McLaren Weistec M838T Spark Plugs (One Step Colder)

Weistec M838T spark plugs are designed and manufactured for higher power applications. The factory plugs do not handle the M838T’s high cylinder pressures very well and frequently result in misfire problems, especially on modified vehicles. This can often be the weak point when chasing 700whp and we’ve witnessed it occur on the dyno.

The M838T spark plugs are also 1 step colder to help prevent pre-ignition in engines that are making more power than stock allowing you to further push the envelope of your vehicle.

• Higher Output for High Boost Applications
• Colder range for better performance with increased horsepower levels
• Direct replacement / bolt in for M838T / M840T engines
• Suitable for all M838T / M840T vehicles from stock to highly modified

IMPORTANT NOTE:  Please be sure to check and set spark plug gap prior to installation.

ABOUT WEISTEC:  Based out of Orange County California, Weistec Engineering is an industry leader in research, development, and design. Engineering and design are the core services of Weistec. Combined experience from mutiple fields by our technical department allows Weistec Engineering to offer an array of services and capabilities.