[undy]

At the time I did my setup SD made a filter that was 2 1/8" tall vs K&N's 1 3/4" tall filter and that's the one I used. That's a bit over 20% air flow without the lid filter. I'm running a KC 482" side-oiler so I need all the air flow I can get. My carbs are custom built Quick Fuel 750s.