Factory plugs are factory for a reason. They work well on a factory engine but as you get more performance oriented, theres a higher need for a better spark. Having a consistent, more powerful spark ensures you that your ignition system is up to level with the rest of your performance parts
Great factory replacement for those worn out plugs after 30k miles.
Iridium is a precious metal that is 6 times harder and 8 times stronger than platinum, it has a 1,200(=F) higher melting point than platinum and conducts electricity better. This makes it possible to create the finest wire center electrode ever. Prior till now, platinum had been favored for long life or performance spark plugs due to its high melting point, also the technology did not exist to machine and bond iridium on a spark plug electrode(at least in a cost effective manner). The strength, hardness and high melting point of iridium allows NGK to manufacture their iridium ultra-fine wire center electrode to 0.7mm. One of the finest firing points in the industry! (Thus far there has been no problems reported regarding use of iridium plugs with nitrous oxide.)
HPAutoworks recommends these plugs as a performance upgrade over stock plugs. We have seen smoother dyno charts and moderate gains in horsepower and torque. We use the NGK LFR5AIX plugs in our high powered N/A Spec V's with no problems.
For turbocharged or NOS applications we recommend the LFR6AIX-11 plugs.
This product was added to our catalog on Wednesday 01 February, 2006.
