Review on ๐ง High-quality Dorman 674-501 Exhaust Manifold for Chevrolet and GMC Models by John Fenton
Dorman Exhaust Manifold
I used these on my 1981 Corvette. The factory headers had an AIR exhaust system with a smoke pump and EGR valve. I removed all of that to allow the engine to breathe better. Easy install, all required hardware included, great price. The factory scraps were rubbish.
- One Year Test
- Negative Present
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