A set of 4 NGK RUTHENIUM HX™ High Ignitability Spark Plugs.

NGK RUTHENIUM HX High Ignitability spark plugs provide a more complete fuel burn resulting in a quicker throttle response, smoother idle and better cold starts. Ruthenium center electrode provides industry leading durability.

Fits the following unmodified models:

2002 - 2006 R50 MINI Cooper and R53 Cooper S Hardtop
2005 - 2008 R52 MINI Cooper and Cooper S Convertible

For the stock normally aspirate Cooper and supercharged Cooper S with stock supercharger pulley.

NGK Ruthenium HX High Ignitability spark plugs are the best in class plug for today's modern vehicles. HGK's patented Ruthenium technology offers the most advance tip technology and delivers the highest performance and life expectancy.

Created from advanced OE technology as a high ignitability lug. RUTHENUIM HX spark plugs come with patented, specialized OEM PSPE® tip designs to meet the demands of modern engines. PSPE® (projected square platinum electrode) provides the best ignitability and service life for high-heat engines. This NGK-patented design is recommended for turbo and supercharged engines.

Product Attributes

• Center Electrode Core Material: Copper
• Center Electrode Tip Material: Ruthenium
• Electrical Terminal Type: Non-Removable Nut
• Ground Configuration: Standard
• Ground Electrode Core Material: Copper
• Ground Electrode Quantity: 1
• Ground Electrode Tip Design: Projected Square Platinum Electrode - High Ignitability
• Hex Size: 5/8 in
• Insulator Height: 50.50mm
• Manufacturer Heat Range: 6
• Pre-Gap Size: .032 in
• Reach: .75 in
• Resistance: 5000 Ohms
• Seat Type: Flat
• Thread Diameter: 14.00 mm

Use proper torque (27 Nm or 20 ft-lb) when installing spark plugs. We recommend changing plugs on a 'cool/cold' engine.

A Set of 4 NGK Iridium IX Spark plug for the MINI Cooper S equipped with the supercharger pulley upgrade.

Fits the following models with the supercharger pulley upgrade:

2002 - 2006 R53 MINI Cooper S Hardtop 
2005 - 2008 R52 MINI Cooper S Convertible

Also an appropriate alternative for the JCW models.

This Iridium IX spark plug is rated a step 'cooler' than stock to reduce the likelihood of detonation, features a .6mm iridium center electrode which offers superior ignitability without sacrificing durability. The tapered ground electrode of the spark plug increases flame kernel expansion, while the superior heat range design is ideally suited to the demands of high performance MINI Cooper S environments. Spark plugs come pre-gapped, but should be checked for .032" gap before installation. 

Advantages of Iridium spark plug types
Because of the properties of Iridium, the spark plugs centre electrode can be made with a much smaller diameter than with platinum types (0.6mm), Gold or gold palladium and copper/nickel types. This means that spark plugs potential difference is more concentrated and hence less 'spark jump' voltage is required - this can be as much as 5,000 volts less than with standard plug types. Ignition is improved and less strain is placed on the ignition system. Benefits of improved ignition/combustion include better fuel economy, increased power/acceleration and especially better throttle response.

Iridium: 8 times stronger than platinum, 6 times harder, and with a melting point 1200 degrees higher. New laser welding techniques make it possible to make a spark plug with an iridium electrode. The result is a plug that requires less voltage to spark, burns more of the fuel in the cylinder, and can spark at LEANER air/fuel mixtures, resulting in higher horsepower and better gas mileage. Although the plugs are expensive, you don't have to change them as often as garden variety spark plugs. The iridium electrode is extremely resistant to erosion, so it can last MUCH longer than a normal plug. (Longevity will vary by usage, fuel mixture, and other factors.)

Subject to manufactures warranty.

NOTE: MINI specifies spark plugs should be torqued 'unlubricated' to 27 Nm.

Fits the following models with the supercharger pulley upgrade:
2002 - 2006 R53 MINI Cooper S Hardtop 
2005 - 2008 R52 MINI Cooper S Convertible

For a list of all spark plug options, see NME3010-P.

