I just picked up an E2 of Ebay for my '01 WR426 and wondering if anyone out there has the install instructions? The headpipe connection looks a lot different than on my E series. As a matter of fact it doesn't look like it will fit on my E headpipe which is a problem since I don't have the stock headpipe for the bike (anybody got one they want to sell???). Also the E2 came with 3 end cap/inserts - one small one, a larger one and one open insert which I'm guessing are quiet, not so quiet and really loud. Anyone know what the db specs are for these?