I did another mod on this '52 FL.. remote oil filter, pipes, horn etc. (you can see the 'before' shots earlier in the blog). My customer got the pipes from Twisted Choppers - they're fine if you don't need to turn right... I shortened 'em 3 inches so now I can actually ride the thing. When fitting the pipes up in the first place there was also a small clearance issue - THE FRAME! They shaped the front pipe so that it goes right through the down tube.. nice.
Anyway, got all that sorted out & it's fine now.