Spark Plugs & Ignition Wires

The spark plug is the last component in the ignition chain — and the one that actually ignites the charge. A plug that's the wrong heat range, worn beyond spec, or fouled from a rich mixture will cost power and cause misfires that no ignition box can compensate for. This collection covers spark plugs, ignition wire sets, spooled wire, plug boot kits, boot protectors, wire holders, distributor caps, distributor rotors, and all related ignition components built for maximum spark energy and reliable ignition on any engine combination.

Spark plugs are available in copper, platinum, and iridium electrode configurations across a full range of heat ranges for naturally aspirated, forced induction, and nitrous applications. Heat range selection is critical — a plug that's too hot causes pre-ignition and detonation on a performance engine; too cold and the plug fouls under light-load driving. Performance engines with elevated compression, forced induction, or nitrous typically require a colder plug than the factory specification. Projected tip designs improve ignitability under lean or high-velocity airflow conditions. Recessed tip designs protect the electrode in high-boost applications where a projected tip would be exposed to excessive heat.

Spark plug wire sets are the final link between the ignition coil and the plug. High-performance wire sets with spiral-wound or straight-wound conductors minimize radio frequency interference while maximizing energy delivery to the plug gap. Wire diameter — 8mm, 8.5mm, and 10mm — affects both suppression capability and current-carrying capacity. Matched wire sets are available for popular domestic V8 and six-cylinder applications in a range of colors and boot configurations to suit any engine bay layout. Spooled wire and boot kits allow custom-length wire fabrication for non-standard routing, engine swaps, and builds where off-the-shelf sets don't fit cleanly.

Plug boot protectors shield the boots from exhaust heat on tight header installations where the wire runs close to the primary tubes — a common failure point on performance builds with long-tube headers. Wire separators and holders keep the wire set organized, prevent contact between wires that can cause cross-fire, and give the engine bay a finished, professional appearance.

Distributor caps and rotors are wear items that should be inspected and replaced on a regular service interval — and immediately on any performance build where ignition reliability is a priority. Carbon tracking, worn contacts, and cracked caps cause misfires and timing scatter that degrade performance and can damage pistons on high-compression engines. Performance caps with brass terminals and vented designs improve durability and heat dissipation over standard OEM units.

This collection serves every engine combination — mild street rebuilds running stock plugs and OEM-style wires, high-compression naturally aspirated builds requiring colder plugs and high-energy wire sets, forced induction and nitrous applications demanding the correct plug heat range and gap for the power level, and classic restorations sourcing correct-style ignition components.

Spark plug and wire set replacement is one of the most accessible maintenance and performance tasks available — basic hand tools and 30–60 minutes cover most V8 applications. Always gap plugs to the manufacturer's specification for your specific ignition system and application before installation. Verify wire routing clears exhaust components before finalizing the installation.

Shop the full Spark Plugs & Ignition Wires collection and make sure every cylinder fires exactly as it should.

