I have a 91tt with dual cone intake (dual maf) catback exhaust, dual syl boost controller, ash spec ECU, side mounted intercoolers, 615cc injectors and under drive pulley. It is set to run at 14psi and overall runs great (42k original miles). I am trying to get downpipes put on and I’m wondering if I need to get it tuned or if my ECU can level out the a/f ratio on its own. Thanks