BTR Crank Gear - Aftermarket Gen III/IV LS Crankshaft In OEM Gen V Block - Chamfered End And I.D. Grind - BTR31217. Sold as described below; installation labor and tuning are not included.
The BTR31217 Crank Gear is the ultimate problem-solver for custom cross-generation engine builds.Engineered by Brian Tooley Racing, this specialty crank gear allows you to seamlessly install a high-performance aftermarket Gen III/IV LS crankshaft into an OEM Gen V engine block
Why You Need It Interchanging OEM and aftermarket components between Gen III/IV and Gen V setups introduces two significant geometric roadblocks at the crankshaft snout:
The Fillet Radius Conflict: Factory cranks use a rolled fillet, allowing standard gears to sit flat. High-performance aftermarket cranks typically feature a larger, 3mm (.125”) conventional fillet radius for added strength. Standard crank sprockets will bind on this radius, placing them under extreme pressure until they eventually split under high RPM.
- Manufacturer part number: BTR31217
- Brand: Brian Tooley Racing
- Part Type: Crank Gear
Shipping: Lower-48 ground shipping is $19.99 per order. Use CAMSHIP199 for free cam-parts ground shipping on orders of $199 or more. Free shop pickup is available after your order is confirmed ready.
BTR Crank Gear - Aftermarket Gen III/IV LS Crankshaft In OEM Gen V Block - Chamfered End And I.D. Grind - BTR31217. Sold as described below; installation labor and tuning are not included.
The BTR31217 Crank Gear is the ultimate problem-solver for custom cross-generation engine builds.Engineered by Brian Tooley Racing, this specialty crank gear allows you to seamlessly install a high-performance aftermarket Gen III/IV LS crankshaft into an OEM Gen V engine block
Why You Need It Interchanging OEM and aftermarket components between Gen III/IV and Gen V setups introduces two significant geometric roadblocks at the crankshaft snout:
The Fillet Radius Conflict: Factory cranks use a rolled fillet, allowing standard gears to sit flat. High-performance aftermarket cranks typically feature a larger, 3mm (.125”) conventional fillet radius for added strength. Standard crank sprockets will bind on this radius, placing them under extreme pressure until they eventually split under high RPM.
- Manufacturer part number: BTR31217
- Brand: Brian Tooley Racing
- Part Type: Crank Gear
Shipping: Lower-48 ground shipping is $19.99 per order. Use CAMSHIP199 for free cam-parts ground shipping on orders of $199 or more. Free shop pickup is available after your order is confirmed ready.
Image 1 of 1