wiring differences rb20 and rb25

[cademfjohnson]

i currently have a silver top rb20, and when its time, i'm wanting to drop in a 25. is it plug and play as far as wiring? all i gotta do is driveshaft, mounts, crossmember, & intake mani clearance?

[Cjmartz2k]

Not even close to plug and play. Just start with a new harness. Also, if you are on a budget, you could always just drop in a 25 motor and keep the 20 transmission. If you are keeping the stock turbo, it'll hold up. Won't have to fix most of the stuff you mentioned that way when you swap.

[Wiring Specialties]

As mentioned above, the two engine harnesses (and transmission harnesses for that matter) are different. Converting one into the other is not ideal.

We can help you with an exchange, where you would send us the Rb20->S13 setup you have now and we willsend you a Rb25->S13 harness back that is ready to go.

If you are intersted, touch base with me off line.