NGK 97506 2 STEP COLDER SPARK PLUGS

NGK 97506 Laser Iridium spark plugs are engineered for high-performance turbocharged BMW engines requiring stronger ignition stability under increased cylinder pressure. Originally an OE-style plug for some newer BMW turbo applications, the 97506 has become a go-to upgrade for modified N54 and N55 setups because of its colder heat range and excellent resistance to spark blowout.

Key features include:

• Fine-wire iridium center electrode for improved ignition efficiency
• Platinum ground electrode for long service life
• Better spark stability under high boost
• Reduced misfire potential on tuned vehicles
• Excellent compatibility with ethanol blends (E30–E85), upgraded turbos, and aggressive ignition timing

For BMW applications:

• On the N54, the 97506 is generally considered 2 steps colder than stock
• On the N55, it is commonly considered 1 step colder than stock

Recommended Uses

These plugs are commonly recommended for:

• Stage 1 / Stage 2 tuned N54 & N55 cars
• E30–E85 ethanol blends
• Higher boost pressure setups
• Upgraded turbochargers
• Water/methanol injection applications
• Track or aggressive driving use

FITS THESE ENGINES: