but u can always be safe...boost is something ull always want more of. u may just say i want a lil now but once u get it. u always want to turn it up. so its best to have another block on the side being built as u drive ur na non built ka-t. and with tuning i prefer dyno tune. Martin at Zfever charges $545 for your car tuned. there is a better option but thats wen ur trying to push a 10 sec 240 thats wen u go standalone engine management systems.