Denso Iridium TT Spark Plug - 4711 (IXEH20TT)

Huge change in smoothness and performance great quality!

The Denso and equivalent Bosch plugs are essentially identical in terms of performance. The decision on which to buy simply which is cheaper. The one aspect to keep in mind, apply a very small dab of an anti seize compound to the leading edge of the threads. This is cheap insurance in that the plug can be taken out without damaging the threads in the head.

Apparently they are the OEM manufacturer for spark plugs for Mazda. Probably other Japanese makers too. Fit perfectly and my car runs smoothly again.

Perfect fit for Corolla LE Eco 2016. Combined with TRQ Engine Ignition Coil Boot Kit Set of 4, it resolved a strange jerking of car. Spark plugs replaced at 140K miles.

My 2013 plug in Prius is approaching 120k. The 120k service from Toyota for this car is basically the usual $60 oil change, but they do the spark plugs too. They quoted me about $650 for that service! Hmmmm....let me think about that. No. These are oem plugs for the 2010-2015 Prius. At around $7 each and an hour of my time, it’s a no brainer. Now my Prius is good to go for another 120k. And yes, it’s about an hour to change these on the Prius. Totally worth it.

Installed these plugs in my 2014 Mazda 6 with the Skyactiv 2.5 engine at 74,000 miles. Denso is one of my go to brands for spark plugs as I have always had good service from them over the years. The plugs appear to be of great quality and come well packaged with a plastic tube over the electrode area that protects the plug from damage during shipping. This is an easy DIY job on this engine as it only requires a 14mm deep socket and a magnetic pickup tool to get the plug out of the well once it is loose. I did put a little anti-seize on the threads before installing (probably not necessary but makes me feel better.) I used a length of fuel line slipped over the plug to guide the plug down to the head and get the threads started. Torqued to 13 lbs with a torque wrench but can be installed using the "fractional turn after finger tight" method found online.

Good product at the right price

Installed these to replace the original plugs at 90k. The fit was perfect and they smoothed out a slightly rough idle. Recommended!

C'est les mêmes que celles d'origine avec des performances au top. Ideal pour du Toyota et surtout si vous mettez de l'éthanol

Ottimo prodotto

Excelente calidad, es lo que buscamos los clientes, de verdad que se nota el cambio en el desempeño del auto, de usar bujias convencionales, a las de Iridium originales. Estoy muy contento con el producto.

Instaladas en Toyota rav4 2020. Van perfectas para este motor. Incluso funciona más suave que con las originales.

These are the original equipment spark plugs for a 2010 Toyota Matrix, 1.8 Base model. Exactly the same as the ones I pulled out. Shipment came quickly and the seller responded quickly when I had an enquiry and they are Canadian which is a bonus for us folks living North of the boarder!