mainstream had a deal, idk if they still do, but for a i think t3/t4 full kit,installation,and tune is like 2500 or somthing like that and for a gt25r is like 3500 not sure but when i went with a friend to dyno a car they told us about it..somthing jst to look into, oh yeah and while your at it, dont forget to change waterpump timing belt and rear main seal if they wernt changed in a while cause thats alot of miles..gl