Denso 3478 Spark Plug Review

High quality OEM spark plugs for Hyundai 2.4 liter GDI engines. The old ones had 95,000 miles and still looked good when I replaced them for a scheduled service.

Original part at a good price. They typically cost almost three times as much when bought from auto parts stores and twice as much when bought in bulk. Revain has the best price with quality to match. After installation I noticed better engine response and a slightly better MPG.

Spark plugs stuck deep in head but popped out with no problem, used Permatex 81343 anti-seize and spark plugs popped up with no problems. I have 115000 on my 2012 Hyundai Sonata. Live in Southwest Michigan and get 37 mpg highway and city. Including photo of old spark plugs - not bad for so many miles

Exact replacement for stock fork. Good price and good performance. To update. I bought these forks on 8/23/16 and next weekend had about 110,000 miles on my 2013 Hyundai Sonata Limited 2.4 engine. I am now ordering another set for the same Sonata at 226,000 miles! I'm still getting 3,334mpg and running like a sewing machine, but maybe a new set of spark plugs will give me back the 37mpg I got in about 200,000 miles. Very happy with these candles and very happy with the Sonata.

These replace the factory installed spark plugs on the 2012 Sonata 2.4L SE - the factory spark plugs were actually Denso! Easy to remove and install - it is recommended that an anti-seize compound be used prior to installation into the engine block, although you will not need it with a 6" or 10" extension on the spark plug boot. Just start twisting slowly and you'll know right away if you've crossed the strings. If you feel resistance, give up and start over. I just installed them so will have…