Product Description
Michigan Motorsports Gold Series SFI 29.1 Dished Flexplate for LS Engines
168-Tooth Starter Ring | Internal Balance | 6-Bolt Crank Flange | 11.06-Inch Converter Pattern
Upgrade the flexplate in a compatible LS-powered vehicle with the Michigan Motorsports Gold Series dished flexplate. Engineered for demanding street, drag-racing and off-road applications, this SFI 29.1-certified flexplate combines a 4mm-thick cold-rolled chromoly steel centerplate with a precision-welded 168-tooth starter ring and three-position 11.06-inch torque-converter bolt pattern.
Key Features & Benefits
- SFI 29.1 Certified Flexplate: The Gold Series flexplate is manufactured to meet SFI 29.1 specifications for demanding performance applications. Its reinforced construction makes it an excellent upgrade for compatible LS-powered street vehicles, drag-racing combinations and off-road builds.
- Cold-Rolled Chromoly Steel Construction: A 4mm-thick cold-rolled chromoly steel centerplate provides a strong foundation for the flexplate assembly. The centerplate is approximately .035 inch thicker than a stock flexplate, delivering a significant improvement in strength over the original OEM design.
- Precision-Welded 168-Tooth Ring Gear: The starter ring gear is precision welded to the centerplate using robotic machinery and a controlled cold-welding process. This manufacturing method supports consistent ring-gear placement while meeting the requirements of the flexplate’s SFI specification.
- LS 6-Bolt Internal-Balance Design: Designed for compatible internally balanced LS-based engines equipped with a six-bolt crankshaft flange. The dished configuration works with the specified GM automatic transmissions and corresponding three-bolt torque converters.
- 11.06-Inch Converter Bolt Pattern: Three torque-converter mounting positions are arranged on an 11.06-inch bolt circle. This pattern supports compatible 700R4, 4L60-series and three-bolt 6L80 torque converters while maintaining the required dished flexplate configuration.
Flexplate Specs
- Certification: SFI 29.1
- Flexplate Style: Dished
- Balance: Internal
- Crankshaft Flange Pattern: 6-Bolt LS
- Starter Ring Gear: 168-Tooth
- Converter Bolt Pattern: 3 x 11.06"
- Centerplate Material: Cold-Rolled Chromoly Steel
- Centerplate Thickness: 4mm
- Thickness Compared to Stock: .035" Thicker
- Transmission Compatibility: 700R4, 4L60, 4L60E, 4L65E, 4L70E and 6L80 with a 3-bolt torque converter
Notes
- Will not fit LSA, LS9 or 1999-2000 6.0L engine applications.
- Will not work with a TH400 or 4L80 unless using an aftermarket torque converter designed for a dished flexplate with an 11.06-inch bolt pattern.
- When using an older non-LS torque converter, Michigan Motorsports SKU 26400 or MMCRNKADPT can be used to properly space the converter snout.
Key Fitments
- Fits all LS Based Engines except LSA, LS9 and 1999-2000 6.0L
- 700R4, 4L60, 4L60E, 4L65E, 4L70E, 6L80 (with 3-bolt torque converter)
