8PCS 2500° Spark Plug Heat Sleeve 6" Long Spark Plug Lead Heat Shield Protection Cover Replacement for LS1 LS2
Spark plug lead heat shields work By creating a protective thermal barrier around the silicone rubber boots and delicate wires of your LS1 ignition system.
Because the LS1 engine has a coil-on-plug setup, its spark plug leads are incredibly short. This design positions the rubber boots directly next to the cylinder head exhaust ports. If you install aftermarket long-tube headers or extractors, the clearance becomes even tighter, exposing the leads to extreme radiant heat.
Here is exactly how these shields protect your LS1 from melting and misfiring:
1. Blocking Radiant Heat Transfer
The primary job of a heat shield is to interrupt radiant heat emission. Exhaust headers can easily reach temperatures between 400°C and 700°C under load.
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Fiberglass/Titanium Socks: These utilize tightly woven volcanic rock or fiberglass filaments to slow down thermal transfer. The material acts as a high-temperature sponge that absorbs and dissipates the heat before it can penetrate the silicone boot underneath.
2. Preventing Material Degradation
Factory or standard aftermarket ignition leads are typically coated in silicone rubber. While silicone handles engine bay temperatures well, prolonged exposure to direct exhaust heat causes it to:
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Dry out and crack: Allowing voltage to leak.
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Melt completely: Exposing the inner core wire directly to the hot metal.
By keeping the internal temperature of the boot well below the melting point of silicone, the shield ensures the boot remains flexible and structurally intact.
3. Eliminating "Voltage Arcing" (Misfires)
When an LS1 lead gets too hot, the electrical resistance inside the wire increases. If the silicone boot degrades or cracks from heat stress, the high-voltage electrical current (often over 30,000 volts) takes the path of least resistance. Instead of traveling to the spark plug tip, the spark arcs (jumps) straight through the melted boot into the nearby metal exhaust header. This causes a sudden engine misfire, rough idling, and a loss of power.
4. Protecting the Inner Core
Inside your LS1 leads is a delicate carbon-sprayed fiberglass or spiral-wound alloy core that carries the spark. Extreme heat permanently damages this core, drastically increasing its electrical resistance even if the outside of the wire looks fine. Keeping the wire cool preserves the integrity of this core, ensuring a strong, consistent spark reaches the cylinder.
Are you currently experiencing a misfire or rough idle, or are you looking to install shields as a preventative measure before upgrading your exhaust?
Specifications
- ID:1"(22mm)
- Length:6"(15.5cm)
- Colour: Black & Titanium
- Type: Boot Heat Sleeve Protector Cover
- Quality Material: high temperature resistant glass fibre material and treated with a proprietary coating, two layers of high temperature fiberglass for added durability.
- Size: Each Boot Is 6inch Length, show as the picture
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Product Name
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Spark Plug Lead Boots Protector
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Item No.
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GSL80579H |
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Product Highlights
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Each Boot Is 6inch Length, ID 0.86inch, Boots Will Work With 90 Degree, 45 Degree, And Straight Spark Plug Boots
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Compatibility
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Fits All Spark Plug Boots And Spark plug boot heat socks Can Withstand Heat rated for 1200°F-1800°F continuous use, 2500°F intermittent.
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Affordable Reliable and Built to Last
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8pcs Spark Plug Lead Boot Sleeves for SBC LS1,LS2 Ect ,Made From Double Wall Braided Fiberglass Sleeving (Triple Wall At Sewn End)
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Easy Installation
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Just Slip On (Sewn End Over Spark Plug ) For Maximum Protection ,Sleeves Can Withstand Heat Up To 1200 Degrees Using Patented Insultherm Technology
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Colours Available
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Black,Titanium
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Weight
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0.17 KG/Bag
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