BRM individual Small hole brushes. You can't have a clean engine with just a hot tank and an air hose with water. You need something to take out the old metal chips, the grinding compounds the sludge and the dirt from the parts you can't see - the oil passageways.

BRM uses the finest quality high-density 6-12 Nylon in there Nylon Brushes, some cases call for a lighter nylon fill, these cases are noted
Use the carbon steel wire brushes for the really rough spots

Cleaning brushes for lifter holes, piston pin holes, and oil feed holes

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BRM

BRM 13C 5/16" Carbon Steel Wire

Part #: 13C

5/16" Carbon Steel Wire For Cam Bearing Feed Lines and Valve Guides. 5/16" Carbon Steel brush that is 12" long

BRM 1A 1/4" Nylon Brush

Part #: 1A

1/4" soft Nylon brush with light fill and flexible stem for oil Feed Line Holes . 1/4" Nylon brush that is 10" long

BRM 2, 5/16" Crankshaft Hole Cleaning Brush

Part #: 2

5/16" Crankshaft Hole Cleaning Brush and Valve Guides Stiff Nylon Brush that is 12" long

3/8" Crankshaft Hole Cleaning Brush 12" long

Part #: 3

3/8" Crankshaft Hole Cleaning Brush and Valve Guides Stiff Nylon Brush that is 12" long

Oil Feed Lines and Main Oil Holes 3/8" Brush

Part #: 38

Oil Feed Lines and Main Oil Holes 3/8" Cleaning Brush. A Stiff Nylon Brush that is 34" long
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Oil Feed Lines and Main Oil Holes 1/2"

Part #: 42

Oil Feed Lines and Main Oil Holes 1/2" Cleaning Brush. A Stiff Nylon Brush that is 34" long

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BRM 46,1-1/4" Pinston Pin Hole Cleaner

Part #: 46

Nylon Brush Tapered Pin Fitter or piston pin hole cleaner up to 1-1/4" tapered brush that is 12" long

BRM 47C, 11/32" Carbon Steel Brush for Valve Guides

Part #: 47C

11/32" Carbon Steel Brush for Valve Guides. 11/32" Carbon Steel Brush for the Rough Spots, that is 12" long

BRM 47N, 11/32" Nylon Brush

Part #: 47N

11/32" Nylon Stiff Brush for Valve Guides. 11/32" Nylon brush that is 12" long

BRM 5, 5/8" Nylon Brush

Part #: 5

5/8" Long Nylon Stiff Brush for Oil Feed Lines and Main Bearings. 5/8" Nylon brush that is 34" long

BRM 6, 3/4" Nylon Brush 12" Long

Part #: 6

3/4" Nylon Brush For larger sizes of Lifter Holes up to 3/4". This brush is 12" long

BRM 7, 3/4" Nylon Brush

Part #: 7

3/4" Long Nylon Stiff Brush for Oil Feed Lines and Main Oil Galleries. 3/4" Nylon brush that is 34" long