When I was looking at cam options for my 1500 X1/9 engine turbo project I considered the UT cam. The thought was it is a turbo spec cam for a very similar engine so it might be an improvement over the X's 1500 (US spec) cam with a boosted application. And obviously no one makes a turbo spec cam for the 1500 X engine. I was very surprised at the very low specs for the stock UT cam. Frankly it is rather lazy and not any real improvement over the US spec NA 1500 cam. In fact I read where some UT guys have installed the X's stock cam for an improvement. So I looked at what's available from the aftermarket cam makers for performance cams for the UT. Again, I was rather surprised at the specs. Several of them had a lot of overlap, which as I've said is considered the worst thing you can do on a boosted engine. And some were extremely radical in terms of the RPM range, obviously intended only for race application. The only advantage I saw with any of them was the increased lift - and some had a LOT of lift. Possibly too much depending on what valve springs you run, what valve to piston clearance you have, etc. But again, on most of them the biggest problem was the overlap; as lift got higher so did duration and overlap. And the prices were significant, particularly when shipping to the US and the exchange rate were considered. The bottom line is the best option I found was the stock Euro spec 1500 X1/9 cam. Almost no overlap, good lift, plenty of torque in the lower to mid range, great idle, and smooth acceleration to redline. I think that might be one of the best choices for a UT engine that is intended for road use (race track use only is a different story). Particularly a relatively stock one with the original ECU.