Compared across 2 stores. Prices are checked against each store and labelled with when.
It checks today's price at every store, compares the alternatives and answers in about a minute.
The NGK Iridium IX LTR7IX-11 is a resistor-type spark plug with a 0.6mm iridium center electrode, a copper core and a tapered-cut ground electrode. The fine tip lowers the voltage needed to fire, which NGK says gives a stronger spark, quicker throttle response and better anti-fouling than platinum plugs. Heat range 7, 14mm thread, 25mm reach and a projected insulator suit many modern high-performance engines. Enthusiasts rate Iridium IX plugs for smooth idle and long service life, though some find standard iridium plugs a better value for stock engines.
In stockReturn policy
In stock
Also available at
Store links may earn us a commission.
Lowest price we've seen: $155.50 on Nov 12 at Amazon. Tracked across 1 store since Nov 12.
Owners of turbo and modified engines report smoother idle, cleaner starts and less fouling than with older plugs. Many praise the long service life. Some say the gain over standard plugs is small on stock engines.
The NGK Iridium IX LTR7IX-11 is an iridium spark plug made for performance engines. This set includes 16 plugs. The center electrode has an iridium tip. Iridium is stronger and harder than platinum and has a very high melting point.
The center electrode is an ultra-fine 0.6mm wire, which lowers the voltage needed to produce a spark. This gives a stronger spark from the existing ignition system. The ground electrode has a tapered cut at the firing end, which reduces quenching and helps the flame core grow.
The fine-wire center electrode and tapered ground electrode are designed to improve ignitability, throttle response, acceleration and fuel efficiency. The plug has anti-fouling properties. Its trivalent metal plating resists corrosion and seizing.
