Pro Series GM Gen III/IV LS Flexplate Bolt Kit
Pro Series GM Gen III/IV LS Flexplate Bolt Kit
SKU: SKU: 734-21155
In stock
Product Details
Features
- Fits Gen III/IV LS Engines: Designed for LS flexplate and flywheel mounting applications.
- 190,000 PSI Tensile Strength: Heat-treated 35 chromoly steel for dependable durability.
- Rolled Thread Construction: Provides enhanced fastener strength and fatigue resistance.
- Ideal for LS Swaps & Rebuilds: Perfect for transmission service and drivetrain assembly projects.
Description
Secure your drivetrain with the Top Street Performance Pro Series LS Flexplate Bolt Kit, engineered specifically for GM Gen III and Gen IV LS engines. Whether you're replacing worn hardware, installing a new transmission, or completing an LS swap, this LS flexplate bolt kit provides the strength and reliability needed to securely fasten the flexplate to the crankshaft in demanding street and performance applications.
Secure Flexplate Installation
Designed to provide dependable flexplate retention, these LS flexplate bolts help maintain a secure connection between the crankshaft and flexplate. Ideal for transmission replacement, engine assembly, and torque converter installation projects requiring reliable GM LS flexplate hardware.
High-Strength Performance Construction
Manufactured from heat-treated 35 chromoly steel with a minimum tensile strength of 190,000 PSI, this flexplate bolt kit is built to withstand the demands of high-performance engines and repeated drivetrain service. Rolled threads and a black oxide finish help provide long-term durability and corrosion resistance.
Designed for Gen III & Gen IV LS Engines
Engine-specific design provides compatibility with a wide range of GM LS applications, including LS1, LS2, LS3, LS6, LS7, LQ4, LQ9, LY6, L92, LS9, and compatible LSX engine builds utilizing the factory-style flexplate mounting configuration.
Ideal for LS Swaps & Transmission Service
Perfect for transmission installation, flexplate replacement, engine rebuilds, and LS swap projects where fresh LS flywheel bolts or LS crankshaft flexplate bolts are recommended. An excellent choice for maintaining secure drivetrain connections in street, performance, racing, and custom build applications.
Specs
| Torque | 3 steps, to 75 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
CHEVROLET SMALL BLOCK V8 GEN. III/IV (LS BASED)
• 4.8 L / 293 in³ (LR4, LY2, L20)
• 5.3 L / 325 in³ (LM7, L59, LM4, L33, LC9, LH6, LY5, LMG)
• 5.7 L / 346 in³ (LS1, LS6)
• 6.0 L / 364 in³ (LQ4, LQ9, LS2, L76, LY6, L96)
• 6.2 L / 376 in³ (LS3, L92, L99, L9H)
• 7.0 L / 427-428 in³ (LS7, LSX applications)
COMMON VEHICLE APPLICATIONS:
• Chevrolet Corvette LS-powered models
• Chevrolet Camaro LS-powered models
• Chevrolet Silverado and GMC Sierra LS-based V8 trucks
• Chevrolet Tahoe, Suburban, GMC Yukon, and Escalade LS-based V8 SUVs
• Pontiac GTO, Pontiac G8, and Chevrolet SS LS-powered cars
Q&A
What does this flexplate bolt kit fit?
This kit is designed for GM Gen III and Gen IV LS engine flexplate applications, including many LS1, LS2, LS3, LS6, LS7, LQ4, LQ9, LY6, L92, LS9, and LSX engine combinations.
What is a flexplate bolt?
A flexplate bolt secures the flexplate to the engine crankshaft, creating the connection between the engine and automatic transmission.
Why replace flexplate bolts?
Replacing flexplate hardware during transmission service, engine assembly, or flexplate replacement helps ensure proper retention and reliable drivetrain operation.
Are flexplate bolts the same as flywheel bolts?
Flexplate bolts and flywheel bolts serve a similar purpose by attaching rotating drivetrain components to the crankshaft, but application requirements may vary depending on the transmission and engine combination.
Is this kit suitable for performance applications?
Yes. The hardware is manufactured from heat-treated 35 chromoly steel with a minimum tensile strength of 190,000 PSI for demanding street and performance use.
Can this kit be used for an LS swap?
Yes. This LS flexplate bolt kit is ideal for LS swap projects, transmission installations, and drivetrain upgrades requiring fresh mounting hardware.
What material are the bolts made from?
The bolts are manufactured from premium 35 chromoly steel and feature rolled threads with a black oxide finish for durability and corrosion resistance.
Does this kit include corrosion protection?
Yes. The black oxide finish and protective oil coating help resist rust and corrosion.
Emissions Notice
This product does not affect vehicle emissions and is not subject to emissions compliance regulations.
Pro Series GM Gen III/IV LS Flexplate Bolt Kit
Secure your drivetrain with the Top Street Performance Pro Series LS Flexplate Bolt Kit, engineered specifically for GM Gen III and Gen IV LS engines. Whether you're replacing worn hardware, installing a new transmission, or completing an LS swap, this LS flexplate bolt kit provides the strength and reliability needed to securely fasten the flexplate to the crankshaft in demanding street and performance applications.
Secure Flexplate Installation
Designed to provide dependable flexplate retention, these LS flexplate bolts help maintain a secure connection between the crankshaft and flexplate. Ideal for transmission replacement, engine assembly, and torque converter installation projects requiring reliable GM LS flexplate hardware.
High-Strength Performance Construction
Manufactured from heat-treated 35 chromoly steel with a minimum tensile strength of 190,000 PSI, this flexplate bolt kit is built to withstand the demands of high-performance engines and repeated drivetrain service. Rolled threads and a black oxide finish help provide long-term durability and corrosion resistance.
Designed for Gen III & Gen IV LS Engines
Engine-specific design provides compatibility with a wide range of GM LS applications, including LS1, LS2, LS3, LS6, LS7, LQ4, LQ9, LY6, L92, LS9, and compatible LSX engine builds utilizing the factory-style flexplate mounting configuration.
Ideal for LS Swaps & Transmission Service
Perfect for transmission installation, flexplate replacement, engine rebuilds, and LS swap projects where fresh LS flywheel bolts or LS crankshaft flexplate bolts are recommended. An excellent choice for maintaining secure drivetrain connections in street, performance, racing, and custom build applications.
COMPATIBLE WITH
CHEVROLET SMALL BLOCK V8 GEN. III/IV (LS BASED)
• 4.8 L / 293 in³ (LR4, LY2, L20)
• 5.3 L / 325 in³ (LM7, L59, LM4, L33, LC9, LH6, LY5, LMG)
• 5.7 L / 346 in³ (LS1, LS6)
• 6.0 L / 364 in³ (LQ4, LQ9, LS2, L76, LY6, L96)
• 6.2 L / 376 in³ (LS3, L92, L99, L9H)
• 7.0 L / 427-428 in³ (LS7, LSX applications)
COMMON VEHICLE APPLICATIONS
• Chevrolet Corvette LS-powered models
• Chevrolet Camaro LS-powered models
• Chevrolet Silverado and GMC Sierra LS-based V8 trucks
• Chevrolet Tahoe, Suburban, GMC Yukon, and Escalade LS-based V8 SUVs
• Pontiac GTO, Pontiac G8, and Chevrolet SS LS-powered cars
SPECIFICATIONS
Torque: 3 steps, to 75 ft-lbs
Color: Black
Fastener Style: Bolt
Grade: Performance
Head Style: 12-point
Material: 35 Chromoly Steel
Quantity: Sold as a kit
