key_features">Key Features

Lightened billet steel construction reduces rotating mass for faster engine response
Externally balanced for Chevy 454 big block applications
153 tooth ring gear (12.835" diameter) - requires straight-bolt pattern starter
11-5/8" clutch bolt pattern accepts 10.5" and 11" clutch assemblies
Six-bolt crankshaft mounting with 7/16" bolt pattern
3/8" pressure plate bolt size for broad clutch compatibility
25 lb flywheel weight balances performance with streetability
Made in the USA

Description

When you're building a performance 454 that needs to rev quickly and respond instantly, rotating mass becomes the enemy. This lightened billet steel flywheel delivers reduced inertia for Chevy 454 big block engines while maintaining the durability that high-performance applications demand. The lightened billet steel construction sheds unnecessary weight without sacrificing structural integrity or heat dissipation capability.

The 153 tooth ring gear configuration offers distinct packaging advantages over the larger 168 tooth design. At 12.835" diameter versus 14.086", the smaller ring gear reduces rotational inertia and enables faster engine acceleration between shifts. Note that 454 engines did not use 153 tooth flywheels from the factory - this configuration is designed for builds with internally balanced aftermarket crankshafts or engines that have been drilled for the straight-bolt starter pattern required by the 153 tooth ring gear. Verify your block's starter bolt pattern before ordering.

Machined from billet steel, this flywheel combines the weight reduction benefits of a lightened design with steel's superior heat management and durability compared to aluminum alternatives. The 11-5/8" clutch bolt pattern provides flexibility to run either 10.5" or 11" clutch assemblies depending on your power goals. Six-bolt crankshaft attachment with 7/16" bolts ensures secure mounting, while the 3/8" pressure plate bolt size maintains compatibility with most performance clutches.

At 25 lbs, this flywheel strikes an optimal balance between reduced rotating mass and real-world drivability - light enough to improve throttle response and rev speed, yet substantial enough to maintain smooth engagement and street manners. Precision machined in the USA for exact fitment. [VERIFY: Confirm rear main seal compatibility - 2-piece or 1-piece - and crank register diameter for this specific SKU]

Kit Includes

One lightened billet steel flywheel with 153 tooth ring gear
Externally balanced for Chevy 454 applications

Lightened Billet Steel Flywheel | Chevy 454 | 153 Tooth | External Balance

Specifications

Ratings and Reviews