Add to Cart Compare Centerforce Performance Twin Disc Clutch | Centerforce Dyad Drive System | 73-90 GM Truck $1,699.75 73-90 GM Truck & SUV Input shaft: 1-1/8"-10 Ring gear tooth count: 168 Ring gear outside diameter: 14.096 No complicated setup or adjustments required Fully dampened clutch system developed for vehicles with extreme power... $1,699.75 Add to Cart Compare