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my current set up is 2 1/4 x pipe and thrush turbo mufflers. I liked them at first but they are too quiet for my tastes now. Is there any muffler brand that offers something in between the sound of a flowmaster 40 and a 10 series?

Is there a noticable difference between stock and later 318 manifolds in how they flow? I have read that the 90's manifolds flow better but would it be worth it to replace my current ones? I dont want to go through the hassle of having to replace my starter with a mini starter just to put on...

Finally ordered my mufflers and x pipe. Going to go with. 2 1/4 inch. I have heard mixed reviews with the thrush turbo mufflers with their build quality. Has anyone had bad luck with them?

i have a 74 Dart with the LA 318, currently the exhaust is still the tiny single exhaust from the factory. My plan is to put a 2.5 inch duals with an x pipe and turbo mufflers exiting out the sides before the rear tires. Will this set up have any noticeable power and mpg gains? I know the...