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 # 5019 LTR5GP
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    NGK Spark Plug Stock # 5019 LTR5GP
    $7.49 USD
    $7.49 USD
    NGK Spark Plug Stock # 5019 LTR5GP 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 # 6208 LR8B
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    NGK Spark Plug Stock # 6208 LR8B
    $5.29 USD
    $5.29 USD
    NGK Spark Plug Stock # 6208 LR8B is a NGK spark plugs designed to support consistent ignition performance, dependable combustion, and proper service replacement on compatible applications. This lis...
  • NGK V-power Plugs Stock 2851 GR5
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    NGK V-power Plugs Stock 2851 GR5
    $4.49 USD
    $4.49 USD
    NGK V-power Plugs Stock 2851 GR5 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 # 5463 FR5AP-11
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    NGK Spark Plug Stock # 5463 FR5AP-11
    $8.49 USD
    $8.49 USD
    NGK Spark Plug Stock # 5463 FR5AP-11 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 # 7162 (motorcycle/marine) DR8EA
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    NGK Spark Plug Stock # 7162 (motorcycle/marine) DR8EA
    $3.99 USD
    $3.99 USD
    NGK Spark Plug Stock # 7162 (motorcycle/marine) DR8EA is a NGK spark plugs designed to support consistent ignition performance, dependable combustion, and proper service replacement on compatible a...
  • NGK Spark Plug Stock # 4548 CR9EK
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    NGK Spark Plug Stock # 4548 CR9EK
    $11.99 USD
    $11.99 USD
    NGK Spark Plug Stock # 4548 CR9EK is a NGK spark plugs designed to support consistent ignition performance, dependable combustion, and proper service replacement on compatible applications. This li...
  • NGK Spark Plug Stock # 6955 CR9EB
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    NGK Spark Plug Stock # 6955 CR9EB
    $7.99 USD
    $7.99 USD
    NGK Spark Plug Stock # 6955 CR9EB is a NGK spark plugs designed to support consistent ignition performance, dependable combustion, and proper service replacement on compatible applications. This li...
  • NGK Spark Plug Stock # 3365 CMR6H
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    NGK Spark Plug Stock # 3365 CMR6H
    $6.29 USD
    $6.29 USD
    NGK Spark Plug Stock # 3365 CMR6H is a NGK spark plugs designed to support consistent ignition performance, dependable combustion, and proper service replacement on compatible applications. This li...
  • NGK Spark Plug Stock # 3194 BR9ESSOLID
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    NGK Spark Plug Stock # 3194 BR9ESSOLID
    $4.69 USD
    $4.69 USD
    NGK Spark Plug Stock # 3194 BR9ESSOLID 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 # 3230 BR9EG
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    NGK Spark Plug Stock # 3230 BR9EG
    $7.99 USD
    $7.99 USD
    NGK Spark Plug Stock # 3230 BR9EG is a NGK spark plugs designed to support consistent ignition performance, dependable combustion, and proper service replacement on compatible applications. This li...
  • NGK Spark Plug Stock # 2329 BR8EQ-14
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    NGK Spark Plug Stock # 2329 BR8EQ-14
    $9.99 USD
    $9.99 USD
    NGK Spark Plug Stock # 2329 BR8EQ-14 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 3133 BPZ8HS-10
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    NGK Spark Plug Stock 3133 BPZ8HS-10
    $12.99 USD
    $12.99 USD
    NGK Spark Plug Stock 3133 BPZ8HS-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 # 4055 (motorcycle) BPR7EIX
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    NGK Spark Plug Stock # 4055 (motorcycle) BPR7EIX
    $10.99 USD
    $10.99 USD
    NGK Spark Plug Stock # 4055 (motorcycle) BPR7EIX is a NGK spark plugs designed to support consistent ignition performance, dependable combustion, and proper service replacement on compatible applic...
  • NGK Spark Plug Stock 7734 BPR5ES
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    NGK Spark Plug Stock 7734 BPR5ES
    $3.99 USD
    $3.99 USD
    NGK Spark Plug Stock 7734 BPR5ES 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 2668 BKR8EIX
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    NGK Spark Plug Stock 2668 BKR8EIX
    $9.99 USD
    $9.99 USD
    NGK Spark Plug Stock 2668 BKR8EIX is a NGK spark plugs designed to support consistent ignition performance, dependable combustion, and proper service replacement on compatible applications. This li...
  • NGK Spark Plug Stock # 4644 BKR7E
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    NGK Spark Plug Stock # 4644 BKR7E
    $3.49 USD
    $3.49 USD
    NGK Spark Plug Stock # 4644 BKR7E is a NGK spark plugs designed to support consistent ignition performance, dependable combustion, and proper service replacement on compatible applications. This li...

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