RE: Difference between OS E-3020 and E-3070 Silencer
Likely, there are differences in the casting. The E3020 was also used on the .25-size engine, so the E3070 may be a bit larger, or the shape may be a bit different. Maybe the molds wore out and the new mold was given a different number. If it fits, it can work, but you also have to consider outlet diameter, total volume and so forth.