This distributor is designed for severe duty racing applications using the Buick V6 even-fire engine. The distributor features a billet housing machined from a solid piece of aluminum for closer tolerances and higher strength. Other features include a 0.500” QPQ-coated steel shaft and two ball bearings for smooth operation. A high-output magnetic pick-up provides extremely accurate timing signals and never requires adjustment. A heavy-duty cap features brass terminals for full spark delivery. This cap also bolts down to prevent breakage caused by excessive vibration.There is an adjustable mechanical advance assembly. MSD provides a selection of advance springs and stop bushings so you can create a timing curve for your Buick.