L2 Competition Series Lightweight Muffler // Stainless Steel // // 2025-2026 Arctic Cat ZR/RIOT/M 858 C-TEC2 CATALYST Models
Our L2 Series Muffler is 14.1 lbs. lighter than the stock suitcase on the CATALYST 858 models!
Speedwerx L2 Competition Series Lightweight Muffler // Stainless Steel // 2025-2026 Arctic Cat CATALYST ZR / RIOT / M 858 C-TEC2 Models
Weight Savings- 14.1 lbs.
This muffler looks the same as the 600 version but they are not the same. Comes standard with our anti-bog deep snow technology, So when you are in deep snow and the exhaust caps off or plugs up there is an outlet or release point for the exhaust to exit so the sled does not bog or hesitate. This muffler uses all of the stock mounting points and hardware. It comes with the new Speedwerx performance guarantee to assure you it will not hurt the performance of your machine. Our extensive testing process and years of experience allow us to offer this performance guarantee. We started testing these mufflers in March of 2024 when the sleds were first released. We have tried and tested several different versions and variations to ensue we have the best muffler options on the market. L2 Competition Series Muffler is made out of stainless steel for the best appearance and longest lasting finish available. This is our light and loud version if you do not want a loud muffler do not get this version.
Updated pics coming soon, dB Info coming once production versions are on the snow.
L2 Competition Series Stainless Steel Muffler- AC858M-2
TECH NOTE: Power Valve cables- we have seen a large number of sleds that the power valves are not set properly from the factory or they have moved, this dramatically effects the overall performance of you machine. Using AC tool # 836-00005 you need to confirm these are set right and if you have issues check them again. In our opinion, this is needed on every single 858 out there even in bone stock form. There is also a Technical Advisory regarding the Servomotor Bracket Alignment issued 12/5/25- your dealer may have already contacted you about this done this as part of the pre-delivery inspection, but they can help you with these adjustments if you are not comfortable doing them yourself. You can purchase the Adjustment Tool Kit here- https://speedwerx.com/apv-adjustment-tool-kit-858-c-tec2-models.html
| Manufacturer | Speedwerx, Inc. |
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WARNING: Cancer and Reproductive Harm- www.P65Warnings.ca.gov See Proposition 65 Information for more on this Consumer Product Exposure Warning for residents of California.
These items are intended for closed-course competition only. Alteration of emissions-related components can constitute violation of federal and/or state laws. Substantial fines and penalties can result if used for other than closed-course competition use.
