Manufacturer Part Number: XSF-SB350SP-B1, Material: Aluminum, Vintage Part: Yes, Finish: Natural Made from high grade aluminum, bronze valve guides, hardened seats, advance port design for greater air flow This head features a thicker deck design so they can be used on nitrous, turbocharged and supercharged applications OE/OEM Part Number: SB Chevy Aluminium Zylinderkopf 195cc SB Chevy Aluminum Cylinder Head 195cc 64cc Bare Straight Plug SB Chevrolet Motor Neu, Brand: XSFlow, Type: Cylinder Head, Manufacturer Warranty: 1 Year