Multi-ground Spark Plugs for the COOPER S with the Supercharger Pulley Upgrade.
Replacement performance spark plugs for the MINI Cooper S with the pulley upgrade, sold in a package of 4. 'Cooler' temperature rating than stock. 14mm, 3/4" reach, 2 ground electrodes. Pre-gapped.

Subject to manufacturers warranty.

NOTE: MINI specifies spark plugs should be torqued 'unlubricated' to 27 Nm.

Fits the following JCW models:
2002 - 2006 R53 JCW Cooper S Hardtop 
2005 - 2008 R52 JCW Cooper S Convertible

For a list of all spark plug options, see NME3010-P.

COOPER S JCW - MULTI-GROUND PLATINUM:
A great replacement for the stock plugs in your MINI Cooper S with the JCW Engine Upgrade Package. These plugs are slightly 'cooler' than stock to accommodate the higher boost with the JCW.

Multi-ground electrodes improve ignition capabilities and are less sensitive to increased voltage requirements due to gap growth. Designed to specific manufacturer ignition requirements in either supplementary gap, intermittent discharge, or semi-surface discharge, all for various firing tip self cleaning abilities. Platinum center electrode for extended life. Multi-ground plugs maintain all features of NGK's traditional plugs including corrugated ribs, pure alumina silicate ceramic insulator for greater strength and better heat transfer, copper core and triple interior seal. Pre-gapped to 0.032".

Some combustion chamber designs require that the spark plugs have the ground electrode placed to the side of the center electrode rather than below as on a traditional plug. This firing tip design tends to erode the tip of the ground electrode faster than a traditional plug, erosion at these points creates a larger gap between the center and ground electrodes causing plug misfire. Thus by having more ground electrodes you extend plug life. It is important to note that multi-ground does not mean multi-spark, there will still only be one spark at a time.

Subject to manufacturers warranty.

NOTE: MINI specifies spark plugs should be torqued 'unlubricated' to 27 Nm.

A set of four (4) NGK Multi-Ground Platinum Spark Plugs with four ground electrodes - a great replacement for your stock MINI Cooper.

Subject to manufacturer's warranty.

Fits the following models:

• 2002 - 2006 R50 MINI Cooper and R53 Cooper S Hardtop
• 2005 - 2008 R52 MINI Cooper and Cooper S Convertible

Multi-ground electrodes improve ignition capabilities and are less sensitive to increased voltage requirements due to gap growth. Designed to specific manufacturer ignition requirements in either supplementary gap, intermittent discharge, or semi-surface discharge, all for various firing tip self cleaning abilities. Platinum center electrode for extended life. Multi-ground plugs maintain all features of NGK's traditional plugs including corrugated ribs, pure alumina silicate ceramic insulator for greater strength and better heat transfer, copper core and triple interior seal.

Some combustion chamber designs (such as a rotary motor) require that the spark plugs have the ground electrode placed to the side of the center electrode rather than below as on a traditional plug (see photo). This firing tip design tends to erode the tip of the ground electrode faster than a traditional plug, erosion at these points creates a larger gap between the center and ground electrodes causing plug misfire. Thus by having more ground electrodes you extend plug life. It is important to note that multi-ground does not mean multi-spark, there will still only be one spark at a time.

Pre-gapped at 0.032"

14mm, 3/4" reach, 5/8" hex, gasket seat, resistor, ISO length, projected tip, extra long life platinum, fine point platinum on center electrode, 4 ground electrodes.

NOTE: MINI specifies spark plugs should be torqued 'unlubricated' to 27 Nm.

Upgrade your Spark Plugs with this set of four (4) NGK Laser Iridium Spark Plugs. Better performance and durability compared to stock.

Subject to manufacturer's warranty.

Fits the following unmodified models:

• 2002 - 2006 R50 MINI Cooper and R53 Cooper S Hardtop
• 2005 - 2008 R52 MINI Cooper and Cooper S Convertible

For a list of all spark plug options, see NME3010-P.

