Our Summit Racing™ Ready-to-Run billet distributors provide reliable spark throughout the rpm range, so they'll deliver the performance you need, no matter what you drive--race car, street machine, or hauler. The affordable distributors have high-dollar features that outperform the competition, like a lightweight aluminum housing that's precision CNC-machined for strength and stability, polished steel shafts with sealed ball bearings for stable operation through 10,000 rpm, and a maintenance-free, high-output magnetic trigger for accurate and reliable performance. The distributors have a black alkyd cap and some models also feature vacuum advance. An ignition box is not required for use with Summit Racing™ Ready-to-Run billet distributors except when used with an aftermarket EFI system.