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Mazdaspeed NGK 1-Step Colder Spark Plugs - Set of 4

List price: $39.99  
Price: $32.99
You save: $7.00 (18%)
Price in points:  What are Points? 33 points
Save $7.00
GEN-6-147-11
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*** Gapping tools not included, shown for demonstration purposes only. ***

One of the most crucial components of the engine are the spark plugs! Much like the HPFP internals, correct heat range and high quality spark plugs are needed when modifying your Mazdaspeed for higher than OEM power levels. With increased boost pressure and turbo sizes, a 1-step colder spark plug is recommended for peak performance.

CorkSport is helping you take the guess work out of choosing the proper spark plug for your Mazdaspeed build. CorkSport now has pre-gapped NGK 1-step colder plugs ready to buy with your other CorkSport goodies.

Genuine NGK part no. LTR7IX-11

Inspected and pre-gapped to 0.026 inches – the community proven and recommended gap for stock to approximately 450whp builds. For higher horsepower builds discuss the proper gap with your professional tuner. #ZoomZoom!


  • Sold in Sets of 4 Spark Plugs
  • Inspected and pre-gapped to 0.026 inches - recommended gap for stock to approximately 450whp builds. For higher horsepower builds discuss the proper gap with your professional tuner.

Additional Features

  • Vehicle Fitment: 2007-2013 Mazdaspeed 3, 2006-2007 Mazdaspeed 6, 2007-2012 Mazda CX-7 Turbo.
  • CorkSport Service & Support: knowledgeable telephone support at (360) 260-2675.

30 Min Install Time

30 Min Install Time

Difficulty: 1/5

1/5 Difficulty

No CEL

No CEL

Came pre gapped perfectly as described. Car kinda pops lil when you first start it up, totally normal. Take it for a drive and it quickly goes away. Overall satisfied with this product
Write a review

If I need these pre gapped at 0.024 which is what my tuner recommended, can you do that with my order?

Asked by Gabriel | 09/27/2022, 07:50 PM | 1 answer(s)

Mi auto solo tienen inlet, intake, Downpipe y tubería original directa (sin catalizadores)... Estos me sirven??? Por qué me han comentado que para autos que no traen internos de bomba y tampoco reprogramaciones, deben de ser bujias de Iridium a .033... Es correcto? O puedo usar estás .026 en mi auto casi estock?

Asked by Melesio Pérez resendiz | 05/12/2022, 10:55 PM | 1 answer(s)

Any recommended manufacture for coil pack and wires upgrades to go along with these awesome plugs?

Asked by Mike | 05/01/2022, 08:48 AM | 1 answer(s)

I bought these pre gapped and two of them came with a 0.027 and 0.028 gap is that okay?

Asked by Kevin Centeno | 02/07/2022, 06:38 PM | 1 answer(s)

Are these plugs ok with 2011 MS3 with only SRI and TIP? Just looking for general health for engine for now.

Asked by Mike  | 09/11/2021, 06:55 PM | 1 answer(s)

Would these fit in a 2004 Mazda 3 2.0L engine?

Asked by Ricardo Roland | 06/19/2021, 12:52 AM | 1 answer(s)
Mazda performance parts financing is available with CorkSport

Looking to finance your parts purchase and want to get 6 months NO interest on any purchase over $199? Click on the image above for more details.

2007-2013 Mazdaspeed 3
2007-2013 MPS 3
2006-2007 Mazdaspeed 6
2005-2007 MPS 6
2007-2012 Cx7 Turbo