RELIABILITY: Precision-ground to 22.5mm x 28mm x 9.5mm for exact fitment within the brush holder, minimizing arcing and extending commutator life.

Key Features

• ✔ High Copper Content: Optimized for high current flow.
• ✔ 42mm Lead Length: Includes flexible copper shunt for easy installation.
• ✔ Direct Fit: Compatible with both 12V and 24V HD systems.

Technical Specs

Length (L):	22.5 mm
Width (W):	28.0 mm
Thickness (H):	9.5 mm
Lead Length (LL):	42.0 mm
Material:	Copper-Carbon

Starter Series	Typical Application	Voltage
Delco Remy 42MT	Heavy Duty Trucks (Freightliner, Kenworth, Mack)	12V / 24V
Delco Remy 37MT	Industrial & Agricultural Engines (CAT, Cummins)	12V / 24V
Delco Remy 40MT	Commercial Fleet Vehicles	12V / 24V

Is this part suitable for 24V starters?

Yes. While these brushes are frequently used in 12V 42MT starters, they are fully compatible with 24V versions of the 37MT, 40MT, and 42MT series as the physical dimensions and copper-carbon grade meet the requirements for both systems.

How do I know if it is compatible?

We recommend checking the dimensions (22.5 x 28 x 9.5mm) against your original brush or verifying your starter motor's model number (e.g., Delco 42MT). If your OEM part number matches the cross-reference list above, this is a guaranteed fit.

Do I need to replace all brushes at once?

For heavy-duty starters, it is highly recommended to replace the full set of 4 brushes. Uneven wear between old and new brushes can lead to poor contact, overheating, and premature failure of the starter motor armature.