Header banner
Revain logoHome Page
dorman 674 777 exhaust manifold kit logo

Dorman 674 777 Exhaust Manifold Kit Review

2

·

Poor

Revainrating 2 out of 5  
Rating 
2.0
🌫️ Exhaust & Emissions, 🛠️ Replacement Parts

View on AmazonView on ЯM

Media

(2)
img 1 attached to Dorman 674 777 Exhaust Manifold Kit
img 2 attached to Dorman 674 777 Exhaust Manifold Kit

Description of Dorman 674 777 Exhaust Manifold Kit

Ideal replacement - this exhaust manifold was precision-engineered and durably manufactured to match the fit and function of the stock manifold on specified vehicles. Reliable construction - durable materials resist warping, cracking and leaking for long-lasting performance. Complete repair - includes all necessary gaskets and downpipe hardware. Trustworthy design - built by industry leader in aftermarket manifolds. Ensure fit - to make sure this part fits your exact vehicle, input your make, model and trim level into the garage tool.

Reviews

Global ratings 2
  • 5
    0
  • 4
    0
  • 3
    1
  • 2
    0
  • 1
    1

Type of review

Revainrating 1 out of 5

Poor quality item. Pay a little more for a GM part.

Well it fits. That's the only positive thing I can say about this product. I worked as a mechanical engineer in the automotive industry for almost 30 years and should have known better than to buy this aftermarket Chinese junk but I was just trying to get the truck back on the road to sell it. Unfortunately my decision started to haunt me because my daughter drives now (she has an accident with her car). Who knows if cast iron might be close to the right grade. The processing is very coarse…

Pros
  • Complete repair - includes all necessary gaskets and downpipe fittings
Cons
  • Unsure

Revainrating 3 out of 5

Bad finish, bad shaping, bad heat shield. Obvious cost savings. But is the GM manifold really better?

I installed this header and warmed up the engine. I haven't driven a car yet. Therefore I have no long-term evaluation.1. The processing is very rough. It looks like it was planned when the Chinese kicked it on the concrete floor. 2. Gasketed flanges were wrong by 0.006-0.007 from start to finish.3. There was a casting gap near one of the bolt holes. I don't think it hurts, but it doesn't inspire confidence. If I had more time and were better prepared I would have this brand new header repaired

Pros
  • Rugged design - developed by the industry leader in aftermarket headers
Cons
  • Very expensive