Borla XR1 and cobb down pipe
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Posts: 2,674
From: South SF
Car Info: 97' Dodge Cummins and an RSTI thingie
the cobb is, but it tapers to the stock 2.5" size because it mates with the borla.... anyways that's what I believe, I actually haven't looked at it for 2 years and I didn't buy it originally so I'll see in a few days when I take it off.
Last edited by code3suby; Feb 9, 2011 at 11:58 PM.
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