Brush Research FLEX-HONE Cylinder Hone, GB Series, Silicon Carbide Abrasive, 4-1/8 (105 mm) Diameter, 240 Grit Size

Rebuilt a Jeep Grand Cherokee 4.0L (straight six) without removing the engine from the vehicle, and the Flex-Hone worked great for me. Did a lot of homework before using, to understand exactly what the procedure was and that I had the necessary drill, clearance, fluids, posture, RPM, and honing technique. I had to mod the hone to weld a hex bit to the shaft (making it as short as possible from drill back to hone-front for the mounted engine), but managed to get the job done. I would not have been able to use any other traditional honing tool in the space, and it was very forgiving for the angles I was working with.

worked perfect to deglazed cylinder wall on 2003 Ford Focus 2.0L SPI , also known as the dropped valve seat engine SOHC. Adds a nice crosshatch to cylinder. Directions for use were on end of brush box.

Being a hobbyist rebuilder I am very happy with the results of this hone. Makes up for a mulittude of errors on my behalf in skill. I have a Lisle rigid hone and that works really well for the rough work but this made the final a finish factory finish. Seated perfectly

Worked great for b20v block mid bluid( high compression pistons and new rings of course)

Got the hone oil a must to keep it wet. My option.

I am no expert on cylinder homing, but had no issue using this hone. It worked as expected and my cylinders are now honed. Just a few seconds per cylinder and the job was done. I only needed it for 2 cylinders so I dont know how durable it is, but it seems like it is good quality to me.

Used this to hone out my 717 SeaDoo 2 stroke. Cleaned up the cylinder walls nicely. I ran it easy the first hour to break in the old rings again. Runs good now.

I’ve used stone type hones for years, these are super simple, create a great cross hatch pattern and clean up easy. Only down side is the need for several sizes to cover what you can do with a stone type hone. For ease of use, I’d highly recommended.

Have used these for years building subaru motors and yet to have an issue. Great product

only did one chevy - about 15 pumps with 240 grit (best all round). Coat the bore AND all balls with atf and a brush before use - clean SUPER well till a white clean paper towel shows no grime - Cross hatch pattern was unbelievable - and this was my first time. I wouldnt look anywhere else, drop the dough and do the job right!