Engine Kits

BRM GBD41424  4" to 4-1/4" 240 Grit

BRM GBD41424 4" to 4-1/4" 240 Grit

Part #: GBD41424
List Price: $145.98
Our Price: $72.99
You Save: $72.99

Availability: In Stock

Fits Bore Sizes 4" to 4-1/4",

This 240 Grit is perfect for prepping the cylinder walls for Moly Rings!

Heavy Duty Flex-Hone has 50% more Globules than the standard flex hone. (13 1/2"OAL)

This EXTREMELY POPULAR SIZE ball hone fits Common Chevy, Ford and Chrysler V-8 applications....

Brush Research Mfg. Co. has a Flex-Hone For Any Type And Size of Cylinder
The Flex-Hone® Process (Super finishing) produces a controlled surface condition unobtainable by any other method. It involves finish, geometry and metallurgical structure. A high percentage plateau free of cut, torn and folded metal (with radiused ports).

NOW is the time to order this item.

What is Deglazing?
In a gasoline or diesel engine, the pistons ride up and down within the engine
maintaining a tight seal via the piston rings. Over time, the constant rubbing
of the rings against the cylinder wall can polish it to a very smooth finish.
This creates problems in two ways. First, the lubricating oil in the engine will
not adhere properly to the mirror smooth surface, and friction is increased.
Secondly, while breaking in newly installed piston rings, a minute amount of
wear must occur between rings and cylinder wall in order to seat the rings
properly, and ensure a gas-tight seal. If the cylinder walls are too smooth, this
wear will not occur, with the rings “skating” over the polished surface.
In order to correct the situation, a mechanic can take the engine apart, and
deglaze the cylinders, with a Flex-Hone Tool. This creates a roughly 45 degree
angle crosshatching of tiny grooves in the cylinder wall, and restores the
engines performance.

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