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Review on NGK 7397 Performance Spark Plug - Enhance Engine Optimization by Adam Krueger

Name: NGK 7397 Performance Spark Plug - Enhance Engine Optimization
Item: NGK 7397 Performance Spark Plug - Enhance Engine Optimization
Rating: 5

September 16, 2022

Great for Avalanche Z66 '03

You can definitely feel the difference when accelerating. Make sure you have a short 1.5" extension, a typical 3" extension causes a BIG problem with a narrow quarter. Wear thick gloves, your fingers will thank you.

Pros

Corrugated ribs prevent burnout

Cons

Plenty

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