2.5" or 3"
Sep 3, 2008 | 10:25 AM
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From: scooby land
2.5" or 3"
2.5" or 3" zorst for around 340bhp on 04sti i already have prodrive back box?
Sep 3, 2008 | 11:00 AM
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From: Api 500+bhp MD321T @91dB Probably SN's longest owner of an Impreza Turbo
2.5" will be fine, I have a full decat 2.5" with a tad over 400bhp
Sep 3, 2008 | 11:01 AM
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From: Standing Up
Sep 3, 2008 | 11:48 AM
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From: Portsmouth
Sep 3, 2008 | 06:22 PM
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From: Hertfordshire
Sep 3, 2008 | 06:34 PM
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From: MK
+4
Sep 3, 2008 | 08:10 PM
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I've seen good gains from going from a 2.5inch to a 3inch at around 400hp myself.
Sep 3, 2008 | 11:25 PM
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From: Ayrshire
emailed AndyF about this when I was ordering parts for my remap and his reply was that he has a 2.5" system on his 450bhp spec c track car.
Sep 4, 2008 | 08:50 AM
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From: scooby land
is the prodrive system any good? i only have the back box and i would need to get the middle section and the downpipe.
2.5" or 3"
