Speed6's also have a problem with a cracked clutch pedal. You either have to replace the pedal assembly or get someone to weld it.
Important! Check your clutch pedal!!! - Mazdaspeed Forums
Also, some K04 turbos found in the speeds have issues with smoking at idle. Some say it's bad turbo seals, some say it's due to poor pcv design. I never had any smoking with mine, but I replaced it with a BNR S3 turbo anyways.
Also, most products from SURE are garbage, especially their mounts. Stay away.
The VVT fix is like 1.4-2k from the dealership. Do a compression test as well.