OEM Toyota – Fits FJ40/45, FJ55 – 9/1977 – 12/1978 Time and general use will take its toll on your ignition system. Corrosion buildup on the distributor cap terminals can cause weak spark, erratic operation, even misfires. Replace the distributor cap as a part of your complete ignition tune-up to get the best efficiency possible! – Original cap, comes with captive screws for fastening to distributor housing. – Cylinder numbers marked into cap for a guess-free installation.