SYKRSS Ignition Coil and Iridium Spark Plug Kit for 5.7L HEMI V8 — 8 Coils & 16 Iridium Plugs, Direct-Fit (2008–2017)

Complete drop-in ignition kit: eight replacement coils plus sixteen premium iridium spark plugs engineered to restore ignition performance for 5.7L HEMI V8 vehicles.

If your Dodge, Chrysler, Jeep or Ram equipped with a 5.7L HEMI is showing rough idle, reduced throttle response, or a persistent check engine light, replacing worn coils and plugs often returns smooth running and consistent power. This SYKRSS kit installs without modifications and includes parts pre-gapped and matched to factory fitment standards so you can replace all cylinders at once.

Will this kit fit my 5.7L HEMI model?

Compatibility covers many 5.7L HEMI vehicles from 2008–2017, but exact fit depends on the production engine code. You can verify fit by checking the 8th digit of your VIN (engine codes like EZH or ESB indicate compatibility), or send us your VIN and we’ll confirm for free.

• Fits Dodge Challenger (2009–2016), Charger (2009–2017), Durango (2008–2015)
• Fits Ram 1500/2500/3500 (2011–2017), Jeep Grand Cherokee (2008–2017)
• Also fits Chrysler 300 (2009–2017) and Aspen (2008–2009)
• Free VIN check available—message your VIN for fast verification

How do these coils and plugs improve engine behavior?

The coils use heavy-duty materials and the spark plugs feature ultra-fine iridium tips for a stronger, more focused spark. Together they reduce misfires, smooth idle, and improve throttle response compared with worn factory components.

• Silicon-steel cores and high-pressure boots resist heat and cracking
• Japan- and Germany-sourced materials for electrical stability and durability
• Iridium tips provide a hotter, more efficient spark for combustion
• Full-set replacement eliminates cylinder-to-cylinder inconsistencies

Is this a direct replacement and easy to install at home?

Yes — the kit is manufactured as a direct replacement for OEM coil and plug part numbers like UF504 and LZFR5CI-11, pre-gapped to factory specs. Basic hand tools and about 40 minutes are enough for a full swap on most models, and the box includes a simple installation guide.

• Direct-replace coils for part numbers UF504, 56029129AA/AB/AF and more
• Spark plugs pre-gapped to factory specifications (LZFR5CI-11 equivalent)
• Complete kit: 8 coils + 16 spark plugs + installation guide
• Estimated DIY install time ~40 minutes with basic tools

What durability and coverage can I expect?

Components are built to exceed common factory durability with robust insulation and premium internals to withstand heat and voltage stress. The kit also ships with a one-year standard protection plan to cover manufacturing defects.

• High-grade epoxy, reinforced boots and premium wire for longevity
• Engineered to prevent voltage leaks and boot cracking under load
• One-year standard coverage included for added confidence
• Replaces all cylinders at once to prevent recurring misfire issues

Who is this for: This SYKRSS ignition kit is for owners of 5.7L HEMI Dodge, Ram, Jeep, Chrysler and related vehicles who want a full, hassle-free replacement of ignition coils and spark plugs. It's especially useful if you’re experiencing misfires, rough idle, reduced acceleration, or a check engine light tied to ignition components and prefer a complete set that installs quickly at home or by a shop.