BPR6EIX NGK Iridium Spark Plug | Genuine NGK Spark Plug

🔧 Product Description

NGK Iridium Spark Plug – Part Number: BPR6EIX

Iridium NGK spark plugs offer a longer service life than a standard nickel-tipped spark plug: while nickel-alloy plugs offer a service life of roughly 20,000-40,000km, NGK Iridium IX spark plugs offer a service life of up to 60,000km, so fewer replacements are needed over time despite the higher initial cost.

Precious-metal spark plugs like the NGK Iridium IX also offer higher ignitability, achieved with an exposed fine-tip centre electrode that promotes superior flame growth compared with a standard spark plug. Iridium has a much higher melting point (2410°C) than nickel (1453°C), allowing the centre electrode diameter to be reduced from 2.5mm to 0.6mm – a smaller electrode mass that reduces the impedance to flame progress, helping acceleration, fuel consumption and idle quality.

⚙️ Key Features

• Fine iridium-tipped centre electrode for a slow wear rate and stable idle
• Longer service life than standard nickel plugs
• Trivalent metal plating provides superior anti-corrosion and anti-seizing properties
• Corrugated ribs reduce the risk of flashover
• Pure alumina silicate ceramic insulator, providing superior strength and better heat transfer
• Copper core aids in heat removal
• Triple seals prevent leakage

📏 Specifications

• NGK stock number: 6637
• Thread: 14 mm
• Reach: 19 mm (3/4 in)
• Hex: 20.8 mm (13/16 in)
• Seat: Gasket
• Type: Projected

🚘 Application

Listed in NGK's application charts for marine, motorcycle, ATV and snowmobile equipment and automotive vehicles. The gap is not the same on all of them – the chart lists between 0.5 mm and 1.0 mm depending on the engine, so check the line for yours.

• Chrysler LM318A (8 CYL) – Inboard Engine
• Chrysler LM318AC (8 CYL) – Inboard Engine
• Chrysler LM318B (8 CYL) – Inboard Engine
• Chrysler LM318BC (8 CYL) – Inboard Engine
• Chrysler LM318BJ (8 CYL) – Inboard Engine
• Chrysler LM318BT (8 CYL) – Inboard Engine
• Chrysler LM318BV (8 CYL) – Inboard Engine
• Chrysler LM318D (8 CYL) – Inboard Engine
• Chrysler LM340B (8 CYL) – Inboard Engine
• Chrysler LM340BJ (8 CYL) – Inboard Engine
• Chrysler LM340BT (8 CYL) – Inboard Engine
• Chrysler LM340BV (8 CYL) – Inboard Engine
• Chrysler M91D (4 CYL) – Inboard Engine
• Chrysler M91F (4 CYL) – Inboard Engine
• Chrysler M273A (8 CYL) – Inboard Engine
• Chrysler M273B (8 CYL) – Inboard Engine
• Chrysler M273BT (8 CYL) – Inboard Engine
• Chrysler M360A (8 CYL) – Inboard Engine
• Chrysler M360B (8 CYL) – Inboard Engine
• Chrysler M360BC (8 CYL) – Inboard Engine
• Chrysler M360BJ (8 CYL) – Inboard Engine
• Chrysler M360BT (8 CYL) – Inboard Engine
• Chrysler M360BV (8 CYL) – Inboard Engine
• Mercruiser 8.2 HO DTS ECT (8 CYL GM BIG BLOCK) – Inboard Engine
• Mercruiser 8.2 HORIZON DTS ECT (8 CYL GM BIG BLOCK) – Inboard Engine

That is the 25 most common of 377 applications NGK's charts list for this plug – ask us to check yours.

🔄 Supersession & Cross Reference

NGK's cross-reference tables list this plug against these part numbers.

• Bosch: 4216, 4225, 4310, 4477, 4506, 4510, W6DP, W6DP0 and 9 more
• DENSO: 3045, 3065, 3116, 3291, 4709, 5306, 5502, IW20 and 8 more
• Champion: 247, 248, N10PY, N8GY, RN10GY, RN79PYP17, RN79PYP25, RN9GY
• Autolite: XP63, XP63DP2, XP64, XP64DP2, XS63, XS63DP
• Torch: 8012, F6RTI, F6RTP
• Beck Arnley: 1765184

📦 Condition

• Brand new genuine product
• Supplied in original packaging