B18 Header
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Re: B18 Header (SI HB 90)
the 4-1 will help out the top end, and the 4-2-1 will help out the midrange power
i would say go for the 4-2-1 since these engines have no torque, and that can hurt the midrange power....
i would say go for the 4-2-1 since these engines have no torque, and that can hurt the midrange power....
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