Reviewed By Bryan I (San Antonio, TX) Reviewed for a 2007 GMC Yukon —3/5/2011 2:31 PM
Bought them for the jeep. Averaging 17-18 mpg's, now up to 18-19-20 mpgs, also have a k&n air filter but the new plugs work great.
Reviewed By Robert K (Blairsville, GA) Reviewed for a 2003 Chevy Silverado —4/14/2015 8:16 PM
For the most part the cables installed easily with the necessary click to indicate they were securely connected. The problem is they are too long. I have JBA headers and a couple of the wires will be laying against headers if I don't keep a close eye on them.