SP1 INDEXING WASHER KIT 3-CYLINDER 12/PK

Highlights

• Indexed spark plugs align the open end of the electrode toward the intake port The hottest flame meets the new fuel charge for a performance gain, increases fuel mileage and plug life This is a speed secret car racers have used for years You simply mark the electrode side of the plug with a magic marker on the porcelain You then shim the plugs with the washers to align the electrodes toward the intake ports Note: Fits 14mm threaded spark plugs.