Hello guys, I found the two mufflers, but they didn't have the spacer flange with them, so now I am looking for the flanges for my OS 160 FX 2stroke engine... The exhaust port measures 1 1/8W x 1/2H and the bolt pattern measures 1 3/4 from the center of the holes, and the outer holes measure 2 1/8 to the center of them... If it is slightly used without dents or scratches that is ok too... I am supplying a picture of the set up that I need.... If you have any questions, Please feel free in sending me a PM... Thanks Alot For Looking!