well i really couldnt tell cause i refreshened my engine after being down for about a month from bending and breaking a valve and was tapping my piston. so after not driving my car for a month and swapping in a t-5 for my slipping out then having a nasty exhaust leak for at least a week, i opted for the lt's. lets say my car felt better than it ever has and it still needs lotsa tuning but for the sound alone id do it. id hate to say its more peppy or anything like that cause so much was done at once. maybe someone who just did lt's only could say what kinda feel they got outta it