Thanks for the interest in our products. We have been building XP1K engines as fast as we can, and we still can't keep up. Most of the race related stuff we've been doing is based around high compression standard bore. We are doing ported heads with oversized exhaust valves, intake modifications, exhaust systems, and clutch work. Also, we are days away from having out 1,110cc big bore kits ready to go. We are teamed up with Cognito Motorsports for the 2014 BITD season, so we are building all their new XP1K desert stuff. Please let us know if you have anymore questions!