What brand of Stihl 066 Big Bore has widest exhaust piston skirt OR?

[machine31]

What brand of Stihl 066 Big Bore has widest exhaust piston skirt for widening the exhaust port the most OR can a 395xp piston be used if it has wider skirt? I thought i read it has a larger piston pin. The piston I have is 35mm diameter across piston skirt...are there any at 37mm or so?

 

[machine31]

Will the 056 AV Mag 2 piston work in the big bore kit? Looks like the skirt is wider to port exhaust wider

http://www.ebay.com/itm/PISTON-KIT-...PLACES-STIHL-PART-1115-030-2003-/181636462030

 

[Deets066]

Will the 056 AV Mag 2 piston work in the big bore kit? Looks like the skirt is wider to port exhaust wider

http://www.ebay.com/itm/PISTON-KIT-...PLACES-STIHL-PART-1115-030-2003-/181636462030

Last I remember a 56 piston had a dome and was shorter crown and shorter skirt.

I do know that 395 Pistons have been used in a big bore