I have the RR12L3 mounted in my Rs4-3ss and it has torque galore!!! I use this car for parking lot racing only and this engine really moves this car quick. I run it without the restrictor and 30% blue thunder. Took a long time to break in (~10tanks). Idles forever, never flames out and runs over 10 mins on tank. Engine runs like stink...excellent engine. Now if only NovaRossi would make a .18 small block to blow away the OS TZ...