Absolutely the best "bang for the buck" performance DIY tweak - M112, M113, M272 and M273 specific but can work on any throttle body fuel injected engine.
Why is this not regularly done? Why don't a lot of shops recommend it? The results can be dramatic with regard to engine smoothness, acceleration, and fuel economy. Watch the video below, and Kent will explain the kit contents in detail.
1998 to 2013 V6 and V8 Air Induction and Fuel Injector Cleaning Kit
$33.85
SKU:
GEG-AIRINCLEANKIT 
Product Details
Two instructional videos are included. One on-demand video covers cleaning the throttle body on the M112, M113, M272, and M273 engines after you expose the throttle body. The second video covers the removal of the MAF sensor and intake air elbow and the cleaning of the MAF sensor. It is recommended you replace the seals on the elbow when removing it. See related products below. Instructions for elbow removal are included with the new seals. 272273