Igniter II Conversion Kit Bosch 4-Cylinder

The Igniter II Conversion Kit Bosch 4-Cylinder is a modern electronic ignition system designed to replace aging points-and-condenser distributors in classic and vintage 4-cylinder engines. Built by Pertronix Ignition—a trusted manufacturer in the automotive restoration and performance space—this kit addresses a critical reliability gap that field-tested mechanics and serious enthusiasts know all too well. Original points-based ignition systems deteriorate with age, causing hard starts, inconsistent timing, and poor fuel economy. The Igniter II eliminates these variables with proven solid-state electronics, making it essential for anyone restoring or maintaining a classic Bosch 4-cylinder platform.

The kit uses an optical sensor and magnetic triggering system to replace mechanical contact points, delivering consistent spark timing across the entire RPM range without the wear and maintenance burden of traditional ignition. Unlike OEM points, which require regular gap adjustment and contact replacement, the Igniter II solid-state design operates maintenance-free with no adjustments needed. The compact module (4.8 × 1.7 × 5.8 inches, weighing only 0.2 lbs) mounts directly into the existing distributor housing, preserving your engine's original appearance while modernizing its electrical architecture. This approach maintains full compatibility with stock coils and wiring while dramatically improving cold-start performance and engine stability under load.

Restoration shops, vintage car owners, and mechanics who work on classic European and American 4-cylinder platforms rely on the Igniter II for its drop-in installation and immediate reliability gains. The system is particularly valuable for vehicles kept in storage or used seasonally, since it eliminates the spark-delivery inconsistency that plagues aged points systems. Installation requires no modifications to your distributor cap, rotor, or wiring harness—making it an ideal upgrade for purists who want modern reliability without cosmetic changes. Compatibility spans all Bosch-equipped 4-cylinder engines from the 1960s through early 1980s, including VW, Porsche, and other platforms that originally shipped with Bosch distributors.