Plug n Play billet distributors are designed for maximum ignition performance and easy installation all at a price you can afford. Replace your outdated points or electronic distributor with this performance proven distributor which features our patented Ignitor® II electronics or our all new next generation Ignitor® III electronics. All this in a CNC polished billet housing. Features: Integrated Ignitor II or Ignitor III technology with adaptive dwell control. Cobalt magnets and Hall Effect trigger for stable timing and precise spark distribution. A powerful micro controller with adaptive dwell algorithms constantly adjust the dwell angle to maintain peak energy throughout the entire RPM range for increased high and low RPM performance. Both the Ignitor II and Ignitor III compensates for the inherent electronic delay by adjusting the spark timing throughout the enter RPM range. Synchronized peak current and spark timing reduces heat build-up. Precision CNC machined billet housings are polished to a high luster. Tempered distributor shafts have low torsion displacement for accurate timing and longer life. Upper ball bearing and extra long oil impregnated bronze lower bushing work together to reduce friction and high RPM vibration. Precision stamped advance weights eliminate erratic timing. Adjustable mechanical advance with proprietary limiting functions permits multiple settings. Distributors are factory set with a performance advance curve and are provided with additional springs for custom advance curves. High dielectric strength cap with male or female brass terminals and premium rotor with brass contact. Compatible with most Capacitive Discharge Systems. Legal in all 50 states and Canada (C. A. R. B. E. O. #D-57-12). Note: Non vacuum advance distributors do not have an E. O. number and are not legal for sale or use on pollution controlled motor vehicles. Warranty: 30 months electronics / Limited 1 year mechanical. Flame-Thrower billet distributors are frequently used in tight engine compartments due to their Plug n' Play design and relatively small size. Although our distributors fit their intended engine application, each vehicle application must be evaluated independently to insure adequate space for distributor fitment as well as air cleaner and hood clearance.Pit Stop USA offers PerTronix Flame-Thrower Billet "Plug N Play" Distributor w/ Ignitor II® Module - Vacuum Advance - SB Ford 289-351W (Exc. 5.0L) - Female Cap D130701 at low everyday prices. Be sure to check out all of our products from PerTronix Performance Products including PerTronix Performance Products Pertronix Ford Distributors.