Main Jet Spring Kit

A 5-PIECE SPRING KIT that allows you to adjust the flow pressure in your Main Jet Bypass. This kit will allow you to go from 1 lb. to 16 lbs. and with the use of shims anywhere in between. The higher the pressure you have the more fuel pressure you’ll have at the nozzles. A trick used by the Drag Race Guys for years! The Higher Pressure Can Give You Better Throttle Response And Take Off On Starts!