Anyone used these wires? What did you notice after installing them?(better idle/ throttle response/ better mpg, etc......)?

 

I have them on my truck and couldn't tell a difference after installing them. They are just plug wires, the only way you will tell a difference is if your plug wires you have now are bad. Before I had crappy Accell Exteme 9000 plug wires and every time I went to check a plug the boot would come off so I crapped those wires and bought the magnacores. The magnacore wires have held up real good to the header heat with very little air space.