I installed this on my gmc sonoma 4.3l auto. It improves breathing, adds a mild amount of power across rpm range and makes a significant noticeable improvement at full throttle. Adds a minor "growl" that is quite enjoyable without being obnoxious. Picked up a little mileage too, about 2mpg on average - but only when I can resist the urge to stomp on the gas. Installation was simple and straightforward,it fit - but didn't seem made to fit. Minor adjustments required.
easy install, until reinstalling,,,
teardown to remount TB back on aprox. 15 min.. remount air box takes a saw not a file. then a shoe horn. very tight, then a good stretch to hook next stage to box, add about 40 min. I think at this time a coldair intake would save a lot of time, and look a lot better, plus another shot at more power. Either ways you should change to a K&N air filter. A good increase in bottom end power, I'm not down shifting to maintain same speed on cruisecont. as before. Added about 2 mpg. This little 2.2 Liter needed this bad when full of cargo or pulling small trailer. Deke