#1961, "RE: Addition of Greddy header" In response to In response to 2
The Greddy is not going to really affect the low end that much but free up some more power in the midrange and top due to its 4to1 design. The 4-2-1 headers out there will provide you with lowend and midrange but wont do anything for the top. Basically in my opinion its all about torque youll feel torque gains but very little HP gains.