Our RACING SPEC IV exhaust systems adheres to the same basic principles used in all of our RACING SPEC mufflers - straight through design and light-weight for efficient exhaust flow. Our RACING SPEC IV muffler has additional built in silencing cavities in the muffler, making it substantially quieter than our Spec III and and Spec III Pro systems without having to use a separate bolt-in silencer.
This straight pipe is very nice. I bought 1 myself for me 85 Corolla and it sounds really nice also. I don\'t use the silencer as much but besides that everythings nice. I\'m 15 right now and I\'m trying to get somewhere with my 85 Corolla that me dad loaned to me. They straight pipe I bought just killed it. Its really awesome!