So myself and friends recently installed a Southbend Stage 2+ On my 2016 Base WRX. After doing so we ran into a few problems, our most recent problem is in my engine rev, it has a strong idle in gear, or in neutral, but if I tap the gas and watch my rpms go up, I hit about 2-3k rpms and it starts backfiring really hard and my rpms fluctuate from 0, almost stalling to about 2, it flickers really hard back and forth, and consistently backfires until it regulates itself back to a normal idle. I have a video but it won’t let me attach it, I’ll be happy to send it to someone who’s interested in seeing. Thanks for any input, I’ll gladly answer questions.