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915 heads with 2.14...lowering torque...
Your question depends on alot of varibles.
porting, cam, compression, intake, gear ?


logan426

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I think they were talking about the 1.88 exhaust valve? I know the more commonly used size is 1.81. Could this be a factor? They guy who machined the heads told me that it would compromise torque by cutting the exh. valve so big?? The intention for the heads was suppose to be used with twin 67mm turbo's.