| Re: 421 dyno |
Subject: Re: 421 dyno by 88BlackZ51 on 2011/10/7 8:29:56 Quote:
From everything I have heard it does neck down. I have heard 2.5" and I have now heard 2.75". I will know forsure in regards to mine when it comes off hopefully next week at the exhaust shop. If it does neck down then I know I will gain some with the x pipe forsure.... |
