A pack with a leaking piston never reaches full clamp, whatever the pressure gauge says.6L80E piston 4-5-6 2015. This set returns the apply circuit to full clamping force.Bore finish is what the seal wipes against for the life of the unit. Shipping weight is 1 lb.The parts list below is exactly what ships. Compare it against your teardown before ordering.REMCO has supplied automatic transmission parts since 1991, and every order ships with its part listing so the receiving technician can check what arrived against what was ordered. Transmission Piston Kit for 6L80E - replacement component designed for proper fit and function Designed to support proper clutch apply pressure, stroke and sealing during piston and seal work Package Includes: one transmission piston kit as described, supplied loose for piston and seal work Bonded rubber lip seals on a steel or aluminum piston body - designed for dependable service in the intended application. Ships at 1.00 lb, 4.5x4.5x0.5 in Intended for builders correcting apply pressure loss. Lubricate the lip seals before assembly and seat the piston square in the bore What's in the box1 x Piston, 6L80E 6L90E 4-5-6Compatible vehiclesFits CTS-V [04-15], Escalade/ESV/EXT [07-15], SRX [06-09], STS [06-11], XLR [06-11], Camaro [10-13], Corvette [06-11], SS [14-17], Avalanche [08-13], Express 2500 [10-11], Express 3500 [10-11], Silverado 1500 1/2 Ton [07-09].