APR Iridium Pro Spark Plugs are the excellent upgrade for tuned engines. Our spark plugs are made from Iridium, which is one of the strongest materials you can use in this type of application. They run cooler, resist preignition, last longer than other materials with higher melting points, and even require less voltage to produce a strong spark. The electrode is harder and stronger than other materials, can dissipate heat more easily, is better protected from melting, cracking, and other limitations found with standard plugs. These plugs were designed for use on tuned and higher output vehicles that benefit from a plug cooler than the factory heat range. They are great for high boost, high cylinder pressure, high cylinder temperatures, and high power situations, and they pair nicely with a set of APR ignition coils, where applicable.

Features:
APR Iridium Pro Spark Plugs are the excellent upgrade for tuned engines. Our spark plugs are made from Iridium, which is one of the strongest materials you can use in this type of application. They run cooler, resist preignition, last longer than other materials with higher melting points, and even require less voltage to produce a strong spark. The electrode is harder and stronger than other materials, can dissipate heat more easily, is better protected from melting, cracking, and other limitations found with standard plugs. These plugs were designed for use on tuned and higher output vehicles that benefit from a plug cooler than the factory heat range. They are great for high boost, high cylinder pressure, high cylinder temperatures, and high power situations, and they pair nicely with a set of APR ignition coils, where applicable.

More From This Category

MANLEY Pushrod, Swedged End, 4130 Chromoly, 5/16 in. Dia, 9.250 in. Length, .080 in. Wall, Set of 16

MANLEY Pushrod, Swedged End, 4130 Chromoly, 5/16 in. Dia, 9.250 in. Length, .080 in. Wall, Set of 16

$387.75

MANLEY Valve, Titanium, Intake, Bead Loc, 2.23 in. Head Dia, 0.311 in. Stem Dia, 6.25 in. Length, Each

MANLEY Valve, Titanium, Intake, Bead Loc, 2.23 in. Head Dia, 0.311 in. Stem Dia, 6.25 in. Length, Each

$399.71

MANLEY Piston, Extreme Duty, 1.200 in. Compression Distance, 3.582 in. Bore Size, -28cc Dish, For Ford 4.6L, Set of 8

MANLEY Piston, Extreme Duty, 1.200 in. Compression Distance, 3.582 in. Bore Size, -28cc Dish, For Ford 4.6L, Set of 8

$2,343.36

MILODON Valves, Exhaust, Stainless Steel, 1.725 in. Diameter, For Ford, Big Block, 429 - 460, Set of 8

MILODON Valves, Exhaust, Stainless Steel, 1.725 in. Diameter, For Ford, Big Block, 429 - 460, Set of 8

$395.72

KB Piston, 4 in. Bore, For Chrysler 360 Rod 6.123 Step Dish +18cc 2V, .040 Oversized, w/ Rings, Each

KB Piston, 4 in. Bore, For Chrysler 360 Rod 6.123 Step Dish +18cc 2V, .040 Oversized, w/ Rings, Each

$1,074.90