[HR9121]

I used a Willy's a few times when I was running some index races and it worked really well for me. Only problem I ever had was the threaded part started loosening and the vibration would cause it to open, someone told me about putting a little locktite on the threads and never had another issue. I did use it at a couple division races in hot rod and it was very dialable, my car was a slower car so the loss of mph was not an issue to me because I was used to looking over my shoulder 98% of the time anyway.