Included Components Torsion Bar Keys. Leveling Kit Torsion Bar Keys (Forged Steel) | Adjustable 1-3″ Front Suspension Lift. Compatible with Chevrolet 1982-2005 S10 & S-10 Blazer, 1982-1991 S15. Compatible with GMC 1982-1991 S15 Jimmy, 1991-2005 Sonoma.