Product Description
Michigan Motorsports LS Crankshaft Adapter / Flexplate Spacer
Fits All GM LS Engines Except LSA & 1999–2000 LQ4 | For TH350, TH400, 700R4, 4L60/4L60E, 4L80/4L80E, 4L85E
This Michigan Motorsports Crankshaft Adapter / Flexplate Spacer is designed to seamlessly adapt earlier non-LS torque converters to modern Gen III and Gen IV LS engines. Whether you're performing a drivetrain swap, converting to an older GM transmission, or correcting spacing issues, this precision-machined spacer ensures proper converter engagement, flexplate alignment, and drivetrain reliability. Constructed from high-quality steel and finished in black oxide, it delivers exceptional strength and long-term durability in both street and performance applications.
Key Features
- Perfect Converter Adaptation: Allows non-LS torque converters to properly align and engage with modern LS engines when using earlier GM transmissions.
- Correct Flexplate Spacing: For flat flexplates, the spacer installs between the crankshaft and flexplate. For dished flexplates, it installs between the flexplate and torque converter to ensure correct snout engagement.
- High-Quality Construction: CNC-machined from premium steel and coated in black oxide for corrosion resistance and long-term durability.
- Transmission Compatibility: Designed for TH350, TH400, 700R4, 4L60, 4L60E, 4L80, 4L80E, and 4L85E transmissions commonly used in LS swap projects.
- Swap-Friendly Design: Eliminates the need for slip-on converter snout adapters when running earlier non-LS converters on LS engines with dished flexplates.
Key Fitments
- Engines: Fits LS1, LS2, LS3, LS6, L99, L92, L9H, L94, L76, L77, LY6, L96, LFA, LZ1, LY5, LMG, LMF, LH6, LC9, LY2, L20, L33, LQ4, LQ9, LR4, LM7, L59, LS4, LH8, LH9 — 4.8L, 5.3L, 5.7L, 6.0L, 6.2L applications. (Does NOT fit LSA or 1999–2000 long-crank LQ4 engines.)
- Platforms: Designed for LS swap vehicles running earlier GM transmissions including TH350, TH400, 700R4, 4L60/4L60E, 4L80/4L80E, 4L85E. Suitable for trucks, SUVs, muscle cars, hot rods, and custom conversions.
- Notes: Requires longer flexplate bolts for installation — ARP Kit #244-2902 is recommended. Not required when using LS-specific torque converters with dished flexplates.
