Well I have put some more tanks on my new B5. (About 15 total) I decreased the air gap to .5 and I'll tell you guys I love this engine. Its idling great and has excellent low end. Quite a bit more than the B7 IMO. The werks 30% is working good too. I timed two tanks the yesterday and I got 11 plus min with the 2013 pipe. So I would agree with the other posts, At 199.99 a pop..keep 'em coming.