Replacement Ignitor Ii Module For All Flame-Thrower "Stock-Look" 4 & 6-Cylinder 45D Style Distributors. Replacement Ignitor II module for Flame-Thrower billet or cast distributor. Adaptive dwell maintains peak energy throughout the entire RPM range, reducing misfires while improving engine performance. Develops on average 4 times more available energy between 3000 and 5000 RPM, and 2 times more available plug voltage. Compensates for inherent electronic delay by adjusting the spark timing throughout the entire RPM range.Synchronized peak current and spark timing reduces heat build-up. WARNING : This product can expose you to chemicals including Styrene, which is known to the State of California to cause cancer.