Spark Plug for 1968-1978 Dodge Charger & More - Accel 0437S-4

Gain valuable air gap between hot headers and your plug boots with the ACCEL spark plug 0437S-4, a U-Groove header plug in ACCEL's patented, race-proven Shorty configuration. It fits many vehicles, among them the 1959-1970 Chevrolet Impala 4.6L / 5.0L / 5.3L / 5.4L / 5.7L, 1968-1978 Dodge Charger 6.3L / 6.6L / 7.2L and 1961-1966 Chevrolet Suburban 4.6L / 5.3L. Listed engines include the L6-3.8L, V6-3.7L, V6-5.0L and a wide range of V8s, from the V8-4.3L to the V8-7.5L. See the "Vehicles it fits" section for the full list.

ACCEL shorty spark plugs are 3/16 in. to 3/8 in. shorter overall, depending on the plug. The shorter length opens up the air gap between the spark plug boot and the exhaust manifold or header tube. That room is intended to help prevent a burned boot or a dimpled header tube. The shorter body can also ease installation and removal where there is little space for a socket or wrench.

• Copper core: Copper is a better conductor than platinum or iridium. The core is designed to deliver a strong spark, especially under high combustion pressures. It also dissipates heat well, which helps lessen the chance of a misfire.
• Gapable: Open the gap for a larger flame kernel, or close it if needed for high-boost use. The listed gap size is 0.035 in.
• Machine-rolled threads: For more precise thread engagement and torque retention.
• Specs: 14mm thread, .375 in. reach, heat range 6, flat/gasket seat, 13/16 in. hex, projected tip, resistor, C-cut ground electrode.

Sold as a package of 4. Country of origin: Czech Republic.