YOU ARE BIDDING ON A HKS SEQUENTIAL BLOW OFF VALVE.  THIS IOS FROM AN ESTATE AND I DO NOT HAVE A WAY TO TEST SO IT IS BEING SOLD AS FOUND UNTESTED FOR PARTS OR RESTORATION, AS SHOWN. PLEASE LOOK AT ALL PHOTOS AND ASK ANY QUESTIONS YOU MAY HAVE. REMEMBER THAT I SELL MOSTLY ANTIQUE AND VINTAGE ITEMS AND THAT THEY ARE MOSTLY LIKELY NOT BE PERFECT DO TO THE NATURE OF THEIR AGE. IF YOU HAVE A PROBLEM PLEASE CONTACT ME BEFORE LEAVING FEEDBACK.