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MSD Iridium Spark Plug 3737

MSD Iridium Spark Plug 3737
$6.99 ea
NEWARRIVING SOONEstimated Ship Date 05/16/2024 (If Ordered Today)32 Available from HOLLEY PERFORMANCE PRODUCTS as of 04/25/2024
Model: 4017212
Select a Vehicle or refer to the Vehicle Fitment Tab below to verify that this part fits your vehicle.
STANDARD
DELIVERY
MSD's spark plugs are engineered to improve the efficiency of the combustion process to create the most power possible combined with increased durability. The center tip of the plug is made from iridium to promote the best spark and increase resilience. A proprietary ceramic material enhances the dielectric strength of the plug housing forcing the spark, even under extreme cylinder pressures, to jump across the plug gap to the ground electrode. This electrode is machined to expose more spark to the incoming gases to promote the most effective combustion event possible.
Features:
  • Proprietary plug design inside and out
  • Designed for use on high performance vehicles that utilize high output ignition systems
  • Machined electrode increases exposure to the flame to improve combustion
  • MSD’s proprietary ceramic formula provides the highest dielectric strength
  • Yttrium ground electrode reduces the chance of pre-ignition
  • Iridium tip improves cold starts
  • All spark plugs tested prior to packaging and shipping
  • Unique insulator design improves spark isolation
  • Lower voltage Requirements for longer coil life
About MSD Ignition

Racers never stop experimenting as they search for every way to wring out more power or handling performance to to gain an edge over the competition. The team at MSD is no different as we strive to deliver the products you  need to meet your performance goals. We continue to innovate and invent components and technology that deliver  performance and reliability with products that are easy to use and install. 

Over the course of 40-plus years, MSD Performance has been driving the development of innovative components  that helped shape the way our cars race and perform. From super speedways to road courses, land speed racing to  top fuel dragsters, and of course your traditional hot rod, MSD has provided the components to fire nearly anything in  motorsports.

MSD was the first company to develop and offer the multiple sparking, capacitive discharge ignition for engines. The line of MSD 6-Series Ignitions are the most popular aftermarket ignitions in the world due to our race-proven performance on the track and our reliability on the street!

Early on, MSD focused squarely on ignition systems with revolutionary products like the multiple sparking CD ignition, timing and rev controls, billet aluminum distributors and the Pro-Mag, an incredible breakthrough in power  and endurance. 

Today MSD is developing electronics for your entire powertrain. The Atomic EFI systems for the LS engine platform and throttle body are now complemented with a transmission controller. Our DynaForce Starters and Alternators  ensure that your engine cranks over to fire up and the Alternators keep it charged. MSD is poised to deliver components that work and communicate together to provide performance and value.

Videos:

Vehicle Fitment:

