Review on 🔥 Enhance Performance with MAS 8.5mm Spark Plug Ignition Wires for Chevy/GMC 1999-2006 LS1 VORTEC 4.8L 5.3L 6.0L Engines by Kenneth Foster

But they look cool curled up a little. I have round coils which I think are closer to spark plugs. Put on red spark plug guards so they work with my Kooks heads. Kooks also recommends trimming the flat tabs on the black spark plug boots to get clearance, which was easy and seems to work. Update: This has made the idle stumble worse. Went back to the previous wires and the idle improved greatly. It may have been too long or just an incompatibility with the Chevy engine, but ultimately I have to say "skip" this purchase. Very disappointed!