High-quality reproduction exhaust manifold heat riser repair kit with instructions for 1970-1974 383, 400, and 440 HP engines, which used a different, larger-diameter heat riser than standard manifolds. Most originals are missing, frozen, or broken; this kit includes all correctly marked pieces and detailed instructions to install in the right (passenger) side manifold, fitting 1970-1971 Cuda and Challenger E-Body cars and 1970-1974 Road Runner, GTX, Charger, Coronet R/T, and Super Bee B-Body cars.