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  • NGK Spark Plug Stock # 7696 PZFR6H
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    NGK Spark Plug Stock # 7696 PZFR6H
    $16.99 USD
    $16.99 USD
    NGK Spark Plug Stock # 7696 PZFR6H is a NGK spark plugs designed to support consistent ignition performance, dependable combustion, and proper service replacement on compatible applications. This l...
  • NGK Spark Plug Stock # 90220 LTR5AHX
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    NGK Spark Plug Stock # 90220 LTR5AHX
    $13.49 USD
    $13.49 USD
    NGK Spark Plug Stock # 90220 LTR5AHX is a NGK spark plugs designed to support consistent ignition performance, dependable combustion, and proper service replacement on compatible applications. This...
  • NGK Spark Plug Stock # 6619 LFR6AIX-11
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    NGK Spark Plug Stock # 6619 LFR6AIX-11
    $8.99 USD
    $8.99 USD
    NGK Spark Plug Stock # 6619 LFR6AIX-11 is a NGK spark plugs designed to support consistent ignition performance, dependable combustion, and proper service replacement on compatible applications. Th...
  • NGK Spark Plug Stock # 6774 IZFR6K13
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    NGK Spark Plug Stock # 6774 IZFR6K13
    $13.49 USD
    $13.49 USD
    NGK Spark Plug Stock # 6774 IZFR6K13 is a NGK spark plugs designed to support consistent ignition performance, dependable combustion, and proper service replacement on compatible applications. This...
  • NGK Spark Plug Stock # 4904 ILFR6T11
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    NGK Spark Plug Stock # 4904 ILFR6T11
    $10.99 USD
    $10.99 USD
    NGK Spark Plug Stock # 4904 ILFR6T11 is a NGK spark plugs designed to support consistent ignition performance, dependable combustion, and proper service replacement on compatible applications. This...
  • Mopar Spark Plug Wire Set 340 Orange P4529797
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    Mopar
    Mopar Spark Plug Wire Set 340 Orange P4529797
    $44.99 USD
    $44.99 USD
    The Mopar Spark Plug Wire Set 340 Orange P4529797 is a spark plug wires designed for builders, installers, and enthusiasts who want dependable performance without guessing through incomplete produc...
  • NGK Spark Plug Stock # 6681 DR8EIX
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    NGK Spark Plug Stock # 6681 DR8EIX
    $11.99 USD
    $11.99 USD
    NGK Spark Plug Stock # 6681 DR8EIX is a NGK spark plugs designed to support consistent ignition performance, dependable combustion, and proper service replacement on compatible applications. This l...
  • NGK Spark Plug # 5129 DPR7EA-9
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    NGK Spark Plug # 5129 DPR7EA-9
    $3.49 USD
    $3.49 USD
    NGK Spark Plug # 5129 DPR7EA-9 is a NGK spark plugs designed to support consistent ignition performance, dependable combustion, and proper service replacement on compatible applications. This listi...
  • NGK Spark Plug Stock # 6535 CR5HSB
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    NGK Spark Plug Stock # 6535 CR5HSB
    $3.49 USD
    $3.49 USD
    NGK Spark Plug Stock # 6535 CR5HSB is a NGK spark plugs designed to support consistent ignition performance, dependable combustion, and proper service replacement on compatible applications. This l...
  • NGK Spark Plug Stock # 3981 BR9EIX
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    NGK
    NGK Spark Plug Stock # 3981 BR9EIX
    $11.99 USD
    $11.99 USD
    NGK Spark Plug Stock # 3981 BR9EIX is a NGK spark plugs designed to support consistent ignition performance, dependable combustion, and proper service replacement on compatible applications. This l...
  • NGK Spark Plug Stock 7131 BPR6ES
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    NGK Spark Plug Stock 7131 BPR6ES
    $3.69 USD
    $3.69 USD
    NGK Spark Plug Stock 7131 BPR6ES is a NGK spark plugs designed to support consistent ignition performance, dependable combustion, and proper service replacement on compatible applications. This lis...
  • NGK Spark Plug Stock # 5126 B8HS-10
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    NGK Spark Plug Stock # 5126 B8HS-10
    $3.99 USD
    $3.99 USD
    NGK Spark Plug Stock # 5126 B8HS-10 is a NGK spark plugs designed to support consistent ignition performance, dependable combustion, and proper service replacement on compatible applications. This ...
  • NGK Spark Plug Stock # 3323 AR6FS
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    NGK Spark Plug Stock # 3323 AR6FS
    $4.69 USD
    $4.69 USD
    NGK Spark Plug Stock # 3323 AR6FS is a NGK spark plugs designed to support consistent ignition performance, dependable combustion, and proper service replacement on compatible applications. This li...
  • NGK V-power Plugs 2438 WR5
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    NGK V-power Plugs 2438 WR5
    $3.99 USD
    $3.99 USD
    NGK V-power Plugs 2438 WR5 is a NGK spark plugs designed to support consistent ignition performance, dependable combustion, and proper service replacement on compatible applications. This listing i...
  • NGK V-power Plugs 2238 TR5
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    NGK V-power Plugs 2238 TR5
    $3.99 USD
    $3.99 USD
    NGK V-power Plugs 2238 TR5 is a NGK spark plugs designed to support consistent ignition performance, dependable combustion, and proper service replacement on compatible applications. This listing i...
  • NGK V-power Racing Plug 3442 R5673-9
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    NGK V-power Racing Plug 3442 R5673-9
    $5.99 USD
    $5.99 USD
    NGK V-power Racing Plug 3442 R5673-9 is a NGK spark plugs designed to support consistent ignition performance, dependable combustion, and proper service replacement on compatible applications. This...

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