🔧 Enhance Performance with the Boost Monkey Spark Plug Gap Tool (12mm & 14mm) + Feeler Gauge Review

I will never use any other spark plug tool again. This has proven itself in test bench drives on 4 different vehicles. Consistency in the right gap is priceless.

This breakthrough spark gap adjustment tool. Compared to constantly hitting and guessing at the spark plug, this tool allows you to adjust exactly once without potentially damaging the electrode.

Adjusts gaps. Super easy and the large screw handle outperforms cheaper tools like this one I've used. I will end up buying a few more pieces for plugs of different sizes. Clearly marked and very useful tool.

Feelers are required to adjust clearance. (A wire-type gap gauge is impractical.) One possible improvement would be to change the shape to round so the gauge can be held in a vise. This would make it easier to hold the sensor with your hands and turn the knob.

Required to obtain proper clearance for reliable operation of uprated engines. Background, my car is out of stock and I need to close the gap 0.004 inch below stock. With this tool + pen I can set the gap with surgical precision. Eviction is now fun and fast.

Ugh, that's nothing for a 14mm spark plug. I don't know if I'm using this thing correctly, but the 14mm spark plug goes in and out. I figured I could screw this device onto a spark plug and then flip it over with a pencil to get the gap I needed. I did the job, but not properly.

Fast delivery. The tool is made of aluminum alloy and the surface is black anodized. Also great processing. I bought a gap for 14mm spark plugs to fit my 2012 Toyota Tacoma V6. Gap adjustment is very easy with this tool and you will need a filler gauge. In my case I used 1.1mm. I highly recommend this seller.

I love how well made and thought out this product is! The top screw has a nice large grip area and makes bending the spark plug loop easier. Also, the part of the bolt that attaches to the spark plug loop is large and flat so it makes firm contact and doesn't contribute to side impact on the spark plug loop, keeping everything perfectly aligned.

After years of confusing ground straps with other tools I decided to google pusher tools. much and has a fine thread pitch for the pusher part, which is important for fine adjustment. First use was straightforward and got the job done with pretty good results. a little wear on the threaded part of the pusher. This in turn resulted in a slight grinding of the flat part that touches the fork strap for adjustment. I can file it down a bit to smooth it out. Not sure if it will get worse later or…