Hello, im new to the forum. i ordered a stage 1 kit from Freektune and we are currently working on a e30 tune for my 13' ST1. I have the Cobb RMM, COBB high flow filter, Turbosmart BOV, and muffler delete. I received the first tune from Freektune and love it so far, i just noticed that sometimes under acceleration with full throttle, i get a lot of backfire during acceleration. it sounds great and i like it but i dont think it should be happening, in previous vehicles, i would sometimes get backfires but after i let off the throttle. Any ideas on what could be going on? thanks!