The BG tool sprays it through the throttle body like a mist so it runs through the intake a reaches the valves and cleans as it goes through. BG products are really good products and we fix a lot of cars using their products. It may not be worth buying the tool just for your personal use. The OTC tool Is like 130 bucks. Or you could buy the tool, go to the dealer parts dept and buy a few kits and do some on the side to pay for the tool 
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2010 Camaro 2SS/RS, L99, OBX Longtube Headers, Magnaflow 3in Comp Cat Back w/ added Dynomax Bullet Race Mufflers, SCT Tuner w/ JRE Tune, CAI Black Intake w/ JRE Race Scoop, Eibach Pro Springs, Custom Sequential Tailights
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