I installed the TTi 2.5" X-pipe, Hooker Max Flow mufflers, TTi tail pipes, Classic Chambered Exhaust resonators, and Accurate R/T tips on my 70 340 Challenger over the Winter. Even though I mixed and matched my parts, the install was very smooth. The TTi X-pipe is awesome and their clamps and mounting brackets give some adjustment which helped me with my assortment of parts! TTi!!