ok i tried searchin and didnt find too much info, so work with me here.


ive always run the 7's leading and the 9"s trailing like your supposed to on stock FD's, but recently ive bin hearing rumours of going to 9's all around. is this viable on a car with the stock ecu? will i gain anything from running the 9's all around vs the oem way? also will i wreck anything by running 9's for both leading and trailing.

also my car has intake, DP, Midpipe(with restrictor plates!!) and RB catback for flow mods. running the twins at stock boost.

any help is appreciated.

 

Run 9s all around till about 350RWHP. You should then run 10s when you go in the 400-500rwhp range.