Need a replacement muffler for your International 8600 TranStar? 4 State Trucks has a variety to choose from including muffler inserts for 7" or 8" stacks and exhaust dump which is 5" electronic solenoid controlled. We also carry chrome mufflers with 5" inlet/outlet, 8" x 18" exhaust resonators, 10" high flow replacement muffler, 8" x 22" aluminized muffler, performance or sport mufflers and 9" x 26.5" galvanized exhaust mufflers with a 5" inlet/outlet and a one year warranty from the date of purchase.