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Stihl MS661 CM stock vs MS461 ported
STIHL MS 500 i vs. STIHL MS 661 C.
Bosch -vs- NGK - Ported Stihl MS661
Stihl 661 bark box vs stock [4k HD]
stihl 661 vs ported 372 husky - surprising results
Stihl MS661 (7.3HP) vs MS500i (6.8HP) vs MS462 (6HP) - same bar & chain
Stihl Ms661c VS 500i! 36”&25” Bars!
PORTED STIHL MS460 VS STOCK MS661C
Wildside Stihl 661C, ported, polished and dual port muffler mod.
Ported MS661 Comparison - 9pin sprocket 20" stihl chain
Ported 395XP vs Ported MS661 - 36" bar .404
Stihl MS 661 stock vs ported
![Stihl 661 bark box vs stock [4k HD]](https://img.youtube.com/vi/7SWKtU5LT0s/hqdefault.jpg)
