Originally Posted by Bulldogger
The SL55 forces air into the boxes once moving, also the SL55 allow for two openings to feed air into the engine where as the needswings utilizes only one. I do agree with the supercharger pulley though.
I say two stock cars with just intakes take it to the track for a side by side. I'll put up 5 bucks the NW wins everytime by at least a tenth.