Hey, quick question. I am building up my turbo block for a swap into my gxl. I was going to have the injectors sent out to be cleaned but I think maybe I should just get some 720's. I think I will need the 720's after doing the exhaust and TID and a few other power mods. I already own a Super AFR, should I just get the 720's now? also should I put them in all four spots?

 

you will have a hard time controling all 4 with just an safc and lower boost.
get two for the secondaries and youl be ok

 

550's will be fine until you start doing turbo upgrades, 720 secondaries wouldn't hurt though since you can control them with the safc.