i have a integra ls with a b18c obd1 swap what harness can i buy that i wouldn't have to make any modifications to it

 

It doesn't work that way... no matter what you do, VTEC, Knock, and IAB wiring have to be added to the chassis side of the engine harness shock tower junction on the passenger side and these wires must pass through the firewall down to the ECU plugs to be wired in.

If you are not comfortable with wiring, seek out a shop that can help.

 

I was saying a tuck harness like rywires harness

 

I take it you are using an OEM harness with a subharness for the VTEC related items?