These wires are longer than the ones I replaced. I turned the boot on the coil pack to make them work, hence loopy. After a little more research, I found that GM used a different coil pack on some 2004-2005 models that require a longer plug wire. Regardless of the length, these wires are excellent and I have no doubt about Bosch quality and you can't beat the price at half off. These are really five star wires that are too long for a perfect fit. Don't forget the dielectric grease.