NGK LKR7DIX-11S Iridium IX Spark Plug (93175 Iridium Ix), 4 Pack
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Best NGK iridium
Amazon rating
Amazon aggregate, one input among many in the Verdict Score
Current price
$33.56
Updated Jun 27, 2026 · 1 min read
The consensus
What reviewers found
Synthesized across the trust-weighted source mix below.
The NGK LKR7DIX-11S Iridium IX set draws a 4.7-star average from more than 2,200 verified-purchase reviewers, making it one of the better-supported iridium picks we read. The consensus framing is that of a straightforward, dependable iridium replacement plug, with reviewers highlighting consistent performance and the durability associated with NGK's iridium tip. Because the only signals available are retailer ratings, this verdict reflects owner satisfaction rather than measured combustion performance.
What reviewers liked
- Strong 4.7-star average across 2,200-plus verified-purchase reviews
- NGK Iridium IX line has an established durability reputation
- Competitively priced for a four-pack of iridium plugs
Where it falls short
- Only retailer-review data was available; no independent expert testing
- Easy to confuse with similar NGK part numbers, raising fitment risk
- Reviewers recommend verifying the gap despite the pre-gapped claim
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The NGK LKR7DIX-11S Iridium IX set draws a 4.7-star average from more than 2,200 verified-purchase reviewers, making it one of the better-supported iridium picks we read. The consensus framing is that of a straightforward, dependable iridium replacement plug, with reviewers highlighting consistent performance and the durability associated with NGK's iridium tip.
Because the only signals available are retailer ratings, this verdict reflects owner satisfaction rather than measured combustion performance. Reviewers note it as pre-gapped but still advise a gap check before installation, a common refrain across iridium plugs. Confirm the part number matches your engine, as the Iridium IX line spans many heat ranges with similar-looking designations.
- Designed specifically for the performance enthusiast, Iridium IX offers extreme ignitability, improved throttle response
- The 0.6 millimeter laser welded fine Iridium tip ensures high durability and a consistently stable spark and the tapered ground electrode minimizes electrical quenching effect
- Longer insulator , the corrugated ribs on insulator prevents flashover, and a triple gasket seal eliminates combustion gas leakage
- Iridium alloy has extremely high melting point, giving it high durability to heat and electrical wear, perfect for today's high performance engines
- Trivalent Metal Plating provides superior anti-corrosion and anti-seizing properties. Resistor Value-5K Ohm. Hex Size-5/8 inch
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