Review on 🚀 Boost Engine Performance with JET 62134 Powr-Flo TBI Spacer by Aaron Bannister

I took a chance considering everyone says they are bad and a waste of money but for me. That's great! I mean my 04" GMC Envoy has a 4.2L k&n intake manifold and when you lower it you usually feel the intake kick at about 5 krpm like you feel extra power. The amazing thing is that with the shim, you no longer press at 5,000 rpm, but at 1,000 rpm! Do you mean that seriously? It's amazing that this works. I'll get back to you in a week or so and let you know how it goes. How mpg and if the stream is still there. But overall nothing. It really works. just like he claims. Also NO CHECK ENGINE LIGHT! COURT! Update: a month later So my thoughts are still the same. That's great. And what's really cool, which I didn't notice before because my truck is straight tubes, is that you can hear the almost turbo whine sound at low revs, which hurts. I still feel that extra boost from this thing, which is amazing. Yes, to be honest I would buy if you're wondering, there are actually improvements :)