Brisk Silver Racing RR14S Spark Plugs 4 Pack - Ford Focus ST 2013-2018, Focus RS, 2015+ Mustang 2.3L - 1 Step Colder


by: Brisk

  • $39.96
  • 6 reviews

The Brisk RR14S spark plugs have a colder heat range compared to the stock spark plugs and a non-projected tip for an additional decrease in spark plug firing tip temperature. For modified 1.6L/2.0L, 2.3L & 3.5L EcoBoost. With non-projected tip. These spark plugs also work on the 2017-2019 Ford Raptor 3.5L EcoBoost, and 2014-2019 Ford Fiesta ST.

Spark Plug Heat Range

In identical spark plug types, the difference from one heat range to the next is the ability to remove approximately 70°C to 100°C from the spark plug center electrode and ceramic tip. A projected style spark plug firing tip temperature is increased by about 15°C to 25°C.

Heat range is the measure of how fast the spark plug tip dissipates combustion heat. It must do this in a precise and controlled manner so the spark plug will:

  • Stay cool enough to avoid pre-ignition and/or electrode destruction due to detonation.
  • Run hot enough to burn off combustion deposits that would otherwise collect on the insulator tip and cause fouling that results in misfire.
  • Adapt to specific engine characteristics and widely varying driving/load conditions.

Key Benefits and Applications of Brisk Silver Racing Spark Plugs

• Silver is the best Electric and Heat Conductor - the best material for performance and racing spark plugs
• Superior Ignition Ability Increases Engine Power
• Lower Required Supplied Ignition Voltage
• Good Resistance to Fouling and Easier Starts
• Race Engines and Engines with Hard to Ignite Fuels
• Supercharged / Turbocharged / Nitrous engines
• Excellent for Total Loss Ignition Systems
• Excellent Spark Plug Choice for any Vehicle, Tuned or Modified, even for High Mileage Vehicles and Vehicles With Oil Consumption Problems
• Recommended Gap is .026" ~ .028"
• Approximately 20,000 mile service life

Customer Reviews
5.0 Based on 6 Reviews
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Filter Reviews:
Cody B.
United States United States

Got exactly what i wanted faster than I expected

Josh S.
United States United States
Brisk plugs for focus st

Product was a perfect fit. Car seems to idle smoother and fires right up with zero hesitation.

Tyler M.
United States

Really well made product and you can't beat the price

Andrea L.
top spedition

spedition from USA to Switzerland in 2 work day. perfect service

Earl B.
United States
Brisk racing spark plugs the best

My first experience showed I selected the wrong plug. Once I selected the RR14S and gapped @ .028 with the FRPP tune the car instantly showed a response. Power was already there its just more responsive power