Originally Posted by grizz1

Hi - The 0801 is nice on the 7 Port. It gives it quite a bit more bottom end snap, but you do loose a little on the top. Not that you notice it that much with the 7 Ports huge top end anyway

Short tight track or jumps straight out of corners - go for the 0801 on the 7 port.
Regular or long fast track, I would use the Dynamite Platinum 053. Not the latest model pipe on the market, but it compliments the 7 Port very nicely, and gives it a nice smooth power rush from start to finish.
Nothing wrong with the 2047 on the 7 Port either. It is the preferred pipe of a lot of peope, but I personally like the 053

Long and short LSN's are quite different. There was a picture on this thread but it has expired.
Open your throttle and look at the LSN. The long version stays in the spray bar even at full throttle. The short version will come out of the spray bar at some stage before you reach full throttle, depending on how you have it tuned. The long LSN tapers down to a long fine point and the short LSN has a more stubby rounded end. Hope that helps.