DENSO T20TT Spark Plug for MerCruiser and Volvo Penta Engines. Compatible with MerCruiser V6 and V8 engines (4.3, 5.0, 5.7, 7.4) from 1991 to 2006, and Volvo Penta 3.0L, V6, and V8 engines (4.3, 5.0, 5.7, 5.8, 7.4). Designed for optimal ignition performance and reliability in marine applications.
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