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Flywheels and Flexplates
TCI®

Flywheels and Flexplates

  • SFI 29.1-approved for many popular GM, Ford & Chrysler applications
  • Heavy-duty steel plate is much stronger than OEM material
  • Electro-coated & dynamically balanced with factory bolt sizes
  • Designed to prevent cracking common in high performance use
  • New flexplate additions include GM LS & Ford Modular engines

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.

ApplicationsFlexplate Shims

Part # Balance Description Engine Size Notes SFI 29.1 Trans
Late Model Flexplates - GM
399755   Dynamic OE Bolt, A36 Steel Plate LS9 Yes GM
399756   Dynamic OE Bolt, A36 Steel Plate LSA Yes GM
Late Model Flexplates - Ford Modular 4.6/5.4
529640   Dynamic 8-Bolt Crank Engine Application Ford Modular 4.6/5.4 Yes Ford
Chevy
399273   Internal Dual Bolt Pattern, 168 Tooth ALL Yes GM
399373   External Dual Bolt Pattern, 168 Tooth 400 Yes GM
399473   External Dual Bolt Pattern, 168 Tooth 454 Yes GM
399554   External Small Bolt Pattern, 153 Tooth 454 Yes GM
399173   External Small Bolt Pattern, 153 Tooth LT1 Yes GM
399174   Internal Small Bolt Pattern, 153 Tooth LT1 Yes GM
399573   Internal Small Bolt Pattern, 153 Tooth ALL Yes GM
399753   Internal Small Bolt Pattern, 168 Tooth 4.8, 5.3, 5.7, 6.0 LS-Series 2 Yes GM
399754   Internal Wide Bolt Pattern, 168 Tooth 4.8, 5.3, 5.7, 6.0 LS-Series Yes GM
399773   External Dual Bolt Pattern, 168 Tooth, Only for One Piece Rear Seal Engines '86-99 (1 pc. rear seal) Yes GM
399873   External Dual Bolt Pattern, 168 Tooth, Only for Gen. V & Gen VI 454 HO & 502 HO with Steel Forged Crankshafts 91-98 (1 pc. rear seal) Yes GM
399973   external Dual Bolt Pattern, 168 Tooth, Only for Gen. V 454 with Cast Iron Crankshafts '91-95 (1 pc. rear seal) Yes GM
Pontiac
399673   Internal Large Bolt Pattern, 166 Tooth, 2.750" Crankshaft I.D. 326-455 Yes GM
Ford
529615   0 oz. 10.5" Bolt Pattern, 157 Tooth 289-351C 351M-400M Yes Ford
529618   28 oz. 10.5" Bolt Pattern, 157 Tooth 289-351C Yes Ford
529610   50 oz. 10.5" Bolt Pattern, 157 Tooth 289-351C, 351M-400M Yes Ford
529625   0 oz. 11.5" Bolt Pattern, 164 Tooth 289-351C, 351M-400M Yes Ford
529628   28 oz. 11.5" Bolt Pattern, 164 Tooth 289-351C, 351M-400M Yes Ford
529620   50 oz. 11.5" Bolt Pattern, 164 Tooth 289-351C, 351M-400M Yes Ford
529632   Internal Dual GM Pattern, for Racing Applications Only 289-351C, 351M-400M 1 Yes GM
529742   Internal Dual GM Pattern, for Racing Applications Only 360-428-460 1 Yes GM
Chrysler
102340   External Dual Bolt Circle, 5/16" Bolt, 6 Hole Cast Crank '71 - '76 340 Yes T/F 904
102390   External Dual Bolt Circle, 5/16" Bolt, 6 Hole Cast Crank '71 - '92 360 Yes T/F 904
102350   External Dual Bolt Circle, 5/16" Bolt, 6 Hole Cast Crank '71 - '76 340 Yes T/F 727
102360   External Dual Bolt Circle, 5/16" Bolt, 6 Hole Cast Crank '71 - '92 360 Yes T/F 727
102370   External Dual Bolt Circle, 5/16" Bolt, 6 Hole Cast Crank 71 & Up 383-440 Yes T/F 727
145200   Internal Small Bolt Circle, 7/16" Bolt, 6 Hole Forged Crank 318-440 Yes All T/F
145300   Internal Small Bolt Circle, 7/16" Bolt, 8 Hole Forged Crank 426 HEMI No All T/F
145600   Internal Small Bolt Circle, 5/16" Bolt, 6 Hole Forged Crank 318-440 No All T/F
145700   Internal Large Bolt Circle, 5/16" Bolt, 6 Hole Forged Crank 318-440 No All T/F
149162   Internal Small GM Pattern, for Racing Applications Only, 6 Hole Crank All 1 Yes GM
149182   Internal Small GM Pattern, for Racing Applications Only, 8 Hole Crank All 1 Yes GM

Notes

  • 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

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