Thursday, April 20, 2017

MMWS Replacement Stihl 066 cylinder 54mm

Available NOW At HLSupply. (You can use the link at bottom of this post.)

A better, 54 millimeter bore cylinder for the Stihl 066 was 8 months in the making. We have Cross Performance Cylinders and Mastermind Worksaws to thank for this beast.

Cross Performance got Randy Evans, a.k.a. Mastermind, to analyze a new oem top end kit for a Stihl 066. Certain that he could improve it, ol' Peg Legs put it on the lathe and stuff.

With some port timing tweaks, better port shapes, and now boasting a bump in compression with better squish band design to increase squish velocity, the cylinder was sent back to Cross Performance.

The beefed up MMWS Stihl 066 cylinder prototype went to Cross Performance for manufacturing and a mold was made out of it.

Unfortunately, when a newly manufactured replacement Stihl 066 cylinder prototype was shipped back to Mastermind Worksaws, it was deemed that the exhaust port shape was not up to Randy's standards. Randy did some changes and sent it back to Cross for remanufacturing in due time.

The next rendition was really good.....and the rest is history.

...And here it is...

Replacement Stihl 066 cylinder

A premium quality, Nikasil plated, MMWS, 54mm cylinder kit.

Look for "Cross Performance MMWS Stihl 066, MS660 cylinder kit 54mm" now for sale at HLSupply's Web site as part number CP30066 at the link in the description of this video.

Your kit will likely ship to you within 24 hours, coming with high quality CABER brand piston rings from Italy.


This is a performance replacement cylinder for Stihl 066, MS650, MS660 chainsaws. It replaces Stihl OEM part number 1122 020 1211.
  • Premium quality Nikasil plated MMWS cylinder kit by Cross Performance. 54mm.
  • Includes high quality CABER (Italy) brand piston rings.
  • Fits: Stihl 066, MS650, MS660 chainsaws
  • 54mm bore
  • Replaces OEM part: 1122 020 1211


Your customers will LOVE it.

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