Speedwerx - Fat Daddy Single Pipe and Y-Pipe // 2025 Arctic Cat ZR / RIOT / M 858 C-TEC2 // 5000' + Elevation Only!
Update 2/5: Very Limited Quantity Available. BACK ORDERS will be shipped late Feb
Our High Elevation Fat Daddy Pipe Kit for the Arctic Cat 858 adds 8 HP everywhere from 6000 RPM to 8300 RPM, and is 2.4 LBS lighter than stock too! The pipe and y-pipe both have a bright silver ceramic coating that not only looks good, but also helps with heat retention for more consistent runability. This pipe is designed and tested for use only at 5000’+ elevation with 91+ octane non-oxygenated pump fuel. It does not require an ECU Flash, however we will be releasing a flash for those that want the cleanest and most responsive power and performance. It bolts right up using the stock hardware, and comes with a different graphoil donut for the exhaust outlet and a pipe banding kit for vibration dampening. It is compatible with the stock muffler or any of our Speedwerx mufflers, other mufflers have not been tested and are not recommended as different flow rates and back pressure may affect the runability and performance.
- 8+ HP Gain
- 2.4 lbs Lighter Than Stock
- Fits Into Stock Muffler
- Ceramic Coated
- 100% Made In The USA!
Preliminary testing has shown a 8+ hp gain for the Pipe and Y-Pipe alone, and a 18hp gain with the Pipe, Y-Pipe, Stealth Head, and Air Intake with no ECU tune required at high elevation! We will be offering our Exterminator Kits for a complete package that include these parts plus an ECU Tune and Hypershift Clutch Kit for maximum power and performance in a bolt-on kit- availability TBA