BDFHYK Iridium Spark Plugs for Ford F-150 5.4L V8 — 8-Pack, OE-Equivalent Durability and Improved Ignition

BDFHYK SP546 iridium spark plugs are a direct-replacement 8-pack designed to restore reliable ignition and combustion in Ford F-150 5.4L V8 engines from 2004–2008. These high-performance iridium plugs combine a fine iridium center electrode with dense ceramic insulators to deliver consistent sparks, improved combustion efficiency, and long service life. Manufactured to OE-equivalent standards by a TS16949 certified supplier, the SP546 set is intended as a like-for-like replacement for many factory part numbers listed for Ford, Lincoln, and related models. Before ordering, confirm compatibility with your vehicle year, make, model, and original equipment (OE) part number.

How will these spark plugs affect my engine’s performance?

Replacing worn plugs with the BDFHYK SP546 can sharpen throttle response and promote more complete combustion without altering engine tuning. The fine iridium tip requires less voltage to ionize the gap, producing faster, more reliable ignition events under normal driving conditions.

• Faster, more sensitive ignition jumps for smoother starts.
• Improved combustion efficiency that can help maintain factory power output.
• Reduced misfires compared with heavily worn plugs.
• OE-standard fitment for straightforward replacement.

What makes the SP546 plugs durable and long-lasting?

Durability comes from a combination of materials and manufacturing quality: an extremely fine iridium center electrode resists erosion, while isostatic ceramic insulators provide high density and excellent electrical insulation. These design choices extend the usable life compared with standard copper plugs.

• Iridium center electrode for wear resistance and stable spark gap.
• Ceramic insulators for strength and thermal stability.
• Manufactured to TS16949 quality processes for consistent production.
• Typical economic service life in the range of 30,000–40,000 km under normal conditions.

Are these plugs compatible with my vehicle and original part numbers?

The SP546 is marketed as compatible with many Ford and Lincoln vehicles, including F-150, Expedition, F250–F450, Navigator, and Mark LT models that use the 5.4L V8 configuration. Always verify match by checking your vehicle’s year/make/model and OE replacement number before purchase to ensure proper fit and function.

• Compatible or cross-referenced with: 13292-9499451, F1000-399477-MTR, HT15, MOFSP515, PZH-14-F, PZH14F, SP507, SP546, SP-546, SP515.
• Designed for direct-replacement installation — no aftermarket modification required.
• Sold as an 8-pack to service all cylinders in a 5.4L V8 engine.
• Confirm OE number to avoid purchasing the wrong plug variant.

Who is this for? This 8-pack of BDFHYK SP546 iridium spark plugs is aimed at DIY mechanics and professional technicians replacing worn or damaged plugs on Ford 5.4L V8 engines from 2004–2008, plus owners of compatible Lincoln and Ford truck models seeking OE-style performance and extended service life. If you need an OE-fit, iridium-tipped plug set that emphasizes reliable ignition, long-term durability, and straightforward installation, the SP546 is a practical choice. Remember to check compatibility against your vehicle’s specific OE part number before ordering.

FAQ

Q: Do SP546 plugs fit a 2006 Ford F-150 5.4L V8?

A: Yes, the SP546 8-pack is listed for Ford F-150 5.4L V8 engines from 2004–2008, but always confirm with your vehicle’s OE part number before buying.

Q: How long do BDFHYK iridium spark plugs typically last?

A: Under normal driving conditions these iridium plugs commonly offer an economic service life around 30,000–40,000 kilometers.