Driver Side Exhaust Manifold For 8.1L Chevrolet GMC Silverado/Sierra 2500 3500 – Cast Iron – 12557287

This is the driver side (left) exhaust manifold for 8.1L Chevrolet and GMC trucks.

It fits the Silverado and Sierra 2500 and 3500 models.

The manifold is made from cast iron and has a new surface finish.

It includes a heat shield and mounts with a 3-bolt style.

The manufacturer part number is 12557287, which supersedes 12555621.

It's a direct replacement, so it bolts right up.

This is an aftermarket product with a 90-day warranty.

If your original manifold is cracked or warped, this brand new unit will get your exhaust system sealed up and running quietly again.