661 STIHL S/S PERFORMANCE COVER

Stainless Steel Dual Port Muffler Cover + Gasket

High temp - Graphite / Carbon gasket with stainless steel tang insert.

POLISHED FINISH 

Stihl MS 661

Bolt-on power - Dyno Proven results!

- 11 Gauge Stainless steel Faceplate

- Built-in spark arrestor screen (Regulation)

- 100% Stainless steel

- TIG Welded

- Polished finish

- Lifetime guarantee 

INSTRUCTIONS:

*** non-Mtronic / non-Autotune Chainsaws must be tuned properly when adding a modified muffler or ported faceplate  ***

Mtronic & Autotune saw models will adjust automatically but a factory reset is recommended when changing to modified muffler 

- LOCTITE Thread locker is recommended