Includes trap door, all gears, mainshaft, countershaft, shifter drum, detent components, bearings, snap rings, gaskets and hardware.
Significantly smoother shifting than stock thanks to a roller detent shift drum with reduced inertia and gear dogteeth with lead-in ramping ⚙️.
The bearing door is manufactured from 6061-T6 aluminum and features wider bearings with bearing retainer plates instead of the stock-style snap rings.
Gearsets are made from 8620 steel, cut before heat treating and precision ground with diamond-coated tooling for quieter operation.
Delivers lower RPM for smoother highway operation and improved fuel efficiency.
Exhaust bracket may require modification for some installations, and recalibration of electronic speedometers is required after installation (see part 2210-0391).
Made in the USA 🇺🇸.