４９１的火花塞规格

Thread Size ＝18mm
Hex = 20.6mm (13/16")
Seat = Tapered
Reach = 11.6mm (0.46")
Gap = 0.039"

Champion RF9YC (标准，东南原配)：
Champions traditional plugs are all constructed with a corrosion resistant zinc plated shell. Resistor plugs have the most durable high voltage semiconductor while marine application use a special wire wound Q-type suppressor (CDI resistor) when noted. Copper core ground or center electrode (when noted). Conforms to all I.S.O and S.A.E standards as specified by all manufacturers.


Champion 4011 (皮卡，ＳＵＶ，轻客专用)：
Truck Plugs are engineered specifically for pickups, SUV\'s and vans. A massive copper core center electrode has over 120% of the spark area of conventional plugs lending toward a longer life in heavy duty performance needs. The copper core ground electrode dissipates heat faster than a conventional plug. A black glazed zirconia enhanced ceramic insulator offers 40% more strength for durability under rough driving conditions.


Champion 2021 (金装版，Ｖ尖顶，细头)：
Premium Gold plugs are necessary when only Champions best will do. A fine wire Gold palladium firing tip on the center electrode drastically reduces wear, and allows for reduced voltage/firing requirements. Both create a stronger more confined spark which contribute to better acceleration and smoother idling. The ground electrode is a copper core inverted V-tip while the interior and top insulator are zirconia strengthened to improve heat conductivity/removal which further aids in performance and long life.

Denso MA16PR-U/MA16R-U (标准)：
Denso\'s standard plugs have always offered a patented U-groove ground electrode producing for a larger, hotter spark. Copper core for better thermal conductivity. Machine rolled threads to reduce cross-threading and seizing . The plug insulator is constructed of purified alumina powder for extreme stress with 5 ribs to prevent flashover.

NGK V-Power WR5
NGK\'s unique V-Power design directs the spark to the edge of the electrode where it develops more rapidly, this increases ignitability even in lean burn conditions. In addition the NGK V-Power plug has all the features of their traditional plugs including corrugated ribs, pure alumina silicate ceramic insulator for greater strength and better heat transfer, copper core and triple interior seal.

NGK GP Platinum WR5GP (白金)
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.


NGK VX Platinum WR5VX (白金，顶级，特细)
NGK VX series are manufactured with performance in mind. The center electrode is platinum fine wire(0.8mm) for both long life and better performance. A fine wire center electrode requires less voltage thus creating a stronger spark from your current ignition system. A tapered cut ground electrode improves ignitability by allowing for larger growth of the flame kernel.


NGK IX Iridium WR5IX (铱金，超细)
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.

Autolite AP45 (白金)
Autolite Single Platinum spark plugs have all the features of our traditional plugs with the addition of a full platinum tip on the center electrode. This platinum point delivers precise firing with virtually no gap erosion up to 50,000 miles. Resistor plugs minimize electronic interference and can aid in reducing electrode erosion. Copper core aids in cooling and improves resistance to fouling. Power tip or extended electrode plugs project the firing tip into the combustion chamber which not only aids in cooling but also cleaning so that fouling is reduced at low RPM.


Autolite APP45 (双白金)
Autolite Double Platinum delivers peak engine performance with virtually no gap erosion. It does this with platinum to platinum firing tips on both the ground and center electrodes. Originally designed for Distributorless ignition systems(DIS), any car can benefit from the long life high performance features as well as the top fuel efficiency over the extended life of this plug. Resistor plugs minimize electronic interference and can aid in reducing electrode erosion. Copper core aids in cooling and improves resistance to fouling. Power tip or extended electrode plugs project the firing tip into the combustion chamber which not only aids in cooling but also cleaning so that fouling is reduced at low RPM.

依金的还是双白金用于菱帅好些

一般来讲，白金或双白金以足够，你又不是去赛车，但有钱的人多，价钱相差不远．

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