nuts on cat

[stuart wizy]

anybody know what threaded nuts are on standard cats?
Ive borrowed a cat of eddie with no nuts on it, they arnt m12 or m12 fine.
what the hell are they, mazdas own secret thread size!!
The last cat I put on the car I ended up running m12 die down each bolt because I couldnt get nuts for that one either!

[Timrxmotors]

M12 superfine! Best do what you did last time,run a die down them.

[MikeLMR]

same size as the engine mounting tappings in the block then. Took a while to track down some cap screws for those!

[stuart wizy]

M12 superfine! Best do what you did last time,run a die down them.

have you got 3 spare nuts tim, its eddies  cat you see,I would hate to give it him back with 3 threads left on each bolt!!
the cat on my car is blocked up or I hope it is,  I just need to try another cat on the car to check if it is blocked or not.
are you racing  this season by the way tim ?
cheers
stu