Speedway Motors GM 8.5 Inch 10-Bolt Steel Full Spool 30 Spline 4130 Heat Treated Alloy Construction Competition Proven Design for Drag Racing Circle Track

GM 10-Bolt Steel Full Spool, 30 Spline Spools are an alternative to a locker as traction and performance enhancement. Spools are a favorite of off road competitors, dirt track racers and drag racers. A differential with a spool set up delivers equal power and traction to both left and right side rear wheels. Spool solutions are less expensive than lockers and weigh less. We offer a full line of mini and full spools in the most popular applications for such differential modification. Features This is a steel full spool made from 4130 aircraft alloy heat treated steel. Provides Ultimate Traction In Extreme Off Road, Circle Track And Drag Strip Conditions. Bullet Proof, Competition Proven Design. Highest Quality Steel Alloys. Low Cost Posi Alternative. Easy Installation.

• 4130 Alloy Construction: Manufactured from 4130 aircraft-grade steel and heat treated for maximum strength and durability
• Full Spool Design: Delivers equal power to both rear wheels for consistent traction under demanding conditions
• High-Traction Performance: Ideal for extreme off-road use, circle track racing, and drag strip applications
• Competition Proven Strength: Bulletproof, race-tested design built to withstand high loads and aggressive driving
• Posi Alternative: Low-cost, lightweight alternative to lockers with straightforward installation for GM 8.5 inch 10-bolt differentials