I troubleshoot my small air compressor and fix the CFM issues so I can use an impact wrench at full power.

3/8 air regulator I used was same brand as this one (not available at this time    https://www.amazon.com/PneumaticPlus...           ) 

So I would order this one 

https://www.amazon.com/dp/B01F2VGPEG/...

The air filter is a 1/2 NPT and this is what I used

https://www.amazon.com/gp/product/B01...

Remember to purchase the required pipe fittings to be able to plumb this together. Once you open up the air flow thru your air lines you will be able to drive impact guns to full power. It won't work for DA sanders and such because they are continuous use tools but an impact gun doesn't run full time. The small air compressor will be able recharge before you hit the next tire on your car.