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12 Bolt Truck Street Gears, 4 Series Carrier
Category: Ring & Pinion Sets
Part Number(s): 8620 12 Bolt Truck 4 Series
Gears Are for a 4 Series Carrier! '64-'82 C10/K10/K20, Blazer, G10/G20 Van 1.437" dia. pinion stem, 30 spline pinion. 5.38 Ratio Requires Special Cross-Pin 80-0269 These Gears are manufactured from 8620 alloy and used primarily for street, oval track, and lightweight drag racing applications. Gears are designed to provide excellent service life, but are suceptible to high shock loads.
Price: $216.62
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12 Bolt GM Truck Installation Kit
Part Number(s):  83-1018
Installation kit contains all the parts required for a complete ring and pinion installation, including pinion and carrier shims, pinion seal, crush sleeve or preload shims, ring gear bolts, pinion nut and washer, and cover gasket along with gear marking
Price: $122.96
Special GM 12 Bolt Cross Pin
Part Number(s):  80-0269
12 Bolt Posi (for 5.14 to 6.14 ratios with stock c-clip axles)
Price: $39.38