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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  • Vendor:
    NGK
    NGK Spark Plug Stock # 2262 ZFR5F-11
    Regular price
    $3.19 USD
    Regular price
    $3.19 USD
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    $3.19 USD
    NGK Spark Plug Stock # 2262 ZFR5F-11 is a NGK spark plugs designed to support consistent ignition performance, dependable combustion, and proper service replacement on compatible applications. This...
  • Vendor:
    NGK
    NGK Racing Spark Plug Stock #95811 R7448A-10
    Regular price
    $15.99 USD
    Regular price
    $15.99 USD
    Sale price
    $15.99 USD
    NGK Racing Spark Plug Stock #95811 R7448A-10 is a NGK spark plugs designed to support consistent ignition performance, dependable combustion, and proper service replacement on compatible applicatio...
  • Vendor:
    NGK
    NGK Spark Plug Stock # 7348 UR6IX
    Regular price
    $10.99 USD
    Regular price
    $10.99 USD
    Sale price
    $10.99 USD
    NGK Spark Plug Stock # 7348 UR6IX is a NGK spark plugs designed to support consistent ignition performance, dependable combustion, and proper service replacement on compatible applications. This li...
  • Vendor:
    NGK
    NGK Spark Plug Stock # 7913 SILFR6A
    Regular price
    $14.99 USD
    Regular price
    $14.99 USD
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    $14.99 USD
    NGK Spark Plug Stock # 7913 SILFR6A is a NGK spark plugs designed to support consistent ignition performance, dependable combustion, and proper service replacement on compatible applications. This ...
  • Vendor:
    NGK
    NGK Racing Plug # 4074 R6061-9
    Regular price
    $10.99 USD
    Regular price
    $10.99 USD
    Sale price
    $10.99 USD
    NGK Racing Plug # 4074 R6061-9 is a NGK spark plugs designed to support consistent ignition performance, dependable combustion, and proper service replacement on compatible applications. This listi...
  • Vendor:
    NGK
    NGK Spark Plug Stock # 5266 IZFR6K-11S
    Regular price
    $14.49 USD
    Regular price
    $14.49 USD
    Sale price
    $14.49 USD
    NGK Spark Plug Stock # 5266 IZFR6K-11S is a NGK spark plugs designed to support consistent ignition performance, dependable combustion, and proper service replacement on compatible applications. Th...
  • Vendor:
    NGK
    NGK Spark Plug Stock # 91784 LKAR8BHX
    Regular price
    $15.49 USD
    Regular price
    $15.49 USD
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    $15.49 USD
    NGK Spark Plug Stock # 91784 LKAR8BHX is a NGK spark plugs designed to support consistent ignition performance, dependable combustion, and proper service replacement on compatible applications. Thi...
  • Vendor:
    NGK
    NGK Spark Plug Stock # 91276 LTR6AHX
    Regular price
    $16.49 USD
    Regular price
    $16.49 USD
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    $16.49 USD
    NGK Spark Plug Stock # 91276 LTR6AHX is a NGK spark plugs designed to support consistent ignition performance, dependable combustion, and proper service replacement on compatible applications. This...
  • Vendor:
    NGK
    NGK Spark Plug Stock # 5044 (snowmobile) BR8EIX
    Regular price
    $11.99 USD
    Regular price
    $11.99 USD
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    $11.99 USD
    NGK Spark Plug Stock # 5044 (snowmobile) BR8EIX is a NGK spark plugs designed to support consistent ignition performance, dependable combustion, and proper service replacement on compatible applica...
  • Vendor:
    NGK
    NGK Spark Plug Stock # 4285 BKR7EQUP
    Regular price
    $8.29 USD
    Regular price
    $8.29 USD
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    $8.29 USD
    NGK Spark Plug Stock # 4285 BKR7EQUP 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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    NGK
    NGK Spark Plug Stock # 3521 CR9EIX
    Regular price
    $10.99 USD
    Regular price
    $10.99 USD
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    $10.99 USD
    NGK Spark Plug Stock # 3521 CR9EIX is a NGK spark plugs designed to support consistent ignition performance, dependable combustion, and proper service replacement on compatible applications. This l...
  • Vendor:
    NGK
    NGK Spark Plug Stock #6637 BPR6EIX
    Regular price
    $8.49 USD
    Regular price
    $8.49 USD
    Sale price
    $8.49 USD
    NGK Spark Plug Stock #6637 BPR6EIX is a NGK spark plugs designed to support consistent ignition performance, dependable combustion, and proper service replacement on compatible applications. This l...
  • Vendor:
    NGK
    NGK Spark Plug Spark Plugs 91418
    Regular price
    $14.49 USD
    Regular price
    $14.49 USD
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    $14.49 USD
    NGK Spark Plug Spark Plugs 91418 is a NGK spark plugs designed to support consistent ignition performance, dependable combustion, and proper service replacement on compatible applications. This lis...
  • Vendor:
    NGK
    NGK Spark Plug Stock # 7092 BKR6EGP
    Regular price
    $7.69 USD
    Regular price
    $7.69 USD
    Sale price
    $7.69 USD
    NGK Spark Plug Stock # 7092 BKR6EGP is a NGK spark plugs designed to support consistent ignition performance, dependable combustion, and proper service replacement on compatible applications. This ...
  • Vendor:
    NGK
    NGK Spark Plug Stock 7928 B10ES
    Regular price
    $3.99 USD
    Regular price
    $3.99 USD
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    $3.99 USD
    NGK Spark Plug Stock 7928 B10ES is a NGK spark plugs designed to support consistent ignition performance, dependable combustion, and proper service replacement on compatible applications. This list...
  • Vendor:
    NGK
    NGK Spark Plug Stock # 6289 CR9EIA-9
    Regular price
    $11.99 USD
    Regular price
    $11.99 USD
    Sale price
    $11.99 USD
    NGK Spark Plug Stock # 6289 CR9EIA-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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