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Dual 3" exaust to big for 318?

1296 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.
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I would say that it's too big, but I would take them mufflers for free, and then just run a reducer like previously stated. Besides, three inch duals would be too much money for the loss of backpressure and torque. I got 2.5, just cause I plan on buildin' a 360 stroker this summer, while out of school and actually making money and not just wast...spending it on a good education. hmmmm. James
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