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GM Gaskets and Seals

Thunder Racing carries most GM gaskets and seals needed for your rebuild. If you do not see the gasket or seal that you need, please feel free to call us at 877-516-RACE, or email a sales representative.

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 Part #
Product
Price
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Wish List 
20-12553047 
GM LS1 EGR Gasket, (1998-2000 F-Body Only)
$7.49
Buy
Wish
20-26016661 
GM 7.5" Rear End Cover Gasket
$9.99
Buy
Wish
20-12633904 
GM Front Cover Gasket, Fits LS1/LS2/LS3/LS6/LS7
$23.99
Buy
Wish
20-12557840 
GM LS1/LS2/LS6 Crankshaft (Harmonic Balancer) Bolt
$4.99
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Wish
20-12617944 
GM Exhaust Manifold Gasket, Fits LS1/LS2/LS3/LS6/LS7
$13.49
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Wish
20-12612350 
GM LS1 Oil Pan Gasket
$36.99
Buy
Wish
20-12498545 
GM LS1 Head Bolt Kit for single cylinder head, contains 5 M8 bolts, 2 short head bolts, and 8 long head bolts. 
$27.99
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Wish
20-12557752 
GM LS1 Oil Pump to Pick-Up O-Ring
$6.49
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Wish
20-17800568 
GM LS- Head Bolt Kit for single cylinder head, 2004 & up LS1/LS2/LS6/LS3/LS7 & Gen III/IV.
$28.99
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Wish
20-12585673 
GM LS1 Front Main Seal, Fits LS1/LS2/LS3/LS6/LS7
$20.99
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Wish
20-12611384 
GM LS1 Oil Cooler Gasket
$3.99
Buy
Wish
20-89060436 
GM LS1 Rear Main Seal, Fits LS1/LS2/LS3/LS6/LS7
$20.49
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Wish
20-12639249 
GM LS1 Rear Cover Gasket, Fits LS1/LS2/LS3/LS6/LS7 (Old PN 12633578)
$22.99
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Wish
20-12524653 
LT1 Intake Manifold Gasket set
$33.99
Buy
Wish
20-12528884 
LT4 Intake Gasket set
$31.99
Buy
Wish
20-12367777 
GM Performance Parts LT4 Intake Gasket, (sold indidually)
$22.95
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Wish
20-10046089 
LT1 Valve Cover Gasket (2 required)
$27.99
Buy
Wish
20-10055726 
LT1 EGR Gasket
$4.49
Buy
Wish
20-10105379 
LT1 Throttle Body Gasket, Fits 48 & 52mm  
$6.99
Buy
Wish
20-10108689 
LT1 Cylinder Head Coolant Tube Seal (4 required)
$6.99
Buy
Wish
20-10128293 
LT1 Timing Cover Gasket
$5.49
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Wish
20-10128316 
LT1 Crank Seal
$14.49
Buy
Wish
20-10128343 
LT1 Water Pump Gasket (2 required)
$4.18
Buy
Wish
20-10168457 
LT1 Cylinder Head Gasket, .050" Thickness (sold individually)
$37.49
Buy
Wish
20-12551488 
LT4 Cylinder Head Gasket, .043" Thickness (sold individually)
$37.49
Buy
Wish
112-1074 
Fel-Pro LT1 Head Gasket (sold individually)
$49.99
Buy
Wish
Images:
Part No. 112-1074 (Image is representative of product but may vary from actual photograph)

