Please redirect to the thread and read. MFactory is gauge interest for stronger transmission gears.
http://www.mazdas247.com/forum/showthread.php?123831775-GI-Stronger-Gear-Set-for-the-MP-MSP
http://www.mazdas247.com/forum/showthread.php?123831775-GI-Stronger-Gear-Set-for-the-MP-MSP