The Vehicle Fitment Guide is to be used as a general reference. The data has been provided by our suppliers and manufacturers and may contain errors or incorrect data. Always refer to a professional to verify correct fitment for your vehicle.
Make Model Submodel Years Engine Fitment Notes
American Motors American 1958 3.2L / 196 / L6 Iridium Tip Spark Plug; Single; Plug Type 15IR4; [Available While Supplies Last];0.035 in. Plug Gap;
American Motors American 1959 3.2L / 196 / L6 Iridium Tip Spark Plug; Single; Plug Type 15IR4; [Available While Supplies Last];0.035 in. Plug Gap;
American Motors American 1960 3.2L / 196 / L6 Iridium Tip Spark Plug; Single; Plug Type 15IR4; [Available While Supplies Last];0.035 in. Plug Gap;
American Motors American 1961 3.2L / 196 / L6 Iridium Tip Spark Plug; Single; Plug Type 15IR4; [Available While Supplies Last];0.035 in. Plug Gap;
American Motors American 1962 3.2L / 196 / L6 Iridium Tip Spark Plug; Single; Plug Type 15IR4; [Available While Supplies Last];0.035 in. Plug Gap;
American Motors American 1964 3.2L / 196 / L6 Iridium Tip Spark Plug; Single; Plug Type 15IR4; [Available While Supplies Last];0.035 in. Plug Gap;
American Motors American 1965 3.2L / 196 / L6 Iridium Tip Spark Plug; Single; Plug Type 15IR4; [Available While Supplies Last];0.035 in. Plug Gap;
American Motors Classic 1961 3.2L / 196 / L6 Iridium Tip Spark Plug; Single; Plug Type 15IR4; [Available While Supplies Last];0.035 in. Plug Gap;
American Motors Classic 1962 3.2L / 196 / L6 Iridium Tip Spark Plug; Single; Plug Type 15IR4; [Available While Supplies Last];0.035 in. Plug Gap;
American Motors Classic 1963 3.2L / 196 / L6 Iridium Tip Spark Plug; Single; Plug Type 15IR4; [Available While Supplies Last];0.035 in. Plug Gap;
American Motors Classic 1964 4.7L / 287 / V8
3.2L / 196 / L6		 Iridium Tip Spark Plug; Single; Plug Type 15IR4; [Available While Supplies Last];0.035 in. Plug Gap;
American Motors Classic 1965 4.7L / 287 / V8 Iridium Tip Spark Plug; Single; Plug Type 15IR4; [Available While Supplies Last];0.035 in. Plug Gap;
American Motors Custom 1961 3.2L / 196 / L6 Iridium Tip Spark Plug; Single; Plug Type 15IR4; [Available While Supplies Last];0.035 in. Plug Gap;
American Motors Custom 1962 3.2L / 196 / L6 Iridium Tip Spark Plug; Single; Plug Type 15IR4; [Available While Supplies Last];0.035 in. Plug Gap;
American Motors Deluxe 1961 3.2L / 196 / L6 Iridium Tip Spark Plug; Single; Plug Type 15IR4; [Available While Supplies Last];0.035 in. Plug Gap;
American Motors Deluxe 1962 3.2L / 196 / L6 Iridium Tip Spark Plug; Single; Plug Type 15IR4; [Available While Supplies Last];0.035 in. Plug Gap;
American Motors Marlin 1965 4.7L / 287 / V8 Iridium Tip Spark Plug; Single; Plug Type 15IR4; [Available While Supplies Last];0.035 in. Plug Gap;
American Motors Marlin 1966 4.7L / 287 / V8 Iridium Tip Spark Plug; Single; Plug Type 15IR4; [Available While Supplies Last];0.035 in. Plug Gap;
American Motors Rambler 1959 3.2L / 196 / L6 Iridium Tip Spark Plug; Single; Plug Type 15IR4; [Available While Supplies Last];0.035 in. Plug Gap;
American Motors Rambler 1960 3.2L / 196 / L6 Iridium Tip Spark Plug; Single; Plug Type 15IR4; [Available While Supplies Last];0.035 in. Plug Gap;
American Motors Rebel 1959 4.1L / 250 / V8 Iridium Tip Spark Plug; Single; Plug Type 15IR4; [Available While Supplies Last];0.035 in. Plug Gap;
American Motors Super Six 1961 3.2L / 196 / L6 Iridium Tip Spark Plug; Single; Plug Type 15IR4; [Available While Supplies Last];0.035 in. Plug Gap;
American Motors Super Six 1962 3.2L / 196 / L6 Iridium Tip Spark Plug; Single; Plug Type 15IR4; [Available While Supplies Last];0.035 in. Plug Gap;
Audi A4 Avant 2004 3.0L / V6
1.8L / L4		 Iridium Tip Spark Plug; Single; Plug Type 15IR4; [Available While Supplies Last];0.035 in. Plug Gap;
Audi A4 Avant 2005 1.8L / L4 Iridium Tip Spark Plug; Single; Plug Type 15IR4; [Available While Supplies Last];0.035 in. Plug Gap;
Audi A4 Base 1997 1.8L / L4 Iridium Tip Spark Plug; Single; Plug Type 15IR4; [Available While Supplies Last];0.035 in. Plug Gap;
Audi A4 Base 1998 1.8L / L4 Iridium Tip Spark Plug; Single; Plug Type 15IR4; [Available While Supplies Last];0.035 in. Plug Gap;
Audi A4 Base 1999 1.8L / L4 Iridium Tip Spark Plug; Single; Plug Type 15IR4; [Available While Supplies Last];0.035 in. Plug Gap;
