Fits 1959-up Mopar 6 or 8-cylinder with Points Ignition

One of the best, and sometimes missed tuning tricks for your Dodge, Plymouth or Chrysler is not to just optimize your initial timing, but to bring in timing advance more quickly than the stock distributor springs can allow. Bringing timing more quickly than stock can provide substantial increases in both torque and horsepower depending on your combination. This is done by changing the springs under the cap with these lighter weight springs.