worked like a charm

Made in USA quality, really helped clean out the bore in the cylinder heads.

I've read some reviews here that said these didn't work well, even after chucked up in a drill. All I have to say is, those folks must have had some pretty nasty buildup.

In my case, with 260,000+ miles on my 7.3L Powerstroke, the junk was minimal and these brushes did a great job of cleaning up the injector cups. At first I couldn't figure out what the second bush (not shaped like the cup) was for, but soon figured it out as I inspected each cup after brushing and discovered the bottom edge was still a bit gunky. -That- is what the second brush is for. It helps scrub the bottom interior of the cup, getting the inner edges nicely. I'm glad I got these before installing the new injectors. I had nice clean cups.

Good brushes, work well. Little expensive but then again I couldn't find something the correct shape anywhere else.

I didn’t want to do my cups twice. Brushes are pricy but give peace of mind that they are doing the exact task they were designed for, and will clean thoroughly without damaging the injector bore

Great brushes, since preparation is King! for proper sealing, they were a must, since that old compound was not easy to remove even with them,

Worked for the job and should work for many more. Quality brush kit, although could've been a little lesser of a hit on the wallet

These two brushes work well to clean out the bores in preparation for installing new injector cups. Used in conjunction with aerosolized brake cleaner, these brushes make bore cleaning easy.

Thank You