I never changed the port timing even with running the 19mm .. it blast and blast for us in htown. Tho, I did match the exhaust exit hole to a polini exhaust gaskt and I think we matched it to the polini 19mm intake..
I never changed the port timing even with running the 19mm .. it blast and blast for us in htown. Tho, I did match the exhaust exit hole to a polini exhaust gaskt and I think we matched it to the polini 19mm intake..
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