Competition Cams 818-1 Features: Superior Performance Superior Durability Special Patented Design Race Proven Heat Treated Axle Small Base Circle Edge Orifice Type Oil Metering 1 Year Limited Warranty Height: 0.75 Width: 4.00 Length: 6.00 Weight: 0.26 lbs Fitment: 2003/Chevrolet/Silverado 1500/WT Standard Cab Pickup 2-Door/4.3L 262Cu. In. V6 GAS OHV Naturally Aspirated::Not Legal For Sale Or Use On Pollution-Controlled Motor Vehicle^^2003/Chevrolet/Silverado 1500/LT Extended Cab Pickup 4-Door/4.3L 262Cu. In. V6 GAS OHV Naturally Aspirated::Not Legal For Sale Or Use On Pollution-Controlled Motor Vehicle^^2003/Chevrolet/Silverado 1500/LS Standard Cab Pickup 2-Door/4.3L 262Cu. In. V6 GAS OHV Naturally Aspirated::Not Legal For Sale Or Use On Pollution-Controlled Motor Vehicle^^2003/Chevrolet/Silverado 1500/LS Extended Cab Pickup 4-Door...