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

Just installed these on my son's 2005 Chevrolet Suburban (5.3L) and they work perfectly. The old AC Delco's were in rough shape and one of them snapped when it was removed. Contrary to some of the review's I didn't have any issues with installation of these wires as they all have plenty of clearance (might need to clock them accordingly) and the boots on the spark plug offer the same positive 'click" when installed on the spark plug so you know they are fully seated. The only issue I found, was getting the plug to align on the coil side was a little finicky as the connector is offset, it's not a big deal as you apply pressure while you rotate the boot back and forth and it will seat fine. We'll see how long these last and I'll update my review accordingly, but I found the quality to be excellent (especially for the price) and the car does seem to be a bit more responsive off idle and idles buttery smooth (fyi - I didn't have any misfires of rough idle before). Good wires and I'd recommend them!!!

Wires are nice a thick, price is on point and shipping was fast. What more can you ask for. Quality after several months and no issues, would definitely buy again.

Very durable and great price. Fit my 2012 chevy silverado LT 6.2L v8 perfectly.

Exactly fit 07 1500 express 5.3Good quality. They seem better then what I get from the auto store.

I love how these wires look. Definitely better than OEM. They look and feel solid and durable. I bought these for a 3007 Suburban 5.3. The fit was great for cylinders 1-7. On cylinder 8, the the wire pushed against the AC Dryer heat shield. I can see this wire, for this one cylinder, rubbing against the heat shield. I'm unsure how long this wire will last. The l OEM wires were not as thick, so they wear easily routes around the heat shield. Overall, I love the wires and their appearance.

Fixed My Misfire and Boosted MPG — Worth Every PennyI bought these for my 2003 Escalade with the 6.0L engine after dealing with some frustrating misfires. I was hopeful they’d help—and they did more than that.Not only did they completely eliminate the misfires, but I’m now getting 4 more miles per gallon. That kind of improvement means these parts will pay for themselves in no time.Solid performance, great value — I’m all in at 5 stars. If you're having similar issues, don’t hesitate. This is the fix.

Work great. Fitment was great. Heat resistance seems good so far. Also, they look cool whenever looking at the motor. Definitely a plus. Would 100% recommend!

These work great for the price. I have used these on a few customers trucks and been happy with the performance of them. Similar to msd without the msd prices. Multiple vehicles and even recommended to others so far yet to hear anything negative on any of the sets from multiple applications.