The BTR LS1 head gasket is a multi-layered steel (MLS) gasket engineered to seal the cylinder head to the block on GM 4.8, 5.3, and LS1 engines. It is a direct replacement for the factory LS1/LS6 head gasket, sourced from the same supplier as the OEM units. Sold as a pair, it is built to the bore and thickness specs required for a reliable, consistent seal.
- Part Number: BTR98544
- Application: GM LS-Series (4.8/5.3/LS1), direct replacement for LS1/LS6
- Material: Multi-Layered Steel (MLS)
- Sold As: Pair
- Bore: 3.910 in
- Compressed Thickness: 0.051 in
- Fitment Note: Will not work with early-style notched LS1 cylinder heads
FAQ
What engine platforms is this head gasket for?
This gasket fits GM 4.8, 5.3, and LS1 engines and is sold as part number BTR98544.
How many gaskets come in this listing?
This listing includes a pair (two gaskets), enough for a complete engine's left and right cylinder heads.
What is the bore size and compressed thickness?
The gasket has a 3.910 in bore and a compressed thickness of 0.051 in, using multi-layered steel (MLS) construction.
Will this gasket work with early-style notched LS1 cylinder heads?
No, this gasket will not work with early-style notched LS1 cylinder heads.

