42mm x 37mm 050s
72cc intakes
50cc chambers
94mm pistons
Deeper spring pockets
86b
![](http://i1199.photobucket.com/albums/aa476/lukemj/FB_IMG_1489915521445_zpsujvwkylg.jpg)
![](http://i1199.photobucket.com/albums/aa476/lukemj/IMG_20170313_185352_zpsxhtrjvrg.jpg)
![](http://i1199.photobucket.com/albums/aa476/lukemj/IMG_20170313_185337_zpstzxshel8.jpg)
![](http://i1199.photobucket.com/albums/aa476/lukemj/IMG_20170313_185426_zpsbdtsmnhr.jpg)
I made a silicon plug too, gives a nice indication on the port shape and makes measuring CSA much easier... manifold wants opening up a little about 3" up from the flange I reckon... seems to close up a bit then open out again at the head before tapering back down.