NGK 97506 spark plugs are the proven performance upgrade for BMW N55 and S55 engines, offering a colder heat range for increased boost and tuned applications. They provide reliable ignition, prevent misfires under load and maintain smooth power delivery in high-performance builds. Supplied as a full set of 6 for complete engine replacement.

Fitment: BMW N55 & S55 Models
SKU: 97506

Key Features

Complete Engine Service Pack

– Set of 6 spark plugs
– Direct replacement for all cylinders
– Convenient full engine upgrade

Colder Heat Range for High Boost

– Designed for tuned and high-performance engines
– Prevents spark blowout under load
– Maintains consistent combustion

Motorsport-Proven Ignition Performance

– Strong spark at high cylinder pressures
– Ideal for Stage 1 and Stage 2 setups
– Widely recommended by BMW tuners

Benefits

– Reduced risk of misfire
– Smoother high-RPM performance
– Increased reliability for tuned vehicles

Fitment

– BMW M135i
– BMW M235i
– BMW 335i
– BMW 435i
– BMW M2 (N55)
– BMW M2 Competition
– BMW M3
– BMW M4

Installation Notes

– Recommended change interval: 10,000–15,000 miles on tuned vehicles
– Gap to tuner specification if required
– Install on a cold engine using correct torque settings

About NGK

NGK is a world-leading ignition specialist and the OEM supplier for BMW, producing high-performance spark plugs trusted in both road and motorsport applications.