Just trying to see if anybody can help me trying to figure out if I can use the stock integra post mount bracket that on the engine already to bolt up to the D to B mounts...I know the rear T bracket needs to be replaced with a SI T bracket but do I need a SI post mount bracket or is the 1 on the b18b that came attached to the motor already fine to use...Thanks for any advice

 

A stock B18B has a 3-bolt bracket on it. The Civic Si uses a 2-bolt bracket, and stock mounts will need this bracket to match up. So assuming your bracket is the original one that came with the engine... it will NOT work.