Review on Dorman 674-922 Driver Side Exhaust Manifold: Enhanced Performance for Select Models by Carlos Deuschle

The shaping is a bit rough but not too bad. The screw holes quickly cleaned with a grinder. The rear flange bolts included in the kit are tapped prior to tightening, these headers are randomly threaded but with a different thread pitch than the stock bolts. (m10x1.50, original m10x1.75) I used M10-1.5x50mm and it fit fine, just discarded the screws from the kit. You can drill the threads and through the bolt flange, I didn't realize that until the headers were installed. Just cost me time and a trip into town. Manifold bolt sets are also available separately, only 1 manifold per bolt set needs to be made.