Alex, glad that your liking the engine! If it has too much power try limiting the throtel opening. Say to 75-80% to start off with. This will limit the top end and allow you to lean the engine down to race tune. Both o which will help improve the run time like you are looking for. At the same time if you ever find that you need more power during the race you can easily click the end point adjustment up a bit while driving, giving you that extra power that you need. I would try this first before swapping the pipe. If you do go the 2056 (baseball bat) pipe please be carefull. The extech version is a chineese knock off and inhave heard from a lot of people about the internal baffle coming loose. This alters the back pressure potentialy causing it to run lean resulting in a toasted motor. Just an FYI but given the options after trying to limit the throtell opening I would probably try a 2057 if you still want to tame it down. Hope this helps!

Regards,

Ron