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

Used to hone cylinder bores on engine rebuild. Nice cross-hatch finish.

Worked wonders!!

Fast, easy to use. I lubricated with transmission fluid. Took glaze off fast and left nice crosshatch. You must move quickly up and down. Lubricate hone between each cylinder.

I was very pleased with how well that this brush worked. I had one of these hones for over 20 years until someone borrowed it and never brought it back. What I am trying to say is that this is a very high quality hone, and will last a long time

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.

Easy to use and did the job perfectly. Will be getting more when I need them.

This is the only hone to use on engine cylinders. I am a master mechanic and the reasons are many. The cross hatch pattern this hone makes is the best for breaking the glaze on new rings and seating them in. Brake type hones are good for rubber seals, plungers, etc to steel bores but not for high friction steel to steel applications. Dont be a cheap skate when it comes to your engine - Go with the best parts and practices. Also, dont use Synthetic oil in engines with new rings. Get at least 500 miles on them and then switch to a synthetic (Same Brand) if you want to use it.

Excellent product. Brush hones are a very good thing to have around and BRM makes about the best ones. The price on amazon is inline with just about everywhere else so cant complain there. I used this particular hone on a standard bore small block ford engine block to hone the cylinders before I installed the pistons and rings. The 180 grit has worked great for me with standard Iron piston rings. If youre using moly rings or something else, refer to the manufacturers recommendation when choosing grit size. I also like the brush hones because you can purchase one for less than a machine shop will charge you to hone your cylinders, and you can usually do more than one block with one. The last BRM hone I had did 5 small blocks and still has some life in it. Take that for what you will. Very good product at a very good price. Definitely recommend for your rebuild or re-ring project!

This honing tool worked perfectly and now we’re ready to start the re-assembly of our engine.

I bought this for my 1997 SeaDoo Speedster engine repair. I originally honed it with this but then found out I needed to get the cylinder bored over for other reasons. I took it into the machine shop and the machinist was in awe how amazing the cylinder looked he was wondering why I was even there. The cross hatch this tool leaves is second to none. This is a must have for anyone who regularly works on engines, but keep in mind these are fitted for specific size bores. If you just need one for a different size bore every time on new engines you work on, it might not be cost effective for you. For me, I would rather accumulate a whole set...so its all good for me.