Accurate Exhaust

bighammer said

Thanks for the replies, Oldkimmer and Tom. Tom, the manifolds I have for my car may not (?) be a matched set, but they both have 2 1/4" outlets, and neither side has a ball flange. From what you posted above, it sounds like I can get 2.25" all the way thru?

Thanks

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Yes you can get a full 2.25" system. But you will need to beware that unless you use a full length 3 tube , 3 baffle reverse flow muffler you may experience some unwanted passenger compartment resonation under load and acceleration. Our tubing is of a heavy gauge material which will alleviate some of the resonation with high flow style mufflers but it will not alleviate it enough for some. We are careful to be on the conservative side of what mufflers we supply for a customer so as not to have a drone/resonation problem and even then we still get some. Chrysler engineers were pretty sharp on exhaust technology back in the day.They started bigger up front and tapered down the exhaust at the rear. This kept the exhaust pulse stronger through low and mid range rpm which is where most of us drive anyways. The bigger the pipe the more rpm it takes to keep the exhaust pulse waves strong especially aft (rear) of the mufflers. That is why it may be of no benefit to increase the left head pipe size at the flange from 2" to 2.25" for your application. Only if you are consistently running at 4-6k rpms would bigger pipe be of any real value.