fuck a muffler. buy a full exhaust. and we cant tell you what you will like. i personally dont like the apexi world sport as much as i like the canister exhaust systems. i had the Greddy Evo2 on my gsr when i was NA, but i also like the HKS Drager and the Skunk2 was pretty nice as well. a buddy of mine is selling his skunk2 axle back. pm me and ill give you his number