Sorry was not sure where to post. Thanks Zippy1, was on CCspecialties site and they listed the same part # you posted, but they had a IH109037-C2 for a Quiet line series w/ a large filler hole. Both are 6" in length with gauge. That's where my question started from. LOL I assumed the Quiet line series would all be the same. Thanks was just trying to make sure I had the correct cap size. I will order the small one. PO has one on there but believe it is not the right fit.
