ThunderCore PRO Coil Boot Kit 900-P2040-8
ThunderCore PRO Coil Boot Kit 900-P2040-8

Coil Boot Kit for 2000-2003 Cadillac DeVille & More - ThunderSpark 900-P2040-8

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$37.99
MPN: 900-P2040-8
UPC: 724620108921
Item Package Quantity: 1
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ThunderCore PRO Coil Boot Kit P/N:900-P2040-8
ThunderCore PRO Coil Boot Kit P/N:900-P2040-8
$37.99

Restore reliable spark insulation across your ignition system with the ThunderCore PRO Coil Boot Kit 900-P2040-8 (also written 900P20408). It's an OE Replacement kit that installs on the 2000-2003 Cadillac DeVille, 2000-2002 Cadillac Eldorado, 2000-2003 Cadillac Seville, and 2001-2003 Oldsmobile Aurora — see the Buyer's Guide tab for engine specifics. In coil-on-plug (COP) and coil-near-plug (CNP) setups, the boot forms the insulative path between the ignition coil and the spark plug; over time heat, vibration, and chemical exposure can degrade it, leading to arc-through, misfires, or hard starting.

  • OE Replacement quality: matched to OE dielectric strength, boot length, and connector geometry.
  • Heat & chemical resistant: built from high-temp silicone and reinforced materials to resist oil, fuel, and under-hood heat.
  • Restores ignition insulation: replaces worn or cracked boots to help maintain proper spark isolation and prevent voltage loss.
  • Complete kit coverage: includes the boots, springs, and insulators needed for full-cylinder replacement — ideal for tune-ups and preventative maintenance.

If a degraded coil boot is the cause of a misfire or hard start, this kit replaces it and helps restