Brush Research GBD40024 FLEX-HONE, 4 (101mm) Diameter, 240 Grit, Silicon Carbide Abrasive (Pack of 1)

If you know what this then you know what it’s supposed to do. This one do exactly that

Does a beautiful job as advertised. No complaints on performance or price.

Exactly what I needed for 5.3 LS

I was worried about the size as the 3.78 inch bore of the 5.3 is on the edge of the range listed for this product. It did a great job and I was very happy with the results. I used motor oil as lubricant and did about 10 in out passes. Make sure to go slow on rpm and fast on the in out to try to get the 45 degree cross hatch.

Awesomeness

Works great! Not as deep cutting as honing tool with stones. Used this as a starter and finisher. Leaves a great finish! I used this on my 2.5L Subaru

Used the 89mm size hone for my 84mm cylinders in my 52 motor and seemed to work good. Just lubed it up with some motor oil and followed instruction and the cross hatching seemed to come out really good, gotta speed it up on the last few strokes or else your cross hatches will not be close to 45 degrees which I found out quick enough.

Bought this to rebuild a LS 5.3L. 5 seconds in each hole on low speed. Perfection!

awesome---cleaned up a 7 inch bore cylinder 10 feet long and shows little wear---highly recommend

Works perfectly