75% under what the other stores charge
Compared across 13 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 LFR7AIX (stock number 2309) is a set of four iridium-tipped spark plugs, one heat range colder than stock. The fine iridium center electrode and tapered ground electrode are built for sharper ignition and better fouling resistance than standard copper-core plugs. It is aimed at modified or higher-boost Subaru turbo engines, where a colder plug helps control detonation. Against rival iridium plugs it is a proven, widely used upgrade, but the colder heat range makes it a poor fit for a stock, lightly driven car.
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Lowest price we've seen: $10.15 on Nov 13 at Zoro. Tracked across 12 stores since Nov 13.
Owners of turbo Subarus commonly fit these as a step up when raising boost, and report smooth running and good resistance to fouling. The main caution is that the colder range is a mismatch for stock or gently driven cars.
This is a set of four NGK Iridium IX spark plugs, part number 2309 (LFR7AIX). The plugs are a heat range colder than the standard plug. They use iridium as the primary material and work electrically.
The plugs are listed for several Subaru models, including the WRX, STi, Forester XT, Outback XT and Legacy GT. See the fitment list below for model years.
