Helix downpipe vs. Invidia
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Joined: Oct 2005
Posts: 59
From: NY
Car Info: i have an 05 mustang, but i want a suby
Helix downpipe vs. Invidia
I have a Buscher Racing cat-back that tapers down to 2.5" and I'm not sure if I should get the invidia downpipe which is 76mm or the Helix which is 80mm. Will it make a difference or not?
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