These pre-bent stainless steel tailpipes are made specifically for use with Flowmaster system part# 817413 designed for headers back to the rear differential on all 1959-1964 Chevrolet Impala, Biscayne & Bel Air with V8 engine. These custom bent tailpipes are constructed from 16 gauge mandrel-bent 2.50 in. stainless steel tubing, tucks up high above the rear axle and comes with two tailpipe exits depending on the year of the vehicle. Includes clamps, hangers and necessary hardware for a clean and easy installation. Note: This system is designed for side outlet mufflers.