The is a required upgrade kit for early users of the 2400-L series starters it is a 15 minute external installation. It provides a positive ground and improves the rigidity of the left hand bracket. Improves the clamping force that holds the starter’s adjustment to the ring gear. If you are ordering a starter kit now, you do not need this part, it is included in all the Starter Kits shipped since mid 2019. Made in the USA.
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