Next up in my C/L engine sell down is a nice K&B 61. Used engine but in very good/clean condition. Someone machined a small area on the top of the exhaust port for unknown reasons, there is still plenty of meat left and muffler seals fine. Included is a Jim Lee venturi/NVA and tongue muffler, there is not a stock muffler. $70 for this one shipped in the CONUS, I probably have that in the parts from Jim. * I just noticed for the first time, there is a matching cut on the bottom of the exhaust port. Top and bottom still measure .05 or a little more in thickness and the pass is about .160 wide???