ok heres my problem i got a ls with a gsr in it that is bone stock besides the headwork i have done port polish, valve job all valve springs retainers and valves are titiam . i know that i am going to need to tune my motor but right now i have nothing to tune with cam gears, fpr, ect. i am running rich as hell and my boy that has a shop told me that i should get a cat back beacuse the stock ls exhaust system is holding every thing back. but on the flip side i also want to get a vfac2 so that i can atleast tune it a little bit. what should i get fist apex ws2 or vfac2

any help is appreciated

 

get the exhaust first. If you want to solve your running rich problem, by a FPR. Don't waste money on piggy-back tuning systems, buy a full standalone.

http://www.team-integra.net/se...=1134

 

so getting the cat back and fpr should solve most of my problems untill i can built the rest of my motor and get my bolts ons to be tuned