Review on Bosch 9613 Double Iridium Longer by Deep Echemendia

Install them in a 2006 Tacoma with 72,000 miles performance dropped. Plug them in and they light up right away and seem to improve performance a bit. The Tacoma doesn't have the greatest gas mileage and they may have increased it by 1 or 2 mpg. I've got a few more tanks to fill to see. If you are unsure whether you need to replace your spark plugs, you can order them to have them on hand when you do. Check them carefully as they were packed loose. I suggested that Revane wrap her in peanuts rather than those airbags. They were ok but I wish they wouldn't bounce.