Sierra 18-1254 Vortec Head Gasket Set, Replaces 27-75611A03, GM Small Block V8

The Sierra 18-1254 Vortec Head Gasket Set is a complete head gasket set built for small block GM V8 engines equipped with Vortec heads, including MCM/MIE GM V-8 305, 350 and 377 cid Gen+ engines from 1996 and newer. It is engineered to meet the demands of high horsepower marine engines and to hold up in the harsh marine operating environment, sealing the cylinder head to the block to maintain compression and prevent coolant or oil leakage at the head joint.

This is a direct replacement for OEM number 27-75611A03, so it installs using the factory bolt pattern and sealing surfaces without modification. As with all Sierra parts, it is built to meet or exceed the performance of the original equipment part it replaces, and it is backed by Sierra's industry leading customer satisfaction warranty. Boat owners and marine technicians use this set during head gasket replacement, engine rebuilds, or top-end overhaul work on compatible small block V8 engines.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-1254
• Product Name: Vortec Head Gasket Set
• Fitment: Small Block GM V8 engines with Vortec heads
• Compatible Engines: MCM/MIE GM V-8 305, 350 & 377 cid Gen+ engines (1996 and Newer)
• Fit Type: Universal Fit
• Replaces (OEM): 27-75611A03
• Weight: 1.36 pounds
• Product Dimensions: 0.39 x 0.39 x 0.39 inches
• UPC: 808282304768
• Warranty: Covered under Sierra's customer satisfaction warranty

Fitment

• Small Block GM V8 engines with Vortec heads
• MCM/MIE GM V-8 305, 350 & 377 cid Gen+ engines (1996 and Newer)

Replaces (OEM)

• 27-75611A03

Frequently Asked Questions

What engines does the Sierra 18-1254 head gasket set fit? The Sierra 18-1254 Vortec Head Gasket Set fits small block GM V8 engines with Vortec heads, including MCM/MIE GM V-8 305, 350 and 377 cid Gen+ engines from 1996 and newer.

What OEM part number does 18-1254 replace? It is a direct replacement for OEM number 27-75611A03.

How much does the 18-1254 head gasket set weigh? The Sierra 18-1254 Vortec Head Gasket Set weighs 1.36 pounds.

Is the Sierra 18-1254 a complete head gasket set? Yes, 18-1254 is sold as a complete Vortec head gasket set for small block GM V8 engines, not an individual gasket.

Will this gasket set work on a non-Vortec small block GM head? The 18-1254 set is designed specifically for small block GM V8 engines with Vortec heads, so it is intended for that head configuration rather than earlier non-Vortec head designs.

Does Sierra 18-1254 come with a warranty? Yes, the 18-1254 Vortec Head Gasket Set is covered under Sierra's customer satisfaction warranty like all Sierra parts.

Is Sierra 18-1254 a genuine Sierra part or an aftermarket copy? 18-1254 is a genuine Sierra part, engineered and sold under the Sierra brand to meet or exceed the performance of the original equipment part it replaces.

What are the dimensions of the 18-1254 gasket set packaging? The product measures 0.39 x 0.39 x 0.39 inches as packaged.

Can I use 18-1254 for a top-end engine rebuild? Yes, the Vortec Head Gasket Set is commonly used during head gasket replacement, engine rebuilds, or top-end overhaul work on compatible GM small block V8 engines.

Does the 18-1254 set fit both MCM and MIE engine configurations? Yes, it is listed as fitting MCM/MIE GM V-8 305, 350 and 377 cid Gen+ engines, 1996 and newer.

What is included with the Sierra 18-1254 set? The 18-1254 is a head gasket set for small block GM V8 engines with Vortec heads, covering the head gasket sealing components for that engine platform.