Here at Sneed4Speed we are doing free shipping on all Brisk spark plugs until Tuesday 10-11-2016. Silver is the best conductor of any metal! It conducts 560% more electricity & 481% more heat than Platinum, and 276% more electricity & 177% more heat than Iridium. This is the secret to our success and why our spark plugs are unparalleled in quality and performance. Silver spark plug electrodes transfer electricity & heat better than any other spark plug material resulting in the most powerful spark! This is beneficial for a full complete combustion of the available fuel and air in the combustion chamber, combustion efficiency creates horsepower gains. What separates the Brisk LGS spark plug from the rest is how it utilizes its construction to deliver the best and most effective spark to your engine. It does this through a massive integrated side electrodes that ensures superior heat removal that eliminates electrode burn off during harsh race conditions. The extremely long electrode helps by protruding deeper into the combustion chamber causing it to be unshielded by the ground straps allowing it to carry a more powerful charge. This combination allows the Fuel/Air mixture to ignite more spontaneously letting the flame front spread out in an unrestricted, uniform way reducing detonation yielding more power. Use coupon code FREESHIP.