Pro Series GM Gen III/IV LS Rear Main Seal Housing 12-Point Bolt Kit
Pro Series GM Gen III/IV LS Rear Main Seal Housing 12-Point Bolt Kit
SKU: SKU: 734-21168
In stock
Product Details
Features
- 35 chromoly bolts secure the rear main seal housing to the block
- 12-point head design for reliable socket engagement during installation
- Fits GM Gen III/IV LS engines: 4.8L, 5.3L, 5.7L, 6.0L, 6.2L
- 25 ft-lb torque spec; washers included for proper seating
Description
Secure your rear main seal housing with this Pro Series bolt kit, engineered for dependable retention on GM Gen III and Gen IV LS engines. Manufactured from 35 chromoly steel with a black oxide finish, these 12-point bolts hold the rear cover/rear main seal housing firmly against the block during engine assembly, rebuilds, or rear main seal replacement.
Compatible with a wide range of LS engine combinations, including LS1, LS2, LS3, LS6, LQ4, LQ9, LY6, L76, and L92, among other Gen III/IV LS applications. Torque spec is 25 ft-lbs. Washers are included for proper seating against the housing.
Applications
Fits GM Gen III/IV LS Series V8: 4.8L/293 in³ (LR4, LY2), 5.3L/325 in³ (LM7, L59, L33, LC9, LH6, LY5, LMG), 5.7L/346 in³ (LS1, LS6), 6.0L/364 in³ (LQ4, LQ9, LS2, LY6, L76, L96), 6.2L/376 in³ (LS3, L92, L99, LSA, L9H, L94). Common on Chevrolet Silverado/GMC Sierra, Camaro/Corvette, Tahoe/Suburban/Yukon (LS equipped), and Pontiac GTO/G8 applications.
Installation
Use during rear main seal replacement, rear cover installation, or full engine assembly/rebuild. Not compatible with Gen I Small Block Chevy, Gen V LT direct-injection, or Big Block Chevy engines. Torque to 25 ft-lbs.
Specs
| Torque | 25 ft-lbs |
| Color | Black |
| Fastener Style | Bolt |
| Grade | Performance |
| Head Style | 12-point |
| Material | 35 Chromoly Steel |
| Quantity | Sold as a kit |
Engine Fitment
COMPATIBLE WITH
GM LS SERIES V8 ENGINES / REAR MAIN SEAL HOUSING
• 4.8L / 293 in³ (LR4, LY2)
• 5.3L / 325 in³ (LM7, L59, L33, LC9, LH6, LY5, LMG)
• 5.7L / 346 in³ (LS1, LS6)
• 6.0L / 364 in³ (LQ4, LQ9, LS2, LY6, L76, L96)
• 6.2L / 376 in³ (LS3, L92, L99, LSA, L9H, L94)
NOTES
• Designed for GM Gen III/IV LS-based engines.
• Secures the rear main seal housing (rear cover) to the block.
• Verify rear cover/housing style matches your specific engine build before installation.
• Not compatible with Gen I Small Block Chevy, Gen V LT direct-injection, or Big Block Chevy engines.
COMMON VEHICLE APPLICATIONS
Chevrolet Silverado / GMC Sierra (LS equipped)
Chevrolet Camaro / Corvette (LS equipped)
Chevrolet Tahoe / Suburban / Yukon (LS equipped)
Pontiac GTO / G8 (LS equipped)
Q&A
What does this bolt kit attach?
This kit secures the rear main seal housing, or rear cover, to the engine block. It is not a camshaft sprocket bolt kit.
What torque spec should I use for these bolts?
25 ft-lbs. Follow the proper tightening sequence and use the lubricant specified for the fasteners.
Does this kit include washers?
Yes. Washers are included.
Will this fit an LS1 Camaro?
Yes. The 5.7L LS1 is covered under compatible Gen III LS applications.
Will this fit a 6.0L Silverado engine?
Yes, for compatible Gen III/IV 6.0L LS-based engines, including LQ4, LQ9, LY6, L76, and L96 applications.
What material are these bolts made from?
35 chromoly steel with a black oxide finish and 12-point heads.
Will this fit a Gen V LT engine?
No. This kit is designed for Gen III/IV LS engines and is not compatible with Gen V LT direct-injection engines, Gen I Small Block Chevy, or Big Block Chevy engines.
Emissions Notice
This product does not affect vehicle emissions and is not subject to emissions compliance regulations.
Pro Series GM Gen III/IV LS Rear Main Seal Housing 12-Point Bolt Kit
Secure your rear main seal housing with this Pro Series bolt kit, engineered for dependable retention on GM Gen III and Gen IV LS engines. Manufactured from 35 chromoly steel with a black oxide finish, these 12-point bolts hold the rear cover/rear main seal housing firmly against the block during engine assembly, rebuilds, or rear main seal replacement.
Compatible with a wide range of LS engine combinations, including LS1, LS2, LS3, LS6, LQ4, LQ9, LY6, L76, and L92, among other Gen III/IV LS applications. Torque spec is 25 ft-lbs. Washers are included for proper seating against the housing.
Applications
Fits GM Gen III/IV LS Series V8: 4.8L/293 in³ (LR4, LY2), 5.3L/325 in³ (LM7, L59, L33, LC9, LH6, LY5, LMG), 5.7L/346 in³ (LS1, LS6), 6.0L/364 in³ (LQ4, LQ9, LS2, LY6, L76, L96), 6.2L/376 in³ (LS3, L92, L99, LSA, L9H, L94). Common on Chevrolet Silverado/GMC Sierra, Camaro/Corvette, Tahoe/Suburban/Yukon (LS equipped), and Pontiac GTO/G8 applications.
Installation
Use during rear main seal replacement, rear cover installation, or full engine assembly/rebuild. Not compatible with Gen I Small Block Chevy, Gen V LT direct-injection, or Big Block Chevy engines. Torque to 25 ft-lbs.
COMPATIBLE WITH
GM LS SERIES V8 ENGINES / REAR MAIN SEAL HOUSING
• 4.8L / 293 in³ (LR4, LY2)
• 5.3L / 325 in³ (LM7, L59, L33, LC9, LH6, LY5, LMG)
• 5.7L / 346 in³ (LS1, LS6)
• 6.0L / 364 in³ (LQ4, LQ9, LS2, LY6, L76, L96)
• 6.2L / 376 in³ (LS3, L92, L99, LSA, L9H, L94)
NOTES
• Designed for GM Gen III/IV LS-based engines.
• Secures the rear main seal housing (rear cover) to the block.
• Verify rear cover/housing style matches your specific engine build before installation.
• Not compatible with Gen I Small Block Chevy, Gen V LT direct-injection, or Big Block Chevy engines.
COMMON VEHICLE APPLICATIONS
Chevrolet Silverado / GMC Sierra (LS equipped)
Chevrolet Camaro / Corvette (LS equipped)
Chevrolet Tahoe / Suburban / Yukon (LS equipped)
Pontiac GTO / G8 (LS equipped)
SPECIFICATIONS
Torque: 25 ft-lbs
Color: Black
Fastener Style: Bolt
Grade: Performance
Head Style: 12-point
Material: 35 Chromoly Steel
Quantity: Sold as a kit
