Mercedes AMG M177 M178 sparkplugs

M177-M178 HKS Spark Plug set

Shipping calculated at checkout.

HKS M-Series Super Fire Racing spark plugs are high performance Iridium plugs designed to handle advanced levels of tuning and provide Improved ignition performance, durability and anti-carbon build-up M-Series Super Fire Spark Plugs

Order in the next [totalHours] hours %M minutes to get it between and

HEAT RANGE: Standard heat range

Standard heat range
Colder heat range

masteramerican expressapple paygoogle paypaypalshopify payvisa

ECU Reflash required? NO

Availability : In Stock Pre order Out of stock

HKS Spark Plugs to suit M177-M178 4.0 litre BiTurbo engines.

A noticeable difference in performance over other brands. 

  • Smoother acceleration
  • More Power
  • More reliable

Choose from standard heat range (Suggested for up to stage 2 vehicles) or one heat range colder (stage 2+ and more)

About Spark Plug Heat Range:

Hot Plugs    

have a longer insulator that prevents heat transfer into the water jackets. It keeps more heat in the tip of the spark plug, which helps burn off combustion chamber deposits. But if there's too much retained heat, the engine will experience preignition.

Colder Plugs    

have a shorter insulator and retains less heat at the tip end are only required when higher boost levels cause increased cylinder head temperatures. If the plug is too "hot" pre ignition may occur. —but if it's too cold, deposits accumulate and eventually the plug will foul.


HKS M Series Superfire Racing Spark Plug
Set of 8 new plugs



What's Included?

Included in the box:Set of eight (8) SHK Spark Plugs

Installation Information

Whilst this product is relatively easy for the average, skilled home mechanic to install, we still suggest it be installed by a professional mechanic.
This product requires no special tools to install.
This product does not cause a CEL (check engine light)