Was planning on getting my car dynoed and tuned at Turbo Trix. My question is would a flash and tune really help that much with just an RMR intake and Espelir catback? What sort of difference would I see in like fuel economy and power numbers with a flash on only those two mods?

 

From what I can tell given the factory WOT (wide open throttle) A/F curve, some sort of tuning would be beneficial even if you had no other mods. Furthermore, who knows how that intake will affect the MAS signal? I'd suggest a dyno tune as a worthwhile mod.