I feel that the Arospeed Tunables are good mufflers. They come with silencer caps so you can tune them to your perfection. For a good price check the sig.cthunder said:I got a stillen, and it's just about ready to change to a new one. go with an arospeed tunable one if you wanna control the sound. ask your import friends what type of exhaust they have and see if you like the sound, pretty much everyone makes universal mufflers.