Ian, v4s sound really strange and lumpy running without a balance pipe . I remember a mate fitted twin sidepipes to his Pop and split the 4-2-1 manifold on his 1600 Xflow so a pair of cylinders fed each pipe, sounded crap :tdown:
If you want to run twin lake sstyle I'd try to incorporate a joiner pipe, maybe straight across teh back of teh engine ? To answer your original question, yes they do make a difference.
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