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 # 4482 R6725-115
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    NGK Spark Plug Stock # 4482 R6725-115
    $56.99 USD
    $56.99 USD
    NGK Spark Plug Stock # 4482 R6725-115 is a NGK spark plugs designed to support consistent ignition performance, dependable combustion, and proper service replacement on compatible applications. Thi...
  • NGK V-power Racing Plug 2891 R5670-7
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    NGK V-power Racing Plug 2891 R5670-7
    $6.99 USD
    $6.99 USD
    NGK V-power Racing Plug 2891 R5670-7 is a NGK spark plugs designed to support consistent ignition performance, dependable combustion, and proper service replacement on compatible applications. This...
  • NGK V-power Racing Plug 2746 R5670-6
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    NGK V-power Racing Plug 2746 R5670-6
    $10.99 USD
    $10.99 USD
    NGK V-power Racing Plug 2746 R5670-6 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 # 94705 LKR7BHX
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    NGK Spark Plug Stock # 94705 LKR7BHX
    $15.99 USD
    $15.99 USD
    NGK Spark Plug Stock # 94705 LKR7BHX 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 # 6994 IZFR6K11
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    NGK Spark Plug Stock # 6994 IZFR6K11
    $12.49 USD
    $12.49 USD
    NGK Spark Plug Stock # 6994 IZFR6K11 is a NGK spark plugs designed to support consistent ignition performance, dependable combustion, and proper service replacement on compatible applications. This...
  • NGK V-power Plugs Stock 2635 GR4
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    NGK V-power Plugs Stock 2635 GR4
    $3.69 USD
    $3.69 USD
    NGK V-power Plugs Stock 2635 GR4 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 # 1598 FR2B-D
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    NGK Spark Plug Stock # 1598 FR2B-D
    $5.99 USD
    $5.99 USD
    NGK Spark Plug Stock # 1598 FR2B-D 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 # 4323 BR6FS
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    NGK Spark Plug Stock # 4323 BR6FS
    $3.99 USD
    $3.99 USD
    NGK Spark Plug Stock # 4323 BR6FS 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 3623 BPR6EFS
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    NGK Spark Plug Stock 3623 BPR6EFS
    $6.49 USD
    $6.49 USD
    NGK Spark Plug Stock 3623 BPR6EFS 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 # 2015 BPR2ESSOLID
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    NGK Spark Plug Stock # 2015 BPR2ESSOLID
    $3.49 USD
    $3.49 USD
    NGK Spark Plug Stock # 2015 BPR2ESSOLID is a NGK spark plugs designed to support consistent ignition performance, dependable combustion, and proper service replacement on compatible applications. T...
  • NGK Spark Plug Stock # 2382 BKR5ES-11
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    NGK Spark Plug Stock # 2382 BKR5ES-11
    $6.99 USD
    $6.99 USD
    NGK Spark Plug Stock # 2382 BKR5ES-11 is a NGK spark plugs designed to support consistent ignition performance, dependable combustion, and proper service replacement on compatible applications. Thi...
  • NGK Spark Plug Stock # 6130 BCPR5ES
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    NGK Spark Plug Stock # 6130 BCPR5ES
    $3.99 USD
    $3.99 USD
    NGK Spark Plug Stock # 6130 BCPR5ES 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 # 4652 WR4-1
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    NGK Spark Plug Stock # 4652 WR4-1
    $4.99 USD
    $4.99 USD
    NGK Spark Plug Stock # 4652 WR4-1 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 # 4017 R6601-10
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    NGK Spark Plug Stock # 4017 R6601-10
    $32.99 USD
    $32.99 USD
    NGK Spark Plug Stock # 4017 R6601-10 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 # 2741 R6252K-105
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    NGK Spark Plug Stock # 2741 R6252K-105
    $10.99 USD
    $10.99 USD
    NGK Spark Plug Stock # 2741 R6252K-105 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 # 2773 R6061-11
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    NGK Spark Plug Stock # 2773 R6061-11
    $14.99 USD
    $14.99 USD
    NGK Spark Plug Stock # 2773 R6061-11 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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