NGK iridium plugs represent the ultimate evolution of spark plug technology and performance. The iridium center electrode is both stronger and harder than platinum. This allows NGK engineers to design an ultra-fine (0.6mm)center electrode reducing the voltage requirement for spark. This allows for a brighter, stronger spark from your existing ignition system. The ground electrode has a tapered cut at the firing end which reduces quenching for better flame core growth and increased ignitability. The combination of fine wire center electrode and tapered cut ground will increase performance, improve acceleration, and fuel efficiency.

Advantages of Iridium spark plug types:
Because of the properties of Iridium, the spark plugs center electrode can be made with a much smaller diameter than with platinum types (0.6mm), Gold or gold palladium and copper/nickel types. This means that spark plugs potential difference is more concentrated and hence less 'spark jump' voltage is required - this can be as much as 5,000 volts less than with standard plug types. Ignition is improved and less strain is placed on the ignition system. Benefits of improved ignition/combustion include better fuel economy, increased power/acceleration and especially better throttle response.

Iridium: 8 times stronger than platinum, 6 times harder, and with a melting point 1200 degrees higher. New laser welding techniques make it possible to make a spark plug with an iridium electrode. The result is a plug that requires less voltage to spark, burns more of the fuel in the cylinder, and can spark at LEANER air/fuel mixtures, resulting in higher horsepower and better gas mileage. Although the plugs are expensive, you don't have to change them as often as garden variety spark plugs. The iridium electrode is extremely resistant to erosion, so it can last MUCH longer than a normal plug. (Longevity will vary by usage, fuel mixture, and other factors.)

Iridium IX plug, 14mm, 3/4" reach, 5/8" hex, gasket seat, resistor, ISO length, projected extended tip, fine wire (0.6mm) iridium center electrode, tapered cut ground electrode, .032"gap

Use of anti-seize compound with proper torque is highly recommended when installing spark plugs.

A set of four (4) NGK Laser Platinum Spark Plug upgrade. Better performance and durability compared to stock.

Subject to manufacturer's warranty.

Fits the following unmodified models:

• 2002 - 2006 R50 MINI Cooper and R53 Cooper S Hardtop
• 2005 - 2008 R52 MINI Cooper and Cooper S Convertible

For a list of all spark plug options, see NME3010-P.

For the stock Cooper and Cooper S with stock supercharger pulley.

Laser Platinum® spark plugs provide high ignitability and longer service life. Dual platinum surfaces ensure slow wear rate providing stable idle, superior anti fouling, improved fuel efficiency and lower emissions.

• Laser-welded Platinum center electrode tip
• Platinum disc welded to backside of ground electrode provides long life
• Trivalent Metal Plating provides superior anti-corrosion and anti-seizing properties
• Faster starts and quicker acceleration
• Better fuel economy and lower emissions
• Best Platinum spark plug available
• Original Equipment Manufacturer-approved design

PLATINUM'S USE IN SPARK PLUG CONSTRUCTION Nearly all spark plug manufacturers use platinum in one form or another on their long life or performance spark plugs. This is because of platinum’s high melting point, which makes it useful in two ways. On long life spark plugs a thin wafer of platinum is bonded at the firing point to the center electrode (and possibly ground electrode) solely so they don’t wear as fast as a traditional plug. On a fine wire performance plug, the very tip of the center electrode is made of platinum so that the fine wire tip will last longer. Do not be fooled, all platinum plugs are not created equal. Platinum is a very expensive precious metal, a $2 platinum spark plug will not have much platinum in it, and therefore will not last as long as a $12 platinum spark plug. Some platinum plugs have only the center electrode tipped with platinum, while others have both the center and ground electrodes platinum tipped.

GP Single Platinum Spark Plug, 14mm Thread, 19mm (3/4") Reach, 5/8" (16mm) Hex Size, Gasket Seat, Resistor, Solid Terminal, JIS Height, Projected Tip, Platinum Tipped Center Electrode, Trapezoid (Beveled Cut) Ground Electrode, .040" (1.016mm) Gap, Heat Range 6

NGK G-Power offers the performance and durability of platinum at a competitive price. The center electrode is fine wire platinum for better starts, superior acceleration and better fuel economy. Trapezoid cut ground electrode to reduce quenching.

Use of anti-seize compound with proper torque is highly recommended when installing spark plugs.