1970-74 Chevy Corvette Exhaust Manifold Dorman 674-506 - 1AEEM00170

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


  • LH Driver's 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

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

Dealer list ~ $281.00 (obsolete)

It is a great replacement and has substantial cost savings over an original dealer unit.

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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Vehicle Fit

  • 1970-1974 Chevy Corvette Driver Side Exhaust Manifold 454ci & for Models with Casting # 3969923 Dorman 674-506

This part replaces:

  • OE # 3969923
  • Hollander 327-751L
  • Dorman 674-506
Part #: 1AEEM00170

Out of Stock

Brand #: 674-506