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Sierra International 18-5274 Tune Up Kit - Mercury Thunderbolt HEI-V6The Sierra 18-5274 Tune Up Kit is interchangeable with the following: GLM 71790, Mallory 9-29317. Each Sierra product meets or exceeds the original equipment part it replaces. Contains 18-5432 Rotor Assembly, 18-5396 Distributor Cap.$20.35$28.99
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