20-10217886 
LT1 Driven Gear Seal
$8.49
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Wish
20-12552428 
LT1 Distributor Seal, 1995-1997
$8.49
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Wish
20-10108676 
LT1 Oil Pan Gasket
$48.99
Buy
Wish
20-12551933 
GM LS1 Coolant Seal (4 required)
$7.49
Buy
Wish
20-12558809 
GM LS1 Cylinder Head gasket, graphite, passenger side
$38.99
Buy
Wish
20-11570046 
GM LS3 Harmonic Balancer Bolt M16 x 2 x 125.75mm
$12.09
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Wish
20-12558810 
GM LS1 Cylinder Head gasket, graphite, driver side
$38.99
Buy
Wish
20-12589226 
GM 5.7L/5.3L Multi-Layer Steel LS1/LS6 Cylinder Head Gasket
$24.99
Buy
Wish
20-12589227 
GM 6.0L Multi-Layer Steel LS1/LS2 Cylinder Head Gasket (Sold individually)
$38.59
Buy
Wish
20-12533587 
GM LS1/LS6 Intake Manifold Gasket Set
$72.99
Buy
Wish
20-12556429 
GM LS1 Valve Cover Gasket, 1998 (2 required)
$18.99
Buy
Wish
20-12637683 
GM LS1 Series Valve Cover Gasket, 1999 and up (2 required)
$18.99
Buy
Wish
99-VCB-FAST 
Thunder Racing "Button Head" Valley Cover Bolt Kit for FAST Intake Manifolds (Replaces GM Valley Cover bolts)
$14.99
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Wish
Images:
Part No. 99-VCB-FAST (Image is representative of product but may vary from actual photograph)

20-12559648 
GM LS1 Water Pump Gasket, 1998 (2 required)
$1.99
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Wish
99-SS-FAST 
Thunder Racing Stainless Steel Hardware Kit for FAST Intake Manifold (Replaces all bolts)
$69.99
Buy
Wish
Images:
Part No. 99-SS-FAST (Image is representative of product but may vary from actual photograph)

20-12630223 
GM LS1 Water Pump Gasket, 1999 and up LS1/LS2/LS3/LS6/LS7 (2 required)
$5.99
Buy
Wish
20-12553617 
GM LS1 Smog Pump Gasket, (1998-2000 F-Body Only)(2 Required)
$1.50
Buy
Wish
20-12557932 
GM LS1 EGR Seal (1998-2000 F-Body Only)
$11.99
Buy
Wish
20-10128317 
LT1 Distributor Seal, 1993-1994
$4.99
Buy
Wish
20-10088158 
LT1 Rear Crank Seal
$24.82
Buy
Wish
20-12558178 
GM LS1 Valley Cover gasket, LS1/LS6/LS Trucks w/ non-D.O.D
$22.99
Buy
Wish
20-12582179 
GM 7.0L Multi-Layer Steel LS7 Cylinder Head Gasket, 4.150" Bore 
$34.99
Buy
Wish
20-89017852 
LS7 Intake Manifold Port Seals, Set of 8
$32.99
Buy
Wish
20-12573460 
GM LS1 Oil Galley Plug, Fits LS1/LS2/LS3/LS6/LS7
$6.99
Buy
Wish
20-12600326 
GM LS2/LS3 (Non V.V.T.) Front Cover (no sensor)
$44.99
Buy
Wish
20-12599296 
GM LS3 Valley Cover
$116.99
Buy
Wish
20-89017585 
GM LS2 Intake Manifold Gasket Set
$219.99
Buy
Wish
20-89060413 
GM LS Trucks Intake Manifold Gaskets, Fits 4.8L/5.3L/6.0L/6.2L
$101.99
Buy
Wish
20-12558178 
GM LS1 Valley Cover gasket, LS1/LS6/LS Trucks w/ non-D.O.D
$22.99
Buy
Wish
20-12610141 
GM Valley Cover Gasket, For LS2/LS3/LS7/LS9/LS Trucks w/D.O.D
$52.99
Buy
Wish
20-12610160 
GM LS3 Valley Cover O-Ring (8 Required), sold individually.
$4.49
Buy
Wish
20-11561283 
GM LS3 Single Bolt Cam Bolt
$3.49
Buy
Wish
20-12610046 
GM 6.2L Multi-Layer Steel LS3 Cylinder Head Gasket. (Sold individually)
$38.79
Buy
Wish
20-12622033 
GM 6.2L Multi-Layer Steel LS9 (7Layer) Cylinder Head Gasket. (Sold individually)
$58.99
Buy
Wish
20-12591720 
GM LS2/LS3 (Non V.V.T.) Cam Sensor
$58.99
Buy
Wish
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