Steeda subframe connectors
The Steeda kit does come with the cross braces that bolt to the seats. They come in bare steel part #555-5245 or zinc plated part #555-5246. I put the zinc plated ones on mine. It took the shop about 1 1/2 hours to do the job. They also come with a plate for the torque box area that joins the 3 separate pieces into one. They are a very nice package. The prices are $129.95 and $159.95.