ACDelco Spark Plug R45LTS6 (GM Part #5614224)

$34.99

type: Unknown Type
Vendor: CorvairFarmer

Description:

🔧 Part Overview

  • Part Number: R45LTS6

  • GM Part Number: 5614224

  • Type: Copper core resistor spark plug

  • Thread Size: 14mm x 1.25mm

  • Seat Type: Tapered

  • Reach: Approx. 17–19mm (0.680"–0.75")

  • Hex Size: 5/8" or 13/16" depending on production batch

  • Terminal: Fixed

  • Electrode Material: Copper core with nickel alloy ground electrode

  • Resistor Type: Yes

  • Country of Origin: Typically marked “Made in USA”


🚗 Specific Applications

The R45LTS6 plug was commonly used in:

  • 1980s–1990s GM vehicles including Chevrolet, Pontiac, Oldsmobile, Buick, and Cadillac

  • Small-block and big-block V8 engines (305, 350, 400, 454 CI)

  • 3.8L Buick V6 engines (e.g., Regal, Century, LeSabre, Park Avenue)

  • Marine engines (MerCruiser, OMC, Volvo Penta)

  • Industrial and agricultural engines

  • Classic hot rods and performance builds using 14mm tapered seat heads