The permanent solution to smashed Baja Diffs/pins and also the shortage of genuine HPI bevel gears. The RCMAX HEX-LOCK kit for the HPI Baja (and Losi/Baja Hybrids) In our 1:1 Superlite brand single-seater cars (aswell as many other off road buggies and racers), we run 200HP+ through a solid axle with a quality driveline, so why not our high powered RC Cars? The current issue with locking your diff is the 4mm diff pins are still the weak point and snap with big power. Well we have totally done away with the internal diff pin and instead are driving on a 1/2" hex which simply won't break. This transfers the weak point out of the transmission and back to either the grip of the tyre or the 5mm wheel hub pins (which are super easy to replace).This will fit any Baja Tranny housing but you will need the IRC driveline kit to complete it.
RCMAX -Hex-Lock Ultimate Baja Locker for IRC dogbones-Diff removal kit for Baja