The tenative weights are 360 senior 390 masters 420 heavy. 375 if running one class like we are at New Castle next week. The price of the engines are $4200-$4500. All three engines, the new Biland, Vampire and Oral are available from the importer “Engines 4 Racing”, (IMI Motorsports company). We will have a web site up when I get back from Monaco http://www.engines4racing.com. The engines are approved for the new TAG 4-stroke class by TAGUSA and will be running all on their own as they have too much power to compete with the 2 strokers. These engines ROCK, 34HP, 13,000rpm, sound cool and they last long too!!!