Prelims and discussions:
http://www.improvedtouring.com/forums/showthread.php?t=29362
STO/STU: Misc classifications/allowances.
The biggie: Non-North American engines rejected by CRB.
http://www.improvedtouring.com/forums/showthread.php?t=29362
STO/STU: Misc classifications/allowances.
The biggie: Non-North American engines rejected by CRB.