JDMSPEED High Performance Spark Plug Ignition Wire for 2000-2009 Chevy GMC V8

I was pleasantly surprised with the quality of these wires. They are twice the thickness of the original wires. Installed them with new coils and plugs on a 2013 Sierra with the 5.3 engine and everything is working great. They are slightly longer than the OEM wires but it wasn't an issue.

Good fit, easy to install especially with included heat shield. Compatible as described for the vehicle. Performance is day and night, I also changed plugs I don’t know what hp increase there was but it is significantly noticeable. Thanks for a great product at a fair price!

Look and work great! High quality.

These were great! I tried a different, cheaper set, and they were junk. These plugs though were slightly higher in price but much more durable and made of better quality material. Im happy.

Runs really good and looks good

These are a huge upgrade over the stock AC DELCO wires. Highly recommend them. Perfect fit

Great OEM replacement plug wires great quality and operate as designed highly recommend these.

These wires are the same quality as the ones that cost 3 times as much. You can see how much fatter they are compared to the OEM GMC wires on my 2016 GMC Sierra. I added the JDMSPEED 8PCS Red 1200° Spark Plug Wire Boots Heat Shield Protector Sleeve kit to the wired. They slip oner the metal shield. The wires are about one inch longer than stock and they are 350ohms per foot. The box said 50 ohms, but when I tested them I found 350 ohms.