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Dual 3" exaust to big for 318?

1295 Views 6 Replies 7 Participants Last post by  BrianT
Hey ya'll, I gots me a little question:
I can get two 3" 40 series flow masters for free. And, since my '77 needs/I want new exaust any ways, I figured what the hell.
Can I run true dual 3" exaust from the headers? My 318 is mildly warmed up, but is getting 340 or 360 heads this summer, and a new cam/timing chain.
So, is it OK?
-Steve C.
1 - 1 of 7 Posts
Well u cna run them but u need ot get the cut down forthem and run 2.5 in pipe with 3 inch mufflers will work . Just keep the pipe size under 2.5 andu will be a-ok
1 - 1 of 7 Posts
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