💥 NGK Standard Spark Plug (7397) - Maximize Engine Performance Review

I installed these spark plugs on my 2002 6.0 liter Escalade engine. It's a little smaller than the Acdelco but fits well.

Product image is misleading. This is for one spark plug, not for a box of 4 as shown in the picture. Arrived quickly but is being returned due to misleading advertising.

Replaced the original spark plugs with a 2009 Chevy Suburban Z71, 5.3L, 105,000 miles. Shipped quickly and works perfectly. Apply some anti-seize compound to the threads before screwing into the motor.

What do you say? Those are spark plugs. Expensive compared to non-iridium plugs but should last 100,000 miles like the ones they replaced. No improvement in mileage or performance but nothing to expect.

I love having these spark plugs in my car. They are of high build quality and fit well and smoothly. Out of the box, they have a slightly smaller gap than advertised, and adjusting the gap is a little more difficult than regular plugs. Luckily the Iridium center electrode making them harder to break gives them high power, I can live with that.