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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 tubular steel manifold has been designed to eliminate the faults of the original GM design.


  • Heat shield included
  • 2 bolt flange
  • Includes Gaskets and Hardware
  • Direct replacement
  • Corrosion resistant
  • Replaces original manifolds that are cracked from thermal expansion and contraction
  • Strengthened and redesigned in the vulnerable areas of failure

Now you can buy a high quality exhaust manifold that is built to strict quality control standards. REPLACE your broken, warped, or cracked one now with this great fitting, alternative.

Item Condition: New

Attention California Customers:

WARNING:  This product can expose you to chemicals including Nickel (Metallic), which is known to the State of California to cause cancer. For more information, go to

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.

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Year Make Model Description
1985-1988Chevy Blazer S10 Chevy Blazer S10 Exhaust Manifold L4 2.5L 151ci Dorman 674-100
1985-1993Chevy S10 Pickup Chevy S10 Pickup Exhaust Manifold L4 2.5L 151ci Dorman 674-100
1985-1988GMC Jimmy S-15 GMC Jimmy S-15 Exhaust Manifold L4 2.5L 151ci Dorman 674-100
1985-1990GMC S-15 Pickup GMC S-15 Pickup Exhaust Manifold L4 2.5L 151ci Dorman 674-100
1991-1993GMC S-15 Sonoma GMC S-15 Sonoma Exhaust Manifold L4 2.5L 151ci Dorman 674-100
Part #: 1AEEM00003

Out of Stock

Brand #: 674-100