Street Fire Chevrolet V8 GM Hei Distributor W/Black Cap Hei Distributor For The Value Conscious Enthusiast MSD IgnitionFor value conscious enthusiasts, the Street Fire HEI is a great choice! We know the importance of a centrifugal advance in a distributor so our engineers made sure that the Street Fire received an advance assembly with coated weights and welded weight pins (not just pressed in like other models). Another area that you cannot afford to scrimp on is with a distributor gear. The Street Fire is fit with the same gear that is used on our Pro Billet models.