I've run RA seals for 6 years with hard driving and excessively high RPMs (I beat the hell out of this motor). My car was nowhere near perfect at the time, I built it while in highshool with the help of a friend. It's a carbed 13b 6port and has run in both rich and lean conditions. The engine had a failure in 2010 that I didn't realize till returning home from a B3R trip, I had a blown coolant seal and destroyed bearings. With all this extra play in the motor the seals held up and made the 300 mile trip, thankfully getting me home. I took the motor apart and even with the excess play from the bearings crapping out on me the seals still looked great and the rotor housings looked ok considering what had happened.
I had already purchased new seals and a local friend of mine wanted to use my old RA seals in one of his projects, still to this day I believe that motor is still running.
I'm a fan of these seals and recommend them
