As it states. B series Stainless runners Mild Steel flanges. A/C and P/S compatible. Some chassis will need a slim fan with a large compressor housing turbo. Fully TIG welded, T3 flanged. First reasonable offer gets it!! Needs to go! I can add an external wastegate if needed. I also have a chipped PR4 for sale. It was converted to VTEC but throws a VTEC code so I am selling it as a chipped PR4 with no VTEC. Works great as a NON VTEC unit. I tested it this morning. $65 shipped takes it!