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MS661 First Round Of Modifications
Modified! Stihl Ms661!!
Tuning up my Stihl MS661 | How to Tune a Chainsaw!
STIHL MS661 FRANKENSTEIN BUILD... CD2100 piston.... ported and machined... first run...
Stihl MS 661 C-M Muffler Mod, Before/During/After
The chainsaw guy shop talk MS 661 Test Saw Modified
STIHL ms 661 Muffler Mod First Run! And Weekend Project!!!
Stihl MS 661 Muffler Mod
Stihl MS661-C Part 1 Dual Port Muffler Mod
MS661C Additional Mods
STIHL EXTREME Modified MS661 Chainsaw Shootout - Ported with Stroker Crank vs. Ported with Nitrous
Stihl 661C muffler mods and exhaust port work, like and subscribe for more 😎👍
