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Denso Iridium V12 Century spark plugs

Toyota Century V12 Ignition Service Kit GZG50 1997-2017

Most of these cars nowadays are hitting at LEAST their 61,000 mile/100,000 km mark, often double that. In the interest of getting another 20+ years of reliable daily driving out of them, we have put together this kit!

All parts are OEM new. All gaskets and plug wires are new from Toyota, and the spark plugs are brand new OEM spec'd specifically for the 1GZ V12 engine by Toyota. If your car is running rough, this would be a great place to look!

We dont always have every single part in stock and ready to go, so there may be a wait time of 1-2 weeks before we can ship everything out.

We aim to keep as many of these on the road as possible, and love seeing how popular they continue to be! Only the best for your hand built luxury barge, and nobody knows better than Toyota. Let's relax places!


  • 12 OEM spec spark plugs
  • All 6 spark plug wires, OEM new
  • 2 throttle gaskets
  • 4 throttle to plenum gaskets
  • 2 plenum to runner gaskets
  • 1 lower intake to head gasket
  • Valve cover gaskets for both sides
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  • $455
    • SKU
    • Weight
      4.5 lbs

Most product ships from either the manufacture or largest wholesale location to pass the saving to you. Most orders will ship via UPS, as we will be able to provide the best rates and have had the least issues when using UPS.

IF YOU DO NOT LIKE THE AUTOMATED SHIPPING CALCULATOR'S RATES, PLEASE CONTACT US AND WE CAN GET YOU A BETTER ONE! Especially for anyone outside the USA, please contact us with a list of parts you'd like to order, and where you are located.

We accept the following payment methods:

Also Venmo and unmarked nonsequential dollar bills

  • Fitment Type
    Vehicle Specific
Toyota/LexusCentury1997-2017 GZG501GZ-FE 5.0 V12 VVTi

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