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

These guys make the best hones I have used over 30 years. If you use this hone correctly you can bore a cylinder out 10,000ths top to bottom evenly for 10 over pistons and rings. I do this in a variable speed drill but it can be done in a drill press too. You must check all points in the cylinder often, cleaning as you go. Use a coarse hone to get most of it then change to a hone grit specified by your piston and ring manufacturers. Clean the cylinder and oil it testing with the piston for clearance. Use your micrometer til you reach spec so you dont get your piston stuck in the cylinder. Dont Rush!! Watch a cylinder honing machine on you-tube to understand the motion you must use to keep the honing even. Always use a quality honing oil.

Bought this to rehone the 3.8 Buick cylinders after trying to use them old stone three arm hone devices. I have no idea why I ever thought that contraption would ever work. This thing is a beast. Takes seconds to use properly and I didnt have a second thought about putting the crank back in and hooking up the Pistons. If you ever plan during your mid-life crisis that you must rebuild an engine, save yourself some time and get this and the next grit under and use these to perfectly hone your sbc or whatever man.

I used this hone on a 2.4l Volvo block to deglaze and put new cross hatching in the cylinders. This hone works amazing and was worth every penny. I was very nervous about doing this myself but after the first one I was comfortable with it. I used a Dewalt 20v drill on high and ran it up and down multile times for 2 passes using ATF as lubricant. The before and after speaks for itself. This thing works great.

Its worked great for dressing up the cylinders on the v6 i was working at school. It provided a great crosshatch pattern for the rings to sit to. FYI. Make sure to use a very light weight oil during the honing process.

Works excellent may seem to big or tight but its supposed be that this is for a 3in cylinder bore

Does an excellent job honing cylinder walls. Makes it easy to get a perfect cross thatched finish. For this price it is a very good tool.

Product performed better than expected... worked well for the job I needed it for ... would buy again and definitely recommend!!

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.

I contacted Brush Research to make sure I was getting the appropriate hone, because the option list is extensive and I wanted to be sure I ordered the correct brush. The staff was very helpful and answered my questions and advised me on the right brush to buy. However the price they told me for buying it direct from them was considerably more than buying from Amazon? So Amazon it was, still their product. I used it with a cordless drill using 5w-30 oil for about 20-40sec. I think it worked great and the cylinders for my Super Beetle look awesome and are ready to go back together. Cheap fix, saving the time and cost of taking parts to a shop for simple honing. Thanks Brush Research.

Item arrived as described. Will use as intended.