Recommended spark plugs for replacement
Expert-recommended spark plugs covering iridium, platinum, copper, and performance-focused designs.
NGK Iridium IX 6619
NGK Iridium IX 6619
NGK Iridium IX 6619
NGK Iridium IX 6619
Sources4 Sources
NGK Iridium IX 6619
NGK Iridium IX 6619
NGK Iridium IX 6619
NGK Iridium IX 6619
NGK Iridium IX 6619
NGK Iridium IX 6619
NGK Iridium IX 6619
NGK Iridium IX 6619
NGK Iridium IX 6619
ACDelco Professional Iridium 41-103
ACDelco Professional Iridium 41-103
ACDelco Professional Iridium 41-103
Best overall
NGK IRIDIUM IX 6619 | Spark Plug
NGK IRIDIUM IX 6619 | Spark Plug
AutohausAZ
$
8
.
09
$
19
.
50
Best overall
NGK IRIDIUM IX 6619 | Spark Plug
NGK IRIDIUM IX 6619 | Spark Plug
AutohausAZ
$
8
.
09
$
19
.
50
NGK Iridium IX 6619 spark plug offers a fine-wire iridium electrode, stable ignition, long service life, and broad vehicle compatibility.
Best for GM vehicles
AC Delco 41-103 Iridium Spark Plug
AC Delco 41-103 Iridium Spark Plug
VividRacing
$
10
.
45
Best for GM vehicles
AC Delco 41-103 Iridium Spark Plug
AC Delco 41-103 Iridium Spark Plug
VividRacing
$
10
.
45
ACDelco Professional Iridium 41-103 spark plug provides fine-wire iridium ignition and OEM-level fitment for compatible GM and Chevrolet engines.
Best double iridium
Bosch 9603 OE Fine Wire Double Iridium Spark Plug
Bosch 9603 OE Fine Wire Double Iridium Spark Plug
VividRacing
$
8
.
28
Best double iridium
Bosch 9603 OE Fine Wire Double Iridium Spark Plug
Bosch 9603 OE Fine Wire Double Iridium Spark Plug
VividRacing
$
8
.
28
Bosch Double Iridium 9603 spark plug places iridium on both electrodes for strong longevity and consistent performance in compatible engines.
Best quick-firing iridium
Denso Spark Plug Iridium Long Life Series, 1-Year Limited Warranty 3297
Denso Spark Plug Iridium Long Life Series, 1-Year Limited Warranty 3297
CarParts
$
17
.
99
Best quick-firing iridium
Denso Spark Plug Iridium Long Life Series, 1-Year Limited Warranty 3297
Denso Spark Plug Iridium Long Life Series, 1-Year Limited Warranty 3297
CarParts
$
17
.
99
Denso Iridium Power 3297 spark plug uses a 0.4mm fine iridium center electrode for efficient combustion and responsive ignition in compatible imports.
Best for waste-spark systems
Bosch Spark Plug OE Fine Wire Double Platinum Series, 1-Year Limited Warranty 8105
Bosch Spark Plug OE Fine Wire Double Platinum Series, 1-Year Limited Warranty 8105
CarParts
$
15
.
23
Best for waste-spark systems
Bosch Spark Plug OE Fine Wire Double Platinum Series, 1-Year Limited Warranty 8105
Bosch Spark Plug OE Fine Wire Double Platinum Series, 1-Year Limited Warranty 8105
CarParts
$
15
.
23
Bosch Double Platinum 8105 spark plug uses platinum on both electrodes to support waste-spark ignition and maintain performance over time.
Automotive Spark PlugsCovers spark plugs designed for a wide range of car makes and models, focusing on performance, longevity, and compatibility.
Small Engine Spark PlugsIncludes spark plugs suitable for lawn mowers, snow blowers, and other small engine equipment.
Motorcycle Spark PlugsFocuses on spark plugs optimized for motorcycles, offering better ignition and performance.
Marine Engine Spark PlugsSpecialized spark plugs designed to withstand marine environments and prevent corrosion.
High Performance Spark PlugsSpark plugs engineered for racing or high-output engines, offering improved combustion and durability.
Cold Weather Spark PlugsSpark plugs designed to improve ignition reliability in low temperatures.