Search Results for ‘iridium’

I finally got to the dyno Dec. 2nd. The sportsman 570 rated at 44 crank horsepower puts down 33 wheel horse power. My only mods are snorkel kit and QSC clutch kit. I tried a K&N air filter first, it made less than 1 horsepower difference. I also tried a iridium spark plug(found the part...