1996 article about a modified gs500 racer

[Codoloco]

http://www.eurospares.com/munn.htm
Ram air system, front air scoop

..."The bike runs on stock GS500 rims which are lighter than GSX-R wheels. They measure 3" at the front and 3 1/2" at the rear and Rich usually runs Metzlers on which he has set several lap records at Willow Springs International Raceway [the BoTT Lightweight record is around 1:33 at Willow]. Munn laid up the fiberglass air-box himself. It features a ram-air system with a fiberglass scoop under the GSX-R numberplate. Twin heat riser tubes run from the numberplate scoop to the frame-rails into which Rich cut holes using a die-grinder. The airbox is then connected to the frame for a positive induction system. The engine features a windage tray, which keeps power-robbing oil away from the crank, and positive crankcase ventilation, which helps the rings seal better and thereby increases compression. Rich says that National City has 25 hours into porting the head, which also has 1 mm-over stainless valves."

[The Buddha]

Oh yea and look for Cedric Smith's CSXR (Cedric Smith Xperimental Racer) that ran a GSXR 4 valve head and a bunch of other mods, where he also ran a 580cc overbored with 4 valve pistons sourced from a F1 ferrari (no idea what year and model).
Damn cool rolling work of art.
Cool.
Buddha.