This is a pair of brand new Harland Sharp valve train stud girdles that fit small block Chevy heads with standard stud spacing. These are designed to clamp onto polylocks. Great for any engine with serious valve spring pressures and/or will see lots of high RPM usage. Price is $100 cash. Located in Mound House. Please make sure you do your research to see if these will work for your application BEFORE you reply to this ad. Please also make sure you include your phone number in your email reply or you will not get a response. Thanks for looking.