This is a use set of R07valve springs this is 16 intake valve springs and this is exactly how i received it from Hendrick motorsports they were used on Dale Earnhardt Junior’s car where he had a engine failure during testing at Chicago in 2015 All information including dyno cycles track and total cycles are included. These are a nice piece of racing history to add to your collection. Check out all the pictures as this is the exact set you will receive. we are offering this set with no reserve. Thanks for looking and good luck!!!! The exhaust and intake springs are different sizes I cannot find much information on what happened during this test the date on the box is 7/17/15 and the comments say 160138 broken IN#7 though I do not see damage on the no 7 intake valve spring
