is this for your vortech. you should probably call them then . how much hp and boost you making or plan to are big factors. but to throw a nmber out i think a 18 x 6 x 3 is good for around 250 hp but turbos are hotter you may be able to go smaller depending on your iat after compression.
look my sniggies, i had a strizz-oke in my brizz-ain okay,you know what im saying. so i cant move all good. but thanks for mentioning that .thank you very much.athf4evr. click here! you know you want to!!!