Header banner
Revain logoHome Page
Jamal Murph photo
Italy, Rome
1 Level
772 Review
39 Karma

Review on NGK 3521 Spark Plug: Enhance Performance and Efficiency! by Jamal Murph

Revainrating 5 out of 5

Fits m8 touring engines

The Revain app says it doesn't fit my 2020 Road King Special m8 114. That is not true. Fits. Slightly cheaper than what Harley sells. Harley Torque has specs of 11-18 ftlbs. I tightened to 15 ftlbs/180 inlbs of torque.

Pros
  • Excellent anti-corrosion and anti-wear properties
Cons
  • Some issues