Audi A4 Base 2000 1.8L / L4 Iridium Tip Spark Plug; Single; Plug Type 15IR4; [Available While Supplies Last];0.035 in. Plug Gap;
Audi A4 Base 2001 1.8L / L4 Iridium Tip Spark Plug; Single; Plug Type 15IR4; [Available While Supplies Last];0.035 in. Plug Gap;
Audi A4 Base 2002 1.8L / L4
3.0L / V6		 Iridium Tip Spark Plug; Single; Plug Type 15IR4; [Available While Supplies Last];0.035 in. Plug Gap;
Audi A4 Base 2003 1.8L / L4
3.0L / V6		 Iridium Tip Spark Plug; Single; Plug Type 15IR4; [Available While Supplies Last];0.035 in. Plug Gap;
Audi A4 Base 2004 1.8L / L4
3.0L / V6		 Iridium Tip Spark Plug; Single; Plug Type 15IR4; [Available While Supplies Last];0.035 in. Plug Gap;
Audi A4 Base 2005 1.8L / L4
3.0L / V6		 Iridium Tip Spark Plug; Single; Plug Type 15IR4; [Available While Supplies Last];0.035 in. Plug Gap;
Audi A4 Cabriolet 2003 1.8L / L4
3.0L / V6		 Iridium Tip Spark Plug; Single; Plug Type 15IR4; [Available While Supplies Last];0.035 in. Plug Gap;
Audi A4 Cabriolet 2004 1.8L / L4
3.0L / V6		 Iridium Tip Spark Plug; Single; Plug Type 15IR4; [Available While Supplies Last];0.035 in. Plug Gap;
Audi A4 Cabriolet 2005 1.8L / L4
3.0L / V6		 Iridium Tip Spark Plug; Single; Plug Type 15IR4; [Available While Supplies Last];0.035 in. Plug Gap;
Audi A4 Cabriolet 2006 1.8L / L4 Iridium Tip Spark Plug; Single; Plug Type 15IR4; [Available While Supplies Last];0.035 in. Plug Gap;
Audi A4 1996 2.8L / V6 Iridium Tip Spark Plug; Single; Plug Type 15IR4; [Available While Supplies Last];0.035 in. Plug Gap;
Audi A4 1997 2.8L / V6 Iridium Tip Spark Plug; Single; Plug Type 15IR4; [Available While Supplies Last];0.035 in. Plug Gap;
Audi A4 1998 2.8L / V6
Audi A4 1999 2.8L / V6 Iridium Tip Spark Plug; Single; Plug Type 15IR4; [Available While Supplies Last];0.035 in. Plug Gap;
Audi A4 2000 2.8L / V6 Iridium Tip Spark Plug; Single; Plug Type 15IR4; [Available While Supplies Last];0.035 in. Plug Gap;
Audi A4 2001 2.8L / V6 Iridium Tip Spark Plug; Single; Plug Type 15IR4; [Available While Supplies Last];0.035 in. Plug Gap;
Mercury Custom 1954 4.2L / 256 / V8 Iridium Tip Spark Plug; Single; Plug Type 15IR4; [Available While Supplies Last];0.035 in. Plug Gap;
Mercury Mercury 1946 3.9L / 239 / V8 Iridium Tip Spark Plug; Single; Plug Type 15IR4; [Available While Supplies Last];0.035 in. Plug Gap;
Mercury Mercury 1947 3.9L / 239 / V8 Iridium Tip Spark Plug; Single; Plug Type 15IR4; [Available While Supplies Last];0.035 in. Plug Gap;
Mercury Mercury 1948 3.9L / 239 / V8 Iridium Tip Spark Plug; Single; Plug Type 15IR4; [Available While Supplies Last];0.035 in. Plug Gap;
Mercury Mercury 1949 3.7L / 225 / V8 Iridium Tip Spark Plug; Single; Plug Type 15IR4; [Available While Supplies Last];0.035 in. Plug Gap;
Mercury Monterey 1954 4.2L / 256 / V8 Iridium Tip Spark Plug; Single; Plug Type 15IR4; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac Bonneville 1957 5.7L / 347 / V8 Iridium Tip Spark Plug; Single; Plug Type 15IR4; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac Catalina 1950 3.9L / 239 / L6
4.4L / 268 / L8		 Iridium Tip Spark Plug; Single; Plug Type 15IR4; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac Catalina 1951 4.4L / 268 / L8
3.9L / 239 / L6		 Iridium Tip Spark Plug; Single; Plug Type 15IR4; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac Catalina 1952 4.4L / 268 / L8
3.9L / 239 / L6		 Iridium Tip Spark Plug; Single; Plug Type 15IR4; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac Catalina 1953 4.4L / 268 / L8
3.9L / 239 / L6		 Iridium Tip Spark Plug; Single; Plug Type 15IR4; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac Catalina 1954 4.4L / 268 / L8
3.9L / 239 / L6		 Iridium Tip Spark Plug; Single; Plug Type 15IR4; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac Catalina 1955 4.7L / 287 / V8 Iridium Tip Spark Plug; Single; Plug Type 15IR4; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac Catalina 1956 5.2L / 316 / V8 Iridium Tip Spark Plug; Single; Plug Type 15IR4; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac Catalina 1957 5.7L / 347 / V8 Iridium Tip Spark Plug; Single; Plug Type 15IR4; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac Catalina 1958 6.1L / 370 / V8 Iridium Tip Spark Plug; Single; Plug Type 15IR4; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac Chieftain 1949 4.1L / 249 / L8
3.9L / 239 / L6		 Iridium Tip Spark Plug; Single; Plug Type 15IR4; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac Chieftain 1950 4.4L / 268 / L8
