$6.49 per plug. Sold by the box of 4. Order 2 for your V8.
E3.52 is a 14mm, 0.375” reach plug with a gasket seat. It fits a wide variety of GM applications from the 50’s to early 80’s, and is generally the correct plug for Pontiac Cast Iron heads through 1971. 13/16 spark plug socket. In 1972 Pontiac went to the tapered seat 5/8 "peanut plug". Use E3.42 for 1972 and later Pontiac Cast Iron heads. E3 automotive plugs have three legs securing the DiamondFIRE electrode to the shell. This allows for excellent heat transfer, and helps to create more turbulence in the cylinder. The patented DiamondFIRE side wire is proven to increase power, reduce fuel consumption and improve hydrocarbon emissions in long-term use. The unique ground electrode and full-size center electrode also provides optimal performance for a guaranteed five years or 100,000 miles.
Part Number: E3.52
Hex Size: 13/16"
Thread Reach: 0.375"
Thread Diameter: 14mm
Tip/Gap: DiamondFIRE Fixed Gap Cannot Be Adjusted