6 PCSNEW — DENSO #4503 PLATINUM T T Spark Plugs — PK16TT

🔧 What Do These Fit?

These are commonly used in a wide range of Honda, Acura, Toyota, Lexus, Nissan, and Infiniti engines, especially V6 applications.

✅ Common Honda / Acura Fitment

• Honda Accord V6 (3.0L / 3.5L) – ~2003–2017

• Honda Odyssey (3.5L) – ~2005–2017

• Honda Pilot (3.5L) – ~2005–2017

• Honda Ridgeline (3.5L) – ~2006–2017

• Acura TL / MDX / RL (V6 engines) – various years

✅ Also Found In:

• Select Toyota / Lexus V6 engines

• Some Nissan / Infiniti V6 applications

Genuine 6 pack DENSO Platinum TT 4503 Spark Plug

⚠️ Important Fitment Notes (aka don’t guess)

• These are 6 plugs, so they’re meant for V6 engines

• Heat range = 16 (DENSO scale)

• Not for turbo or highly modified setups needing colder plugs

• Always match OEM plug spec or cross-reference before installing

DENSO Unique Twin-Tip Structure
1.1mm platinum center electrode

🧠 What Makes Platinum TT Different?

DENSO’s Twin-Tip design uses:

• A platinum center electrode

• A titanium-enhanced ground electrode

This creates:

• More efficient spark

• Better fuel combustion

• Improved fuel economy

• Longer service life

Translation: smoother engine, less maintenance, fewer headaches.

360 Laser welding

🚗 Real-World Benefits

• Faster, more consistent starts

• Smoother idle

• Better throttle response

• Improved fuel efficiency

• Long lifespan (typically 60k–100k miles)

Not flashy—but very noticeable if your old plugs are worn.

The Titanium-enhanced alloy on the ground electrode also increases durability, which is critical to minimize tip erosion and achieve the new Twin-Tip design.

🔥 When Should You Replace Them?

If you’re seeing:

• Misfires

• Rough idle

• Poor MPG

• Slow starts

…it’s probably time.

Or if you can’t remember the last time they were changed—yeah, it’s time.

💡 Pro Tip (Save Yourself the Headache)

If you’re doing plugs:

• Do all 6 at once

• Check coil packs while you’re there

• Use proper torque specs (don’t Hulk it)

🏁 Bottom Line

The DENSO PK16TT Platinum TT plugs are a reliable, OEM-quality upgrade for V6 engines that need smooth performance and long life. They’re not trying to be race plugs—they’re trying to make your engine run right.

And honestly, that’s exactly what most people need.