what solinoid woukd I look for???

[MazdaAspec]

I have a B20B swap with a b16a head. So am I looking for a solinoid to fit a B20B or a B16a???

 

[BrutalB83]

Which solenoid are you talking about? The VTEC solenoid? If it's the VTEC solenoid, then the answer should be obvious. There were no VTEC B20s from the factory.