Review on 🚀 Boost Engine Performance with JET 62134 Powr-Flo TBI Spacer by Kevin Folsom

I have a 2008 h³ 3.7L Hummer with manual transmission. After installing the spacer, I was concerned about an erratic idle that would stall when the clutch engaged. RPMs would sometimes climb to 3k and flatten out at one point. I've noticed that it settles down a bit as it nears 100 miles travel time. In terms of power or throttle response, I notice better performance, but not by much. Update: I removed the damn thing.