Adding a Dual Port Muffler Kit to a MS660
Here is my first dual-port muffler installation on an Aftermarket MS660. Thanks to Lenny Bender for the original build and for the dual-port kit.

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Removing the Muffler Baffle on a Cheap Chainsaw

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Dual porting the exhaust on my ms660

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BEST Chainsaw MUFFLER MOD; No Guessing! DYNO PROVEN

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Stihl 066 Hyway Big Bore Kit

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Hutzl MS660 Upgrades & Improvements

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STIHL 066/660 MUFFLER MOD & RACE CHAIN SNEAK PEEK.

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Holzfforma G660 Porting TristarSupplyLLC Saw Fest 660 066 ms ms660 clone

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Unbelievable Smart Worker & Hilarious Fails | Construction Compilation #18 #construction #adamrose

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Basic work saw porting tips

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Porting & Piping A MS660 Muffler

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FarmerTec Blue MS660 Huge Air Leak G660

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MM660 (Mildly Modded 660 ) Part 2, Do things like simple muffler mods work?

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two mods you can do to increase power without porting! this really works!

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Is my chainsaw cylinder scored?? How to remove aluminum transfer from a cylinder!!

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Stihl MS250 Porting-POP-UP-Muffler Mod- Dyno and Cutting***Dyno Gremlin Captured!!!!***

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Egan Straight Shot Muffler on MS660 Clone

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Dangerous Grindstone Installation in 1971

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Exile Saw Performance products for Stihl 660

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Stihl MS 260 Chainsaw -- Been To Another Dealer 3 TIMES! -- And STILL WON'T RUN! Let's GO!!

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