3.9L / 239 / L6		 Iridium Tip Spark Plug; Single; Plug Type 15IR4; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac Chieftain 1951 4.4L / 268 / L8
3.9L / 239 / L6		 Iridium Tip Spark Plug; Single; Plug Type 15IR4; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac Chieftain 1952 4.4L / 268 / L8
3.9L / 239 / L6		 Iridium Tip Spark Plug; Single; Plug Type 15IR4; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac Chieftain 1953 4.4L / 268 / L8
3.9L / 239 / L6		 Iridium Tip Spark Plug; Single; Plug Type 15IR4; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac Chieftain 1954 4.4L / 268 / L8
3.9L / 239 / L6		 Iridium Tip Spark Plug; Single; Plug Type 15IR4; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac Chieftain 1955 4.7L / 287 / V8 Iridium Tip Spark Plug; Single; Plug Type 15IR4; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac Chieftain 1956 5.2L / 316 / V8 Iridium Tip Spark Plug; Single; Plug Type 15IR4; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac Chieftain 1957 5.7L / 347 / V8 Iridium Tip Spark Plug; Single; Plug Type 15IR4; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac Chieftain 1958 6.1L / 370 / V8 Iridium Tip Spark Plug; Single; Plug Type 15IR4; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac Star Chief 1954 4.4L / 268 / L8 Iridium Tip Spark Plug; Single; Plug Type 15IR4; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac Star Chief 1955 4.7L / 287 / V8 Iridium Tip Spark Plug; Single; Plug Type 15IR4; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac Star Chief 1956 5.2L / 316 / V8 Iridium Tip Spark Plug; Single; Plug Type 15IR4; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac Star Chief 1957 5.7L / 347 / V8 Iridium Tip Spark Plug; Single; Plug Type 15IR4; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac Star Chief 1958 6.1L / 370 / V8
4.3L / 261 / L6		 Iridium Tip Spark Plug; Single; Plug Type 15IR4; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac Strato-Chief 1958 5.7L / 348 / V8 Iridium Tip Spark Plug; Single; Plug Type 15IR4; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac Streamliner 1946 3.9L / 239 / L6
4.1L / 249 / L8		 Iridium Tip Spark Plug; Single; Plug Type 15IR4; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac Streamliner 1947 3.9L / 239 / L6
4.1L / 249 / L8		 Iridium Tip Spark Plug; Single; Plug Type 15IR4; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac Streamliner 1948 3.9L / 239 / L6
4.1L / 249 / L8		 Iridium Tip Spark Plug; Single; Plug Type 15IR4; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac Streamliner 1949 3.9L / 239 / L6
4.1L / 249 / L8		 Iridium Tip Spark Plug; Single; Plug Type 15IR4; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac Streamliner 1950 3.9L / 239 / L6
4.4L / 268 / L8		 Iridium Tip Spark Plug; Single; Plug Type 15IR4; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac Streamliner 1951 3.9L / 239 / L6
4.4L / 268 / L8		 Iridium Tip Spark Plug; Single; Plug Type 15IR4; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac Streamliner 1952 3.9L / 239 / L6
4.4L / 268 / L8		 Iridium Tip Spark Plug; Single; Plug Type 15IR4; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac Super Chief 1957 5.7L / 347 / V8 Iridium Tip Spark Plug; Single; Plug Type 15IR4; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac Super Chief 1958 6.1L / 370 / V8 Iridium Tip Spark Plug; Single; Plug Type 15IR4; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac Torpedo 1946 3.9L / 239 / L6
4.1L / 249 / L8		 Iridium Tip Spark Plug; Single; Plug Type 15IR4; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac Torpedo 1947 3.9L / 239 / L6
4.1L / 249 / L8		 Iridium Tip Spark Plug; Single; Plug Type 15IR4; [Available While Supplies Last];0.035 in. Plug Gap;
Pontiac Torpedo 1948 3.9L / 239 / L6
4.1L / 249 / L8		 Iridium Tip Spark Plug; Single; Plug Type 15IR4; [Available While Supplies Last];0.035 in. Plug Gap;

Specifications:

Emission Code 2
Heat Range 4
Hex Size 13/16
Length Standard
Part Type Spark Plug
Plug Style Code 15IR4
Product Type Spark Plug
Projected Tip No
Proposition 65 www.P65Warnings.ca.gov
Quantity 1
Reach 0.3750
Resistor Yes
Seat Type Gasket
Style Iridium
Thread Size 14mm
Warranty Limited 1 Year Warranty

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