MANUAL TRANSMISSION FLYWHEEL

PART NUMBER	MATERIAL	RING GEAR	UNBALANCE	APPLICATION
M-6375-A302B 1	Billet Steel	157-tooth	28.2 oz.-in.	Pre-1981 302 engines and 351 engines using 157T flywheels. Meets SFI 1.1.
M-6375-A302AB 1 3	Aluminum	157-tooth	28.2 oz.-in.	Pre-1981 302 engines and 351 engines using 157T flywheel. Reduced rotating mass for faster engine acceleration in race applications. Meets SFI 1.1.
M-6375-B302 1	Cast Iron	157-tooth	50.0 oz.-in.	1981 and later 302 engines. Exact replacement for 1986-95 Mustang stock unit.
M-6375-C302B 1	Billet Steel	157-tooth	50.0 oz.-in.	1981 and later 302 engines. Meets SFI 1.1.
M-6375-C302AB 1 3	Aluminum	157-tooth	50 oz.-in.	1981 and later 5.0L/302 engines. Reduced rotating mass for faster engine acceleration in race applications. Meets SFI 1.1.
M-6375-D302B 1	Billet Steel	157-tooth	0 oz.-in.	All small blocks with 0 unbalance rotating assemblies. Meets SFI 1.1.
M-6375-D46A (6-bolt) 1 2 4	Nodular Iron	164-tooth	0 oz.-in.	4.6L SOHC Mustang. Has increased RPM capability over stock cast iron flywheel.
M-6375-F46 (6-bolt) 1 2 4	Billet Steel	164-tooth	0 oz.-in.	4.6L SOHC Mustang. Has increased RPM capability over stock cast iron or M-6475-D46 nodular iron flywheel. Meets SFI 1.1. Fits 10.5” and 11” clutch.
M-6375-G46 (8-bolt) 1 2 4	Billet Steel	164-tooth	0 oz.-in.	4.6L SOHC Mustang GT/DOHC Mustang Cobra. Has increased RPM capability over stock Cobra flywheel. Fits 10.5" and 11" clutch. Meets SFI 1.1.
M-6375-Z460	Billet Steel	176-tooth	24.2 oz.-in.	Fits 1979-97 460 including M-6007-C460/D460/A514/D514. For external balance only. 11” long or diaphram-style clutch with 5/16” holes. 11.5” and 12” long or diaphram-style clutch. 11” diaphram Ford Trucks even pattern. Meets SFI 1.1.
M-6375-R00 4	Aluminum	164-tooth	0 oz.-in.	Used on the 2000 Cobra “R” Mustang. Fits Cobra 4.6L/5.4L DOHC 4-valve engines and other Mustangs with 8-bolt crank. Reduced rotating mass for faster engine acceleration in race applications. Fits 10.5" and 11" clutch. Meets SFI 1.1.
M-6375-J46A (8-bolt) 4	Nodular Iron	164-tooth	0 oz.-in.	Used in M-7060-C46. Works with an 11" clutch.

NOTES: ¹ Diaphragm clutch uses metric bolts and dowel pins. Requires metric pressure plate bolts N602549-S51M and alignment dowel pins D1FZ-6397-B. Ford Racing kit M-6397-A302. ² 4.6L engines may have 6 or 8 bolts to attach to the crankshaft. Check the engine code before ordering. Romeo built engines have 6 bolts and Windsor built engines have 8 bolts. All Cobra engines have 8 bolts. The 8th character in the VIN is (X) for Windsor engine plant or (W) for Romeo engine plant. ³ Has bolt-on counterweight 4" long for A302AB, 7.2" long for C302AB. ⁴ Requires bolt and dowel kit M-6397-A46 for 11" clutch applications.