[F6HAD]

Ah, I never realised that the CTR calipers were single piston..

Coste is right though, although I can't find the link anymore, I distinctly remember back in the days when we were running THAOC, one of the Irish lads fitted CTR calipers to his 7th gen Accord... so there's a strong chance those twin piston calipers from the ATR will fit - just make sure you get the carriers with them mate!

 

[F6HAD]

Not sure on the Civic but on the Accord I went from standard single piston front calipers over a 300mm disc to twin piston Accord Type R (Nissin) calipers over the same 300mm disc... and the difference is staggering!

I can only imagine how good it is moving from a 280mm disc with presumably single piston to 320mm? and possibly twin piston.