Manufactured by Belltech | 8521 | 1999-06 Siverado/Sierra 4wd front Lowering Shocks, 99-06 GM 1500 4wd Nitro drop 2 front shocks. These shocks only fit trucks with torsion bar front suspension., Belltech designed the Nitro Drop 2 shock line to provide the Truck and SUV market with a unique blend of shock tuning. This new setup concentrates on the Comfort level while also increasing the overall performance of the complete suspension system. Designed with the daily driver Truck and SUV customer in mind, Belltech Engineers increased the low speed compression and massaged the rebound forces of the shock valving providing a factory style ride comfort while providing better road feel and grip. The Nitro Drop 2 line features application specific shortened bodies to match with the different lowering methods, ensuring you have the correct amount of shock travel for any of our Belltech Lowering Kits and Components. Mid Shocks BT 8504Mid Shocks BT 8504 SHOCK FEATURES Metal dust boot Hardened Chrome 12.5mm piston rod Triple lip NBR rod seal Teflon guide bushing NEW 30mm piston with low friction piston Teflon seal NEW Performance rebound valve design 45mm wide body for increased oil volume NEW 35mm performance compression valve Reinforced OEM quality rubber bushings Product information updated on 2024-07-04. This product can ship by Small Parcel