Jeep 4.0L Performance Kit – Header, Ignition Coil & Spark Plug Wires

Upgrade your legendary Jeep 4.0L engine with a carefully selected combination of high-performance components designed to improve power delivery, ignition stability, and overall driving response both on and off the trail.

This performance kit combines a Twisted Steel 4.0L Header, a high-output ignition coil, and Blue Streak® 8.5 mm performance spark plug wires to deliver smoother exhaust flow, stronger spark energy, and improved engine efficiency.

The stainless steel header features 1.5" 14-gauge 409 stainless tubing, TIG-welded construction, and a true merged collector design for optimized exhaust scavenging and improved throttle response. The high-performance ignition coil delivers up to 42,000 volts for a stronger and more stable spark, while the Blue Streak® performance wires provide exceptional heat resistance and maximum voltage transfer under extreme conditions.

Designed for Jeep Cherokee XJ, Wrangler YJ/TJ, Grand Cherokee ZJ, and Comanche models equipped with the legendary 4.0L inline-six engine.

Features:
✔ Improved throttle response and engine efficiency
✔ Stronger and more stable ignition performance
✔ High heat resistance for demanding off-road conditions
✔ Premium performance components selected for Jeep 4.0L applications
✔ Direct-fit installation with minimal modifications required

Built for enthusiasts who want real performance, reliability, and durability from their Jeep 4.0L.