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Old 11-07-2010, 06:50 PM   #17
Equilibrium Tuning
Former Vendor
Member#: 26933
Join Date: Oct 2002
Chapter/Region: BAIC
Location: Fairfield, CA
2006 STI


I don't know... I haven't tuned too many perrin header VF cars that had a torque peak near 4500RPM. I've also seen a lot of perrin headers leak from the slips or warped flanges, so I wouldn't be surprised at all if that's what caused the excessive lag.

The only real fair comparison I see here is the one done by EFI. It shows some healthy gains above 5k RPM with a bit of added lag compared to a factory header. Now I'd really like to see a fair comparison with a Tomei/GTSpec/MadDad header.

-- Ed
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