Heavy Duty Flywheels and Flexplates

For Chevrolet...TCI® flywheels are .035" thicker than stock and the starter ring is welded to both sides of the flywheel for additional strength. Constructed from a high tensile strength material these flywheels resist elongation and cracking. All 168 tooth flywheels have dual GM bolt patterns and are sized for stock ³/₈" mounting bolts and can be easily drilled for ⁷/₁₆" diameter high performance torque converter applications. SFI 29.1 approved.

For Pontiac...this aftermarket flywheel is .140" thick and built to handle even the toughest application. SFI 29.1 approved. Constructed from A514 material and neutral balanced. 166 tooth starter ring.

For Chrysler...we offer stock replacement heavy duty flexplates for all the popular styles of Chrysler flexplates as well as special counter balanced flexplates which allow you to use a neutral balance torque converter in cast crank applications that came with a counter balanced torque converter. In addition we offer a complete line of SFI 29.1 approved flywheels for use in Chrysler to GM adapter applications.

For Ford...we offer OEM-style small block Ford flexplates that are constructed to exacting standards and are SFI 29.1 approved. Built extra-thick with welds on both sides of the ring gear. These flexplates are precision balanced and checked for runout.

We also have a complete line of .140" thick Ford flywheels with both GM and Ford bolt pattern. Constructed from A514 material these SFI 29.1 approved flywheels work with all Ford engine to Chevy GM TCI® adapter kits and are suitable for Ford seven, eight, nine, and ten inch Competition converters also.

Due to the flat design as opposed to the dished construction of stock Ford flywheels, these flywheels will not work with stock replacement torque converters.

Engine Make	SFI 29.1 Approved	Trans Type	Engine Size	Balance	Remarks	Part No.
Chevy	Y	GM	ALL	internal	dual bolt pattern, 168 tooth	399273
Chevy	Y	GM	400	external	dual bolt pattern, 168 tooth	399373
Chevy	Y	GM	454	external	dual bolt pattern, 168 tooth	399473
Chevy	Y	GM	454	external	small bolt pattern, 153 tooth	399554
Chevy	Y	GM	LT1	external	small bolt pattern, 153 tooth	399173
Chevy	Y	GM	LT1	internal	small bolt pattern, 153 tooth	399174
Chevy	Y	GM	ALL	internal	small bolt pattern, 153 tooth	399573
Chevy	Y	GM	4.8, 5.3, 5.7, 6.0 LS-series	internal	small bolt pattern, 168 tooth	3997532
Chevy	Y	GM	4.8, 5.3, 5.7, 6.0 LS-series	internal	wide bolt pattern, 168 tooth	399754
Chevy	Y	GM	'86-99 (1 pc. rear seal)	external	dual bolt pattern, 168 tooth, only for one piece rear seal engines	399773
Chevy	Y	GM	'91-98 (1 pc. rear seal)	external	dual bolt pattern, 168 tooth, only for Gen. V & Gen VI 454 HO & 502 HO with steel forged crankshafts	399873
Chevy	Y	GM	'91-95 (1 pc. rear seal)	external	dual bolt pattern, 168 tooth, only for Gen. V 454 with cast iron crankshafts	399973
Pontiac	Y	GM	326-455	internal	large bolt pattern, 166 tooth, 2.750" crankshaft ID.	399673
Ford	Y	Ford	289-351C 351M-400M	0 oz.	10.5" bolt pattern, 157 tooth	529615
Ford	Y	Ford	289-351C 351M-400M	28 oz.	10.5" bolt pattern, 157 tooth	529618
Ford	Y	Ford	289-351C 351M-400M	50 oz.	10.5" bolt pattern, 157 tooth	529610
Ford	Y	Ford	289-351C 351M-400M	0 oz.	11.5" bolt pattern, 164 tooth	529625
Ford	Y	Ford	289-351C 351M-400M	28 oz.	11.5" bolt pattern, 164 tooth	529628
Ford	Y	Ford	289-351C 351M-400M	50 oz.	11.5" bolt pattern, 164 tooth	529620
Ford	Y	GM	289-351C 351M-400M	internal	dual GM pattern, for racing applications only	5296321
Ford	Y	GM	360-428-460	internal	dual GM pattern, for racing applications only	5297421
Chrysler	Y	T/F 904	'71 - '76 340	external	dual bolt circle, 5/16" bolt, 6 hole cast crank	102340
Chrysler	Y	T/F 904	'71 - '92 360	external	dual bolt circle, 5/16" bolt, 6 hole cast crank	102390
Chrysler	Y	T/F 727	'71 - '76 340	external	dual bolt circle, 5/16" bolt, 6 hole cast crank	102350
Chrysler	Y	T/F 727	'71 - '92 360	external	dual bolt circle, 5/16" bolt, 6 hole cast crank	102360
Chrysler	Y	T/F 727	'71 & up 383-440	external	dual bolt circle, 5/16" bolt, 6 hole cast crank	102370
Chrysler	Y	All T/F	318-440	internal	small bolt circle, 7/16" bolt, 6 hole forged crank	145200
Chrysler	N	All T/F	426 HEMI	internal	small bolt circle, 7/16" bolt, 8 hole forged crank	145300
Chrysler	N	All T/F	318-440	internal	small bolt circle, 5/16" bolt, 6 hole forged crank	145600
Chrysler	N	All T/F	318-440	internal	large bolt circle, 5/16" bolt, 6 hole forged crank	145700
Chrysler	Y	GM	All	internal	small GM pattern, for racing applications only, 6 hole crank	1491621
Chrysler	Y	GM	All	internal	small GM pattern, for racing applications only, 8 hole crank	1491821

¹ These SFI Flywheels are all neutral balance units designed for internally balanced engine applications. Adapter Flywheels only work in conjunction with TCI adapter kits. They cannot be used as OEM replacements.
² Will not fit 4L80E transmissions.

Chevrolet Flywheel Shims
These shims are an easy way to achieve optimum spacing when installing a new flywheel on Chevrolet crankshafts. These 0.030" shims manufactured from high quality steel, are a must when additional clearance is required between the starter and flywheel ring gear. Works on both automatic and standard shift flywheels with standard Chevrolet crankshaft bolt flange and flywheel.

Description	Part No.
Chevrolet Flywheel Shims	399100