Size Chart
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The Kooks universal spark plug boot sleeves provide 1,200 °F heat protection for 8–9mm ignition wires on any high-performance engine, shielding boots from header and exhaust manifold heat to prevent cracking, hardening, and misfires in extreme under-hood environments. These double-wall woven fiberglass sleeves with silicone coating install in seconds with no wire removal and feature the iconic red Kooks logo for a clean, factory-look finish.
Designed for LS, Coyote, HEMI, and all V8 applications running headers or tight-clearance exhaust, the 6-inch length covers the entire boot and first few inches of wire while allowing full articulation. The natural color with red logo resists discoloration and maintains flexibility even after thousands of heat cycles.
For enthusiasts demanding reliable ignition performance in high-heat builds, the Kooks 750201 sleeves are the proven, reusable solution trusted on 1,000+ HP street and race cars worldwide.
California Proposition 65: Contains chemicals known to the State of California to cause cancer or reproductive harm.
Warranty: Limited lifetime against manufacturing defects to original purchaser.
| Application | Wire Diameter |
|---|---|
| Universal V8 Engines | 8mm – 9mm Wires |
Note: Universal fit for any 8–9mm spark plug wire with standard boots.



