This full stainless steel header is a direct bolt-on upgrade for 2017-current Arctic Cat Thundercat 9000 and Yamaha Sidewinder / SRX 998 Turbo snowmobiles, delivering a proven 15 horsepower gain along with increased torque and faster turbo spool. Precision TIG-welded and designed to retain all factory heat shields, it keeps the OEM look while improving exhaust flow and heat management.

It works great on stock sleds but really wakes up when paired with aftermarket ECU tunes, intakes, exhaust systems, and clutch kits—no cutting or fabrication required, though a proper clutch calibration is highly recommended to make the most of the extra power.