Interesting setups. I have heard about guys doing 3” from the manifolds to the mufflers and using a reducer form 3”-2.5”I do like that idea.
I was asking about opening up my mufflers because I came across a good deal on a flowmaster 1041 3” system for my car.
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Sean
1967 GTO
Koerner built 468 with Edelbrock RP’s 315cfm by Butler, Luanti Voodoo HR 20510713, 4l80e, Holley Terminator EFI
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