Brand New Blitz Iridium Plug Spec 77 14438 Range 8 These are brand new, retails for $20 each ($80 a set, without shipping) Selling for $70 shipped, set of four spark plugs.

We installed Denso Iridium Spark Plugs in a few stock WRX's, it really helps for smoother idle. WRX's boosting more psi will gain a few HP with better sparks. It was dyno tested on a Ford Lightning with 10k miles, and it gained 13HP at the wheels. I'm not trying to exaggerate, but its true. This is a cheap upgrade, and great for needed tune ups. They fit right in, just need to be gapped correctly.

These high performance spark plugs allow for easy start-ups and prevent misfire during any driving conditions.

• .06mm iridium tip
• High corrosion-resistant nickel-plated housing
• Iridium spark plugs last longer than conventional plugs and perform more consistently
• MGK to the exacting specs of BLITZ racing
• Great durability and long life
• Tapered graound electrode