The rules for DMAA Sportsman Goodyear have changed. The SH 15 (only) venturi size has been increased to .266". New red anodized venturis are now available from Bill Bischoff for $10 each, plus $6 postage for up to 3 venturis. Except for the color and the ID, they are outwardly identical to the blue venturis for the Magnum and ASP 15. Post a message here or send a PM to order.