Mufflers and Cat Back systems for your Jeep. Dynomax offers the widest selection of performance mufflers on the market. With a muffler for every performance application, Dynomax has it all — sound, performance and durability. Stainless Ultras Flow Muffler Regular price: $199.50 Sale price: $149.95 Cat Back System for YJ Regular price: $199.50 Sale price: $168.95 Cat-Back exhaust system 97-99 4.0L TJ Regular price: $215.50 Sale price: $183.40 Muffler super turbo 97-99 4.0L TJ Regular price: $79.95 Sale price: $52.01 Muffler super turbo 93-00 4.0L XJ 93-98 6&8 cyl. ZJ Regular price: $89.50 Sale price: $63.49 Muffler super turbo 86-92 2.5L XJ 87-924.0 XJ 99-00 6/8 WJ Regular price: $89.50 Sale price: $63.49 If you have questions you can reach us toll free at 1-800-699-5337.