i'm lookin for a piston in either 81.5 or 82 bore that will yield between a high 10 and a low12 comp ratio in a b16a with a stock gasket, can't afford the todas, i was leaning towar the topline ITR oem replicas, but the damn compression would put me back on 87 oct. i've heard people mention 81.5 and 82 CTR replicas, but i've never seen them anywhere. recomendations would be appreciated.