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I just had the honker air intake installed and am thinking about modifing the exhaust system. How much h.p. can i expect to get by just putting on a system from the x pipe back ,changing the mufflers to ones that dont have the chambers, packing or the baffles of conventional ones??
Adding a cat back system is NOT going to give you anything earth shattering~! 5-8 is about normal but, a good free flowing exhaust system is the BASIC building block for heads/cam addition.