the T4 compressor comes with 3 common trims 50, 54 and 57 look at my sticky at the top of the forum, and see which one you like more, if you have no idea what all the means i can help...just post here...mys13240 wrote:Thanks for the warning guys. i want to get my ka turbo rolling. i need to get all the stuff partaining to the turbo kit. I want to go with the t3/t4 with the 50 trim. Do you know where i can get a new or remanufactured one pretty cheap? ive got my bottom end done and should have my head done soon.