Machined 81 Spur Gear and Mounting Plate for EB410 (ETK1798)

An EB410 upgrade kit combining a machined Delrin 81-tooth spur gear with a 7075-aluminum mounting plate. This two-piece design strengthens the drivetrain and helps prevent stripped gears, with hardware included for a straightforward install. Spur gear changes are quick and easy, and you don’t need to open the gear differential, remove the outdrive, or refill oils.

The alloy mounting plate also helps cool the diff fluid for more consistent action, contributing to reliable performance on track days. The setup works with an optional 72-tooth spur for additional gearing options.