Aerospace-Grade Performance Exhaust System for STIHL MS 261 Series
Engineered for superior power and cooler engine temperatures, this exhaust system is precision-crafted from aerospace-grade materials built to handle the toughest conditions. Proudly made in the USA and backed by a lifetime warranty, it delivers unmatched reliability and durability.
Compatible Models:
STIHL MS 261, MS 261 C, MS 261 C-M (Version 3.0+ only)
Note: Not compatible with M-Tronic Version 2.0 or older. Early M-Tronic systems may not support this modification due to limited fuel adjustment capabilities. Carbureted models are fully compatible.
How to Check Your M-Tronic Version:
Version 3.0+ saws typically have a manufacture date of 2019 or later. You can also check the control module part number or consult a STIHL dealer for confirmation.
Premium Features:
CNC machined from 6061 T6 billet aluminum, a high-strength aerospace alloy that dissipates heat much faster than steel, improving engine cooling and extending part life
Includes muffler base, muffler cover, high-temp gasket (between cover and base), and stainless steel hardware
Bi-directional exhaust outlet for flexible mounting — position facing the guide bar or recoil side to fit your setup
Comes with a replaceable, USFS-approved stainless steel spark arrestor
Dyno Proven Performance
Tested on a completely stock saw with no modifications other than the muffler. Results showed a 12.27% increase in horsepower and a 13.88% increase in torque.
Performance gains will vary depending on the saw and the level of modification.
Installation Notes:
Post-installation tuning or recalibration is required for optimal performance
Use Loctite 243 thread locker on all mounting screws for secure, vibration-resistant assembly
Warranty:
Lifetime warranty covers defects in materials and workmanship under normal use; exclusions apply for misuse, neglect, or unauthorized modifications.
All pricing is listed in US dollars.
Aerospace-Grade Performance Exhaust System for STIHL MS 261 Series
Engineered for superior power and cooler engine temperatures, this exhaust system is precision-crafted from aerospace-grade materials built to handle the toughest conditions. Proudly made in the USA and backed by a lifetime warranty, it delivers unmatched reliability and durability.
Compatible Models:
STIHL MS 261, MS 261 C, MS 261 C-M (Version 3.0+ only)
Note: Not compatible with M-Tronic Version 2.0 or older. Early M-Tronic systems may not support this modification due to limited fuel adjustment capabilities. Carbureted models are fully compatible.
How to Check Your M-Tronic Version:
Version 3.0+ saws typically have a manufacture date of 2019 or later. You can also check the control module part number or consult a STIHL dealer for confirmation.
Premium Features:
CNC machined from 6061 T6 billet aluminum, a high-strength aerospace alloy that dissipates heat much faster than steel, improving engine cooling and extending part life
Includes muffler base, muffler cover, high-temp gasket (between cover and base), and stainless steel hardware
Bi-directional exhaust outlet for flexible mounting — position facing the guide bar or recoil side to fit your setup
Comes with a replaceable, USFS-approved stainless steel spark arrestor
Dyno Proven Performance
Tested on a completely stock saw with no modifications other than the muffler. Results showed a 12.27% increase in horsepower and a 13.88% increase in torque.
Performance gains will vary depending on the saw and the level of modification.
Installation Notes:
Post-installation tuning or recalibration is required for optimal performance
Use Loctite 243 thread locker on all mounting screws for secure, vibration-resistant assembly
Warranty:
Lifetime warranty covers defects in materials and workmanship under normal use; exclusions apply for misuse, neglect, or unauthorized modifications.
All pricing is listed in US dollars.
