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![Pro-Race Ring and Pinion for GM Car 12-Bolt [4.88 Ratio]](https://www.jegs.com/images/mini_750/500/555/555-60066.jpg)
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GM 12-Bolt
Pro-Race Ring & PinionGM Car 12-Bolt 4.88 Ratio 30-Spline Pinion 39-8 Teeth High Strength 9310 Alloy Steel Not For Street Use
Includes: RTV Silicone Thread Locker Sealant Marking Compound w/ Brush
Includes:
JEGS 60066 Pro-Race Ring & Pinion Gear Set Features:
- 8.875 in. Ring Gear O.D.
- 1.625 in. Pinion Shaft O.D.
- Lightweight, high-quality heat-treated 9310-grade steel
- Absorbs high impacts
- Will fit 4.10:1 and numerically higher series carriers
Also Available: JEGS Ring & Pinion Set Up Tool Kit
Extreme-Use Ring & Pinions
JEGS Pro-Race Performance Ring and Pinion Gear Sets feature a lightweight heat-treated, 9310-grade steel construction, giving you an extra advantage on your lap times. Specifically designed for racing and off-road use, our gear sets are fabricated to withstand the harshest conditions, and JEGS rigid quality-control processes will ensure that you get the most performance out of your high-horsepower racing engine.
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Part TypeRing and Pinion
Product LineJEGS Pro-Race Ring & Pinion Gear Sets
BrandJEGS
Package Height5.0
Package Width11.0
Package Length15.0
Weight15.265 PG
Part CategoryPerformance Parts
Ring Gear RotationStandard
Pinion Gear Teeth8
Differential Case Design TypeGM 8.875 (Car)
Carrier Series4
QuantitySold as a set
Pinion Spline Count30
Ring Gear Diameter8.875 in (225.4 mm)
Ring And Pinion Ratio4.88:1
Pinion Shaft Diameter1.625 in (41.3 mm)
Installation Kit IncludedNo
Ring Gear Bolts12
Cover Bolts12
Ring Gear Teeth39
Part FitmentSemi Universal
Package Qty1
Package TypeEA
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