NGK Spark Plug Stock # 4522

The NGK Spark Plug Stock # 4522 (BR9HS) is an OEM-equivalent ignition component designed for mechanics and enthusiasts seeking reliable combustion performance in small-displacement and mid-sized engines. This spark plug is ideal for various applications, including rebuilding carbureted classics, maintaining dependable commuters, or fine-tuning modified street engines.

Engineered with a single-ground-electrode design, the BR9HS features a tapered seat for precise fitment in standard spark plug wells. The nickel-plated electrodes resist corrosion and fouling, ensuring a stable spark gap over extended intervals. This design is crucial for engines running stock fuel maps or mild tuning packages, providing thermal and mechanical stability that translates to fewer misfires and cleaner combustion.

Technicians and DIY builders will appreciate the BR9HS's compatibility with both naturally aspirated and lightly boosted applications. Its robust construction and reliable performance make it a go-to choice for those who demand quality in their ignition components, ensuring optimal engine performance and extended service life.