I just finished doing 1.6 rockers and valve springs on my car, and oh my god... I can't believe I didn't put these on earlier (they have been sitting on my counter for 3 months now). I def. feel the difference, I can feel the car pulling a lot more in the upper rpms. My only problme is sometimes I get a tick. It only happens when i first start the car. I know what your thinking... just noice lifters. but it's only 2-3 ticks that aren't rhythmic with the engine. i.e. click..click...........click. any ideas? is this normal? the rockers are not noisy at all... not valvetrain clatter, so I dont think it's the valvelash