Check the listing for details. Distributor Cap Rotor Wisconsin Engine TJD fits Perlux ONLY. Condition: New – Open box. Listed at 42.95 USD. New Cap and Rotor for electronic distributor used on Wisconsin TJD engines. This cap/rotor will only fit TJD engines with electronic distributors. Use the pictures as a guide, your cap should have a round or oblong vent port as shown and will have two plug wire towers plugged or only two towers. If your existing cap doesn't look like either of the caps pictured, this cap will not fit. The cap will have two plug wire towers plugged as shown in the first picture. Wisconsin used various distributors and this cap/rotor will only fit electronic distributors made by Perlux or Pertronix. This cap and rotor WILL NOT fit a points type distributor or a points distributor that has been converted to electronic. Please check your distributor carefully and compare your cap and rotor with the picture. Questions welcome and encouraged, we want to make sure you get the right part. Thanks for stopping by and please check out our other items.