TR4A/5/6 Race Rear Hubs. These hubs solve the problem of the weak point of the original IRS: The potential of breaking a quill shaft / stub axle and loosing a rear wheel. Priced as a pair.
TR4A/5/6 Driveshafts for Race Hubs. These drivshafts feature larger universal joints to take more power, and a Teflon coated sliding joint. They are supplied complete with high tensile set screws for fitting to the rear hubs. Priced as a pair.