GM / Chevy 4200 Vortec / Atlas SFI Flywheel

Our SFI GM 4200 flywheel is drilled to work with 10 & 10.50" GM, Chrysler & Ford Diaphragm clutch packages. This flywheel weighs roughly 13.5#'s 

This flywheel is designed to work with our Starter adapter and an adapter plate.

These are not specifically designed to put an AR5 behind your 4200. It may work but we can not guarantee that fitment. 

Designed to work with:
GM V8 manual transmissions (T56, TR6060, TKO, TKX, T5 + more) 
Ford V6 Ecoboost MT82, SBF V8 Manual Transmission
Chrysler Manual V8 with an LA bellhousing pattern (including Gen 3 Hemi)

Estimated delivery is currently September 30th, 2025.

Please let us know if you have any additional questions.