I meant mix and matching transmission and engine. For example pairing up a B16a transmission with a b18c1 motor or jdm b18c motor. I know for sure in California you can bar a jdm b18c motor. I'm curious because i want to pair up a b16a transmission with either a b18c1(GSR motor) or jdm b18c(type R motor). It's just cheaper that way and b16a tranny still has short gearing.

 

The ref doesnt care at all what transmission your car has installed. They're reffing the engine only.

 

thanks. makes sense.