Hey, it's me again. I did read several articles about Removing the torsion vibration balancing...yada yada. Bottom line is you will get more horsepower from weight reduction but you will hinder long term reliability. I will put my AEM on this weekend and will let you guys know about the stereo situation. Thanks for all the info.
There is a lot of rumors floating around about this so I thought I would attempt to clear them up.
First of all ONLY one celica had problems with the UR kit on his celica, and his engine died due to OIL starvation, because his motor burned a lot of oil and he didn't check it and boom it died. The engine failure was not related to the UR pulleys.
Second, any modification will decrease the life of your engine, you cant add more hp and expect the same motor to last just as long, more HP=more wear and tear.
Thirdly, You MUST install a crank pulley properly, with the correct torque settings, and run the correct belt, and improper installation will cause failure of the pulley and or engine. This install is only for the mechanically inclined.
fourthly, the crank pulley from UR for the GT and GTS celicas are identical, the waterpump pulley is only available for the GTS, the alternator pulley is identical also for both motors.
Fifthly C-one makes a crank pulley and sells it for about 180 USD, and it comes with the belt.
There have been no reported problems with either pulley.
I've had mine on for close to 3K miles and I haven't experienced any problems.