The dial is based on the streamline designs of the 40's and 50's

where applicable:

The Kutback exhausts from Blow Performance are designed to work with the exhaust inertia pulse and give a broad power band on 80CI – 131CI Evolution Big Twin

Spring-loaded ball-stop detent secures the pin in place

goodridge stat o seal brake line washers 10 pack 7OM The dial is based onGoodridge Stat O Seal Brake Line Washers 10 pack Aluminium crush washers bonded to a synthetic rubber o ring. Used in combination with a banjo bolt and banjo fitting. Sold in packs of 10 Available in 3 8" (10mm) or 7 16" (11mm) Temperature range 30C up to 233C