the lack of back pressure you actually lose a bit of torque w/o cats
And u can totally feel the loss in tq... Especially at lower RPM's... I was tempted to put my stock cats on... But i ran it at the track and broke into the high 13's with the HF cats... So i kept them on...