Review on 🔧 Dorman 674-159: High-quality Driver Side Exhaust Manifold Kit for Chevrolet/GMC Models, in Sleek Black by Doug Hawkins

I bought this Dorman Manifold 674-159 for my '84 Chevy C30/454. The casting is of very poor quality and when I fitted the manifold it hit the engine block and did not fit snugly between the head and the manifold mounting flange. I had to sand down the casting numbers and then some more to make the mounting surface match. The collector still hits the block, but I'm afraid to keep grinding it. The 674-161 I bought for the right side fits great and was a lot better quality than I expected from Dorman.