Spotted this thread on the US Subaru BRZ forum - www.ft86club.com/forums/showthread.php?t=8374 - gives links to a selection of service manuals. These need to be treated with some caution (as they apply to the LHD BRZ, not the RHD GT86), but there's some interesting stuff in the service manual . . . for example, changing spark plugslooks like it's notfor the faint-hearted.