Description
Spark Plug
ACDELCO part number R43T refers to a specific type of spark plug. Here’s what it generally means:
Brand: ACDELCO
Part Number: R43T
Type: Resistor spark plug
Thread Size: Typically 14 mm
Reach: Around 0.437″ (11.1 mm)
Heat Range: 43 (medium heat range in ACDELCO’s system)
Tip Style: Projected tip
Applications: Commonly used in older GM engines, classic cars, and some
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