The peak torque on a renix 4.0 comes in at 2400 RPM and the HO at 4000 RPM. My question is, where does it come from? Is it the head, intake, exhaust, camshaft? obviously it is a combination of factors, but what is the biggest factor? I am using an HO longblock, HO exhaust, with renix electronics, intake, throttle body. Where can I expect my peak torque? I raised the intake to match (close, not perfect obviously) the head. I know this information is in the archives somewhere, but I couldn't find it. Thanks.