Homeless Hemi, Part 3: How Much Power Do Headers Add to a 5.7 Hemi?

build of our Gen. III Hemi, this is a 5.7 liter engine out of a Ram pickup that had been sitting in the shop. We cleaned it up, and got it running in stock condition, then hit it with a shot of nitrous. In “Homeless Hemi, Part 2” (July ’20), we changed the cam and valvesprings, picking up 67 horsepower in the process. At that point, we decided to test the Hooker long-tube headers we have been using against OE cast-iron manifolds to see how much power they were contributing. As it turns out, they