Katech Spark Plug Wire Insulator

Katech Spark Plug Wire Insulator

EXTREME HEAT PROTECTION · FLEXIBLE FIBERGLASS CONSTRUCTION · HELPS PREVENT SPARK PLUG WIRE DAMAGE

The Katech Spark Plug Wire Insulator provides an added layer of thermal protection for spark plug boots and wires exposed to elevated exhaust temperatures. It is especially beneficial for high-performance vehicles equipped with long-tube headers, turbocharger systems, or other exhaust configurations that position spark plug wires near high-heat components.

Constructed from flexible knitted E-glass fiberglass, the insulator slides over the spark plug boot and wire while conforming around irregular surfaces. By helping shield the spark plug wire and boot from radiant and conductive heat, it helps reduce the risk of melted wires, heat-related ignition misfires, and inconsistent engine performance.

Features & Benefits

• Provides Thermal Protection for Spark Plug Boots and Wires
• Rated for Temperatures up to 1,200°F
• Helps Protect Against Radiant and Conductive Exhaust Heat
• Helps Reduce the Risk of Melted Spark Plug Wires and Heat-Related Misfires
• Constructed From Premium Knitted E-Glass Fiberglass
• Non-Toxic and Non-Flammable Construction
• Flexible Single-Wall Design Stretches Over Irregular Surfaces
• Large-Diameter Design Accommodates Common LS and LT Spark Plug Boots
• Slides Over Existing Spark Plug Boots for Straightforward Installation
• Suitable for Long-Tube Header, Turbocharged, Supercharged, and High-Heat Applications
• Compatible With a Wide Range of V8 Spark Plug Wire Applications

Specifications

• Product Type: Spark Plug Wire Insulator
• Material: Knitted E-Glass Fiberglass
• Construction: Flexible Single-Wall
• Maximum Temperature Rating: Up to 1,200°F
• Installation Method: Slide-On
• Application: Compatible Spark Plug Boots and Wires

Vehicle & Engine Fitment

Vehicle Applications

Chevrolet

• 1997–2019 Chevrolet Corvette Equipped With Compatible LS or LT Spark Plug Wires
• 1998–2002 Chevrolet Camaro Equipped With Compatible LS Spark Plug Wires
• 2010–2024 Chevrolet Camaro Equipped With Compatible LS or LT Spark Plug Wires
• Chevrolet Silverado Equipped With Compatible V8 Spark Plug Wires
• Chevrolet Tahoe and Suburban Equipped With Compatible V8 Spark Plug Wires

Cadillac

• 2004–2019 Cadillac CTS-V Equipped With Compatible LS or LT Spark Plug Wires
• 2022–2024 Cadillac CT5-V Blackwing Equipped With Compatible LT Spark Plug Wires
• Cadillac Escalade Equipped With Compatible V8 Spark Plug Wires

GMC

• GMC Sierra Equipped With Compatible V8 Spark Plug Wires
• GMC Yukon and Yukon XL Equipped With Compatible V8 Spark Plug Wires

Pontiac

• 2004–2006 Pontiac GTO Equipped With Compatible LS Spark Plug Wires
• 2008–2009 Pontiac G8 Equipped With Compatible V8 Spark Plug Wires

Dodge

• 2005 Dodge Magnum R/T Equipped With a 5.7L Gen III HEMI Engine
• 2005 Chrysler 300C Equipped With a 5.7L Gen III HEMI Engine
• 2005 Dodge Ram Equipped With a 5.7L Gen III HEMI Engine
• Dodge Challenger Drag Pak Race Vehicles Equipped With Compatible Gen III HEMI Spark Plug Wires and Boots

Engine Applications

• GM Gen III LS-Based Engines
• GM Gen IV LS-Based Engines
• GM Gen V LT-Based Engines Equipped With Compatible Spark Plug Wires
• RHS LS-Based Engine Blocks and Engine Builds
• GM LS1, LS2, LS3, LS6, LS7, LS9, and LSA Engines
• GM LT1, LT2, LT4, and LT5 Engines Equipped With Compatible Spark Plug Wires
• Gen III HEMI 5.7L Engines
• Gen III HEMI 6.1L Engines
• Gen III HEMI 6.2L Supercharged Engines
• Gen III HEMI 6.4L / 392 Engines
• Dodge Challenger Drag Pak Gen III HEMI Race Engines
• Mopar Hellephant 426 Supercharged HEMI Crate Engines
• GM V8 Truck and SUV Engines Equipped With Compatible Spark Plug Wires
• Custom V8 Performance and Racing Engines Utilizing Compatible Spark Plug Boots and Wires

Important Fitment Notes

• The Vehicle and Engine Applications Listed Above Are Representative and Are Not a Complete Fitment List
• Designed for Compatible GM LS, GM LT, RHS LS-Based, Gen III HEMI, Dodge Challenger Drag Pak, Hellephant, and Other V8 Engine Applications Utilizing Spark Plug Wires
• Fitment Is Determined by Spark Plug Boot Size, Wire Configuration, and Available Clearance, Not Solely by the Vehicle or Engine Model
• The Flexible Large-Diameter Design Accommodates Common LS, LT, HEMI, and Other V8 Spark Plug Boots
• Suitable for Larger-Diameter Performance Spark Plug Boots and Wires Where Adequate Installation Clearance Is Available
• Recommended for High-Performance, Racing, Turbocharged, Supercharged, Nitrous Oxide, and Long-Tube Header Applications Exposed to Elevated Exhaust Heat
• Verify Spark Plug Boot Diameter, Insulator Length, Wire Routing, and Available Clearance Before Ordering
• Confirm the Insulator Does Not Interfere With the Spark Plug, Cylinder Head, Exhaust Manifold, Header, or Other Nearby Components
• Do Not Install Over Damaged Spark Plug Wires or Boots
• Inspect the Spark Plug Wire and Insulator Periodically for Heat Damage, Abrasion, or Deterioration

Why Choose Katech?

Since 1977, Katech has engineered championship-winning engines and performance components for professional motorsports, OEM development programs, engine builders, and performance enthusiasts. Every Katech product reflects a commitment to purposeful engineering, reliable performance, and demanding real-world validation.

The Katech Spark Plug Wire Insulator provides a straightforward solution for protecting ignition wires in high-temperature engine environments. Its flexible fiberglass construction helps shield spark plug boots and wires from damaging exhaust heat while helping support reliable ignition performance in street, racing, and high-performance applications.