Nice looking carbs Michael. The last set of race HS6s I built I used a customer supplied Maniflow intake, I have to say I like the Lynx aluminum intake better after working wth both, you have to make your own throttle linkage bar, but I like being able to do more porting to the cast aluminum intake, with the tubing ones, you can clean them up, but thats about it, since it is a piece of pipe. These carbs will use the K&N RU-4110 univiersal cone filter like these, they flow great and are real easy to get on and off in a hurry, we disign the velocity stack to 3.5' in diameter to accept the K&N filter. Also here's a couple of shot of the HSs set for a spridget 1275 I did a while back using the Miniflow intake, the velocity stacsk are basicly the same, but these were made by somen else out of nylon, I likes the idea of maing them out of aluminum, so we tweaked the desing and bit and made a run of aluminum ones.