i on my d16 dohc i have 2.25" catback with 15" hotdog mid pipe 9" hotdog but before the axel and a 8x4x14 oval muffler on the rear and i love its sound and less than 400. deep and tough. gain throughout the rev range, maybe slight loss down below 2k, which i never use, the gain i got up top was unreal 5k-7k+ huge boost. sohc i'd keep it 2" but all straight flowing. the rear oval muffler offset centre is a winner imo. so aim for a 14-17" hotdog mid pipe and a oval 8x4x14" straight through or even chambered rear muffler. chambered rear mufflers give a deeper note too, but can sound too deep almost farty.


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