Check out this exhaust idea.....
FYI: Some of the pipes in the HKS and Mugen exhaust system are actually SMALLER, not larger, than the ones in the stock system.
This tells you that at least some kind of research went into the design, in order to gain some power, as the more comon approach would be to make them larger.
This tells you that at least some kind of research went into the design, in order to gain some power, as the more comon approach would be to make them larger.
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