2.5 inch exhaust system at what point do they become restrictive

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25 January 2013 | 08:59 AM

l70byb.

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From: Crawley

2.5 inch exhaust system at what point do they become restrictive

Answers to the above question please guys !!! In the process of collecting parts for a 2.1 build and want to know if my exhaust will become a problem over 400hp ???

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25 January 2013 | 09:36 AM

harrisard

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From: walton,essex

from what I read on here 2.5 is good for upto 400 and 3 for 400+

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