McLaren Weistec M838T Spark Plugs (One Step Colder)
- In stock, ready to ship
- Backordered, shipping soon
DETAILS
+ Fits all McLaren MP4-12C / 650S / 600LT / 570S / 570GT / 540C models with M838T engine
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 engines
- Suitable for all M838T 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.
SHIPPING: Usually ships same or next business day. Contact us for expedited orders to ensure proper delivery time.
Processing Time: Orders are typically processed within 1–2 business days. Custom or special-order items may take longer—lead times will be noted in the product description if applicable.
Shipping Methods: We ship via USPS, UPS, and FedEx depending on item size, weight, and destination.
Order Tracking: Once your order ships, you’ll receive a confirmation email with tracking information.
Shipping Restrictions: We currently ship within the U.S. Oversized or freight items may require additional handling time and incur additional charges.
Signature Requirements: Some high-value orders may require a signature upon delivery for added security.
Need Help? If you have questions about shipping before placing your order, contact us or give us a call at (239) 992‑0437.
