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 399753 2 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 529632 1 Ford Y GM 360-428-460 internal dual GM pattern, for racing applications only 529742 1 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 149162 1 Chrysler Y GM All internal small GM pattern, for racing applications only, 8 hole crank 149182 1

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.

Description	Part No.
Chevrolet Flywheel Shims	399100