Performance Muffler Cover – Fits Stihl 500i

Aerospace-Grade Performance Exhaust System for STIHL MS 500i

Enhance power and improve engine cooling with this precision-engineered exhaust system designed for the STIHL MS 500i. Made from lightweight 6061 T6 billet aluminum, a high-strength aerospace alloy known for excellent heat dissipation, the one-piece muffler cover optimizes exhaust flow while helping to keep your engine cooler and extend component life.

Proudly manufactured in the USA and built for lasting durability under demanding conditions.

Outlet Direction (Facing Bar or Facing Recoil):
Facing Bar means the exhaust outlet points toward the guide bar side of the saw. Facing Recoil means it points toward the pull-start side. This is strictly operator preference and has no effect on performance.

Compatible Models:
STIHL MS 500i

Includes:

• One-piece muffler cover CNC machined from 6061 T6 billet aluminum
• Stainless steel exhaust intermediate plate
• Spark arrestor screen with aperture size compliant with USFS specifications
• High-temperature gasket – Made in the USA
• Complete hardware kit with all 4 mounting screws, vibration-resistant Belleville washers, and a 0.5 mL bottle of LOCTITE® 243 Threadlocker

Stainless Steel Intermediate Plate

The included stainless steel intermediate plate helps distribute the exhaust flow and refine the exhaust note while maintaining the performance benefits of the exhaust system. It also helps extend spark arrestor screen life under demanding operating conditions.

Dyno Proven Performance

Tested on a completely stock saw with no modifications other than the muffler cover. Results showed a 7.93% increase in horsepower and an 8.25% increase in torque. Performance gains will vary depending on the saw and the level of modification.

Warranty

Backed by the Undaunted Manufacturing warranty against defects in materials and workmanship under normal use. Excludes misuse, neglect, improper installation, or unauthorized modifications.