Our aftermarket manifolds are some of the highest quality replacements on the market!

If your vehicle's exhaust is getting loud and the exhaust noise is coming from under the hood or engine then you may need to fix a cracked exhaust manifold. Replacing a broken manifold is easiest with a direct replacement manifold that will fit correctly and bolt up to you original engine and exhaust system. This manifold is a direct fitting replacement.

This cast iron exhaust manifold has been designed to replace the original GM design.

Specifications:

  • RH (Passenger Side)
  • 3 bolt flange
  • Corrosion resistant
  • Replaces original manifolds that are cracked from thermal expansion and contraction
  • Strengthened and redesigned in the vulnerable areas of failure
  • Built to strict quality control standards
  • Fits 7.4L 454 engines only
  • Does not have provision for emission tubes

Now you can buy a high quality exhaust manifold so REPLACE your broken, warped, or cracked one now with this great fitting, alternative.

This exhaust makes a great replacement and has substantial cost savings over a dealer exhaust manifold.

Lifetime Warranty

This item is backed by a Limited Lifetime Warranty. In the event this item should fail due to manufacturing defects during intended use, we will exchange the part free of charge (excludes shipping charges) for the original purchaser. Please keep your invoice for proof of this warranty.

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We need both sides for a 7.3 for a C3500 Chevy do you have both in a package?
Cathy on Nov 3, 2017
BEST ANSWER: Yes, please view our part number 1AEEK00079.

Vehicle Fit

  • 1996-2000 Chevy C2500 Truck Exhaust Manifold V8 7.4L Passenger Side Dorman 674-390
  • 1996-2000 Chevy C3500 Truck Exhaust Manifold V8 7.4L Passenger Side Dorman 674-390
  • 1996-2000 Chevy Express 3500 Van Exhaust Manifold V8 7.4L Passenger Side Dorman 674-390
  • 1996-2000 Chevy K2500 Truck Exhaust Manifold V8 7.4L Passenger Side Dorman 674-390
  • 1996-2000 Chevy K3500 Truck Exhaust Manifold V8 7.4L Passenger Side Dorman 674-390
  • 1996-1999 Chevy Suburban C2500 Exhaust Manifold V8 7.4L Passenger Side Dorman 674-390
  • 1996-1999 Chevy Suburban K2500 Exhaust Manifold V8 7.4L Passenger Side Dorman 674-390
  • 1996-2000 GMC C2500 Truck Exhaust Manifold V8 7.4L Passenger Side Dorman 674-390
  • 1996-2000 GMC C3500 Truck Exhaust Manifold V8 7.4L Passenger Side Dorman 674-390
  • 1996-2000 GMC K2500 Truck Exhaust Manifold V8 7.4L Passenger Side Dorman 674-390
  • 1996-2000 GMC K3500 Truck Exhaust Manifold V8 7.4L Passenger Side Dorman 674-390
  • 1996-2000 GMC Savana 3500 Van Exhaust Manifold V8 7.4L Passenger Side Dorman 674-390
  • 1996-1999 GMC Suburban C2500 Exhaust Manifold V8 7.4L Passenger Side Dorman 674-390
  • 1996-1999 GMC Suburban K2500 Exhaust Manifold V8 7.4L Passenger Side Dorman 674-390

This part replaces:

  • Hollander 327-1727R
  • Dorman 674-390
Only 2 left in stock
Part #: 1AEEM00223

Dorman
Brand #: 674-390