Header versus up-pipe HP gains
02-22-2003 | 08:37 PM
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Joined: Dec 2002
Posts: 101
From: MA
Car Info: 2002 WRX/STI 2.5 liter VF22
Header versus up-pipe HP gains
I was looking at the GT Spec header and up-pipe combo. I already have a catless godspeed uppipe, and have noticed a significant difference in turbo spool and power after the install. However, since GT Spec claims 25hp and 35lbs torque gains with their package, I was wondering how much of this gain is coming from the uppipe and how much of it is coming from the header. Does anyone know????
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