A lot of people favor the smaller sized combustion chamber of the P72 GSR head, while others such as B16 head as it permits the higher-flowing ITR manifold to bolt on directly. Either way, any DOHC VTEC cylinder head will get the job done. Ordinarily these transmissions have had weak synchro's in 2nd, 3rd, and 4th gears with 3rd gears crunching th