Nitro Gear and Axle Spools and Mini Spools are the unit of choice for drag racing and hardcore off-road use. The no-frills design of the spool features no moving parts and provides 100 percent traction to both tires at all times. When traction and strength can not be compromised, Nitro spools will not let you down. Precision manufactured from the highest quality materials, using state-of-the-art machining and heat treating process.
Details:

• GM 8.875 Inch 12 Bolt, 12P, 30 Spline, 4 Series, Nitro Full Steel Spool
• 100 Percent Traction - 100 Percent Of The Time
• Differential: GM 8.875 Inch
• Gear Ratio: 4.10 and Up
• Axle Splines: 30
• Material: Steel
• Ring Gear Bolts: 12 (Not Included)
• Manufacturer: Nitro Gear and Axle
• Warranty: Lifetime
• Sold As Each

Fits Vehicles:

• GM Cars w/GM 8.875 Inch, 12 Bolt, 12P Diff (4.10 and Up) w/30 Spline Axles