Hotchkis Sport Suspension 2409C 1974-1981 Pontiac Firebird Sport Lowered Leaf Spring kit with a 1.5 inch Drop designed in. The best leaf spring replacement. Lower your 1974-1981 Pontiac Firebird, and reduce roll and increase handling with our 1.5 in. lowered Sport Leaf Spring. Our Sport chevy leaf springs represent the latest technology in leaf spring suspension geometry performance spring and uses the highest quality leaf spring material. Our springs utilize a 3/4 length overload spring reducing axle wrap and feature urethane rear bushings and rubber front bushings offering both performance and comfort. Included are heavy duty shackles, High grade U-bolts for leaf springs, spring pads and new "GM" style nut clips. The most complete kit in the market, leaf spring parts all included. Our sport leaf springs are designed to work on both single leaf spring and Multi Leaf equipped vehicles. Lowers vehicle 1.5 in. from original ride height. No need to add a leaf to your old worn-out leaf springs or figure out types of leaf spring, get the right application of leaf spring by Hotchkis. Spring Rates: 150-180 Variable Rate. If you own a 1970-1973 Pontiac Firebird, or 1970 - 1980 Camaro use part number 2408C.