Belltech Street Performance Shock - 2 to 6 in Lowered - Twintube - Silver - Front/Rear - GM Fullsize SUV/Truck 1973-1986 4125CSMBU Shaft is used to help

Shaft is used to help align counter shaft when replacing clutch discs and clutches

User Programmable Range for Rich

Never exceed 4

1979-1991 GMC C2500

Belltech Street Performance Shock - 2 to 6 in Lowered - Twintube - Silver - Front/Rear - GM Fullsize SUV/Truck 1973-1986 4125CSMBU Shaft is used to helpStreet Performance Premium Replacement Twin Tube Gas Charged Shock Absorber Set for Lowered Truck and SUV, Set Includes 2 Front and 2 Rear Performance Tuned Shock Absorbers See Application Gude For Fitment Large 45mm body diameters and twin tube design allow for larger oil volume and better heat dissipation leading to increased shock life Large 35mm piston and valves allow greater hydraulic control during quick wheel movements and long shock travel