QUAD WORKS ATV POWER KIT STAGE 1. This is the industry standard ATV Power kit. Each kit includes a Quad Works stock replacement air filter, a Dynojet jet kit, and a Quad Works pre-filter. This kit delivers better throttle response and an average of 10-15% more horsepower. A Quad Works ATV Power Kit gives your ATV the complete package for more horsepower and better throttle response. Designed and adjustable for use with aftermarket or stock exhausts. Also adjustable for all altitudes. All Quad Works ATV Power Kits come complete with all instructions for easy installation. No matter what type of ATV you ride, Quad Works has the ATV Power Kit it give you the power and performance you need!