Cometic GM LT1/L86/L87 4.125in Round Bore .58in MLX Head Gasket

SKU: CGSC15427-058

Head Gaskets

CG Head Gaskets

Cometic GM LT1/L86/L87 4.125in Round Bore .58in MLX Head Gasket

Cometic Gasket

Cometic GM LT1/L86/L87 4.125in Round Bore .58in MLX Head Gasket

SKU: CGSC15427-058

Head Gaskets

CG Head Gaskets

Special Order. Contact for ETA. This item is out of stock in our warehouse and partner distribution centres. In some cases, this may be due to not having live inventory feeds available for all suppliers. Please contact us before ordering if you need to meet a specific deadline.

We accept

Description

MLX Gaskets utilize an integrated "stopper" layer for combustion chamber sealing

Product Overview

COMETIC MLX (Multi-Layer Stopper) gaskets utilize an integrated stopper layer for combustion chamber sealing and improved clamp load around the cylinder without increasing bore distortion. MLX technology can be found in some head gaskets and are made from the same materials as our MLS Head Gaskets. No sealants or re-torque required.

Features and Benefits

Coated On Both Sides w/Viton

Product Details

Description:	GM LT1/L86/L87 Cylinder Head Gasket
Engine Make/Size:	GM Gen II LT1
OEM Part Number:	12688943
Part Number:	cgsC15427-058
Prop 65 (C, R or CR):	CR
Prop 65 - Short Label:	Prop_65.jpg
Prop 65 Warning Label:	Prop_65.jpg
Prop 65 Yes/No:	Yes
Title:	Cometic Automotive GM LT1/L86/L87 Cylinder Head Gasket
WARNING CA Proposition 65 Message:	The state of California has determined that certain chemicals used in the manufacture of this product have been known to cause cancer and birth defects. For more information; visit www.p65Warnings.ca.gov
WARNING CA Proposition 65:	Yes

Part Type

Engine Cylinder Head Gasket

Data: v4.2 - Upd: 2026-10-12 06:00:43

Features

Coated On Both Sides w/Viton
Improved clamp load around the cylinder without increasing bore distortion

Specifications

Product Attributes - Brand: Cometic
Product Attributes - Manufacturer's Part Number: C15427-058
Product Attributes - Part Type: Head Gaskets
Product Attributes - Product Line: Cometic MLX Head Gaskets
Product Attributes - UPC: 191070475352
Product Attributes - Bore (in.): 4.125 in.
Product Attributes - Bore (mm): 104.775mm
Product Attributes - Gasket Material: Multi-layer stainless steel
Product Attributes - Compressed Thickness (in.): 0.058 in.
Product Attributes - Compressed Volume (cc): 12.702cc
Product Attributes - Lock Wire: No
Product Attributes - Quantity: Sold individually.

Reference Information

Brand Name/s	Cometic Gasket
StreetFX SKU	cgsC15427-058
SFX Item ID	4162050
Supplier Item Code	4162050
Manufacturer SKU	C15427-058
Manufacturer UPC	191070475352
Alternative References	CGT-C15427-058, LT1/L86/L87, 4.125in, .58in