Yes all Chains strech over time the most important is check the chain occasionally for slackness once the chain starts getting slack replace it and the tenisor idler sprocket(OEM timeing chain kits are the best as they come everthing that needs to replaced to ensure reliability).Dont worry its just there is no way that chain wont strech in 100,000 miles but im getting one too to get the manual so with proper and diligent maintanence it will be okay.?
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