Would like to check if base rex (225 model) changed to 3" for both down and mid pipe taking away the 2 cats but the rest intact, what will be the pros & cons. BTW, my ride was also fixed with a Blitz SBC ID-III Boost controller. What of powder do I expect to gain?
My next upgrade will be VF34+STi injector+ Walbro 255, any comments? What will be the gain in term of torque (stock is 30kg)?