(92 customer reviews)


These small bore, seven layer MLS head gaskets from BTR utilize the same sealing technology found in the ever popular LS9 gasket. This is the perfect choice If you have a 4.8 or 5.3 LS and want to turn the boost all the way up!


These small bore, seven layer MLS head gaskets from BTR utilize the same sealing technology found in the ever popular LS9 gasket. This is the perfect choice If you have a 4.8 or 5.3 LS and want to turn the boost all the way up!

WILL NOT WORK WITH A TRICK FLOW FAST AS CAST LS1 HEAD. For those and other aftermarket cylinder heads, we recommend BTR22033-2.


BTR SKU BTR973010-2
Brand Brian Tooley Racing
Part Type Head Gasket
Engine Type Gen III/Gen IV LS
Bolt Count 4-BOLT
Bore Opening 3.940″
Compressed Thickness .055″

92 reviews for BTR SMALL BORE HEAD GASKETS – 3.940″ BORE – .055″ THICKNESS – SOLD IN PAIRS – BTR973010-2

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