Bob R
Living Legend
The problem with the under seat airfilter is the torturous route the air takes to get into the air box (intake is on bottom of seat pan) and then out to the plenum. Out of the airbox it takes a strange route up into the plenum. By going with a RamAir or triple K&Ns (different systems) you get a much smoother airflow IMO. That will also open up your airbox for storage or relocation of the overflow bottle. When I put the RamAir on I did a new tune and put it on the Dyno, the dyno, same tuner and only change was the RamAir in place of the stock air filter and air delivery route gave me nearly 11 HP. In HP world 11 HP for 100 dollars (at the time) was a pretty good investment. I have a tune, TORS and RamAir. To get any more HP I will need to spend the big bucks (headers).
bob
bob