Any experience this? Ordered Drag Specialties twin cam filter w/nut by mistake on the Lake Shore site and had a BIG reduction in valve train noise. These are cheaply made in China. Drag says 10 micron paper element. I usually use the HD 5 micron and the K&N occasionally . I switched back a few times to make sure and it's a quieter motor with the Chinese filter. I have 95000 mi on a 95 ,37g build. All I can think of is maybe my lifter bores are worn and the Drag filter flows so much more than stock that it makes a difference. I hate putting junk on my motor but I'm tempted to buy these again because quiet was nice while it lasted. I have the stock filter back on and I miss the cheap piece of crap filter. They also cost the same as the Harley Black,so price isn't a factor.