BOUGHT IT LAST CHRISTMAS IT WORKS AWESOME...STILL HAVE BOX ..ITS IN MY CAR NOW...IM IN LONG ISLAND NEW YORK...WILL NOT DO ANY MAIL EXCHANGESwhen i first got it i didnt really notice the difference but when i had to drop it off at the dealer for service an put it back to stock..i noticed it then works great !!! best part is the increase shift point motor screams to 6250 an still pulls!!!SOMEONE FROM THE ISLANDS FIRST 300$$$$ GETS IT MY EMAIL IS tommyzad@yahoo.com....