Hey McNut,
I think NOS stands for "Non-Oval Pipe."
Anyway, they got back to me:
Thanks for your reply the 2104 690 does not need a remapp with the wings. Either core will work great! Only if you modify or remove the air box will it need a remapp. This is not worth the effort as the gain is small and increase the fuel consumption too much. We offer the DNA air filter 90$ and doesnt need a reampp plus 3 HP. This is more then the mod lid offers without the hassel of remapp. I will reserve a pipe for you. Let me know about the DNA filter! I havent tried the cable on the 2104 yet. What is your plan to use this bike for? Thanks kenny darvin!So really, I'd imagine that the pipe will save weight, be cooler (to the touch), and sound cool. BTW, in my response I told him I intended to use the bike for "general hooliganism."
IS ANYONE INTERESTED IN A GROUP BUY? I'll bet they'd give us a break if we could guarantee an order of 5 or more.