LS BLOCK ENGINE FLYWHEELS
12571611
1997–up
- Outside Diameter: 14"
- Crank Flange Bolt Pattern: 6-bolt LS pattern; 3.110" (79mm)
- Converter Bolt Pattern Diameter: 11.5" Single Disc
- Starter Ring Gear Teeth: 168
- Flywheel used for LS engines with 6-bolt crankshaft flange
24240678
2009–up
- Outside Diameter: 14"
- Crank Flange Bolt Pattern: 8-bolt
- Converter Bolt Pattern Diameter: 9.5" Dual Disc
- Starter Ring Gear Teeth: 168
- LSA Production Dual Mass with 8-bolt crankshaft flange
- Also fits LSX454
12598613
2009–up
- Outside Diameter: 14"
- Crank Flange Bolt Pattern: 9-bolt
- Converter Bolt Pattern Diameter: 10" Dual Disc
- Starter Ring Gear Teeth: 168
- LS9 Production with 9-bolt crankshaft flange
LS ENGINE FLEXPLATES
12654640
1997–up
- Outside Diameter: 14"
- Crank Flange Bolt Pattern: 6-bolt LS pattern 3.110" (79mm)
- Converter Bolt Pattern Diameter: 11.062" (281mm)
- Starter Ring Gear Teeth: 168
- Flexplate used for LS engines
- Fits stock LS-4L60 family torque converter
19260102
1997–up
- Outside Diameter: 14"
- Crank Flange Bolt Pattern: 6-bolt LS pattern 3.110" (79mm)
- Converter Bolt Pattern Diameter: 11.5" (292.1mm)
- Starter Ring Gear Teeth: 168
- Flexplate only used together with Spacer 12563532 and Bolts 19257940 (4L80 family)
12636325
2009–up
- Outside Diameter: 14"
- Crank Flange Bolt Pattern: 8-bolt
- Converter Bolt Pattern Diameter: 11.062" (281mm)
- Starter Ring Gear Teeth: 168
- LSA Production Flexplate
- Also fits LSX-454
19125691
2009–up
- Outside Diameter: 14"
- Crank Flange Bolt Pattern: 8-bolt
- Converter Bolt Pattern Diameter: 11.5" (292.1mm)
- Starter Ring Gear Teeth: 168
- Modified LSA 12636325 Flexplate (see above) for use in flywheel kit 19125597
12620099
2014–up
- Outside Diameter: 14"
- Crank Flange Bolt Pattern: 8-Bolt LS/LT pattern
- Converter Bolt Pattern Diameter: 11.062" (281mm)
- Starter Ring Gear Teeth: 168
- Production Gen V truck flexplate
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