Originally I blew a headgasket and set out to replace it with the best parts I could find. I ended up rebuilding the head, decking it 120 thou, porting, polishing, and portmatching. I installed a dual core steel rad to make up for the heat and the best fel-pro gaskets i could find. I only did the top end of the motor, but add on ram air and a low restriction exhaust and these 2.0L motors scream!