This system was designed as a part of a complete LS1 conversion kit for 1968-72 GM A-Body vehicles. Although designed for use with Edelbrock headers 350-65073 and LS1 engine mount kit 350-6701, it can also be adapted to fit other application headers. Constructed from 2-1/2" 409 stainless steel tubing with an X-pipe assembly, it includes a pair of SDT mufflers 350-55733 and a pair of polished stainless steel tips 350-5582. Fits 1968-72 2-Door GM A-Body vehicles(Chevelle, Malibu, El Camino, Skylark, Special, GS-350, GS-455, Cutlass, 422, Le Mans, Tempest, GTO, and Sprint)