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Prices may varyThis product ranks #8 of 28 in Spark Plug.Three above it ↓
Last reviewed June 27, 2026
TL;DR Denso ITV20TT (4719) is an Iridium TT aftermarket plug for the boosted Ford 3.5L EcoBoost Gen 1 (2011-2016) · F-150 EcoBoost, Explorer Sport, Flex EcoBoost, Taurus SHO, and Lincoln MKS/MKT EcoBoost. Runs a colder heat range matched to the turbocharged EcoBoost · NOT for the naturally aspirated 3.5L or 3.7L Ti-VCT V6 (those require a different, hotter-range plug). Twin Tip design: 0.4mm iridium center, 0.7mm platinum ground (both tip diameters explicitly stated). 100,000-mile design interval. Cross-refs: CYFS12Y3 / BL3E-12405-DA.
The ITV20TT is Denso's Iridium TT (Twin Tip) plug, built with a 0.4mm iridium center and a 0.7mm platinum ground, both fine-wire narrowed vs. a conventional plug to sharpen spark focus. Thread is M14x1.25 with a tapered seat; 100,000-mile design intent per the Denso Iridium TT product class. CYFS12Y2 / CYFS12Y3 cross-references confirm fitment for the boosted Ford 3.5L EcoBoost Gen 1 (2011-2016): F-150 EcoBoost, Explorer Sport, Flex EcoBoost, Taurus SHO, and the Lincoln MKS/MKT EcoBoost. This plug runs a colder heat range designed for the turbocharged EcoBoost · it is NOT for the naturally aspirated 3.5L or 3.7L Ti-VCT V6 (which require a hotter standard-range plug). Owners across confirmed EcoBoost applications report smooth idle and correct fit. Fitment for the 2.7L EcoBoost F-150 (2015-2020) or the Gen 2 3.5L EcoBoost (2017-2020) was not confirmed during this review. Factory gap is not disclosed on the listing; set it to your service manual spec on install.
Right pick for owners of boosted Ford 3.5L EcoBoost Gen 1 applications (2011-2016) · F-150 EcoBoost, Explorer Sport, Flex EcoBoost, Taurus SHO, and the Lincoln MKS/MKT EcoBoost · wanting an aftermarket Iridium TT alternative with a 100,000-mile design interval. The Twin Tip design with both tip diameters disclosed is a genuine differentiator vs. plugs that only claim iridium without stating tip size. Skip if you have the naturally aspirated 3.5L or 3.7L Ti-VCT V6 (this plug's colder heat range is not matched to NA engines · use the correct hotter-range plug for your engine), if your F-150 has the 2.7L EcoBoost (use Motorcraft SP-594), if you want Ford's own OEM-brand plug (Motorcraft SP-534/SP-550), or if your truck has the Gen 2 3.5L EcoBoost (2017+), where cross-reference accuracy was not confirmed for the ITV20TT. Verify and set the gap on install to match your service manual specification.
No chemical exposure pathway: ceramic-and-steel ignition part, no SDS. Twin precious-metal construction (iridium center, platinum ground) carries a small combined PGM footprint, offset by the 100,000-mile design interval. Steel shell recyclable; ceramic insulator landfills. No manufacturer take-back program as of 2026.
Yes, for the Gen 1 3.5L EcoBoost only (2011-2016). The ITV20TT (4719) is cross-referenced for the Ford F-150 3.5L EcoBoost Gen 1 via Ford OEM cross-references CYFS12Y3 and BL3E-12405-DA. It runs a colder heat range matched to the boosted (turbocharged) EcoBoost engine · it is NOT for the naturally aspirated 3.5L or 3.7L Ti-VCT V6, which require a hotter standard-range plug. Always verify your specific year and engine (EcoBoost vs. base V6) via the fitment tool before ordering.
'TT' stands for Twin Tip. The ITV20TT has a 0.4mm iridium fine-wire center electrode and a 0.7mm platinum fine-wire ground electrode. Both tips are narrowed vs. a conventional plug to concentrate the spark, improving ignition reliability and fuel efficiency. Both dimensions are explicitly stated on the Denso listing.
Denso does not explicitly state the factory gap on the Amazon listing for the ITV20TT. For the Ford V6 applications it covers, the OEM gap spec runs roughly 0.030-0.034 in depending on engine. Fine-wire iridium tips should be gapped carefully (use a wire/coin-style gauge, never pry against the center electrode); check and set to your vehicle's service manual spec before installation.
The Motorcraft SP-534 is Ford's Motorcraft-branded OEM plug for the Gen 1 3.5L EcoBoost F-150, rated at 60,000 miles. The Denso ITV20TT is an aftermarket Iridium TT cross-reference for the same application, rated for 100,000 miles per Denso's Iridium TT design specification. Both use iridium center electrodes; the Denso TT design adds a platinum fine-wire ground as well. The Motorcraft carries OEM-brand authority; the Denso TT carries a longer stated service interval.
The '20' in ITV20TT is the Denso heat range · a colder heat range matched to the turbocharged Ford 3.5L EcoBoost Gen 1. It is not a general-application range: it is specifically calibrated for the boosted EcoBoost, which runs higher cylinder pressures than a naturally aspirated engine. The Iridium TT line is designed for a 100,000-mile service interval. As with any fine-wire plug, inspect the center electrode and insulator for shipping damage on arrival before installing, and torque to your vehicle's spec rather than over-tightening.
Marketing copy from Denso, via Amazon. Not editorial.
Per manufacturer cross-reference. Verify on Amazon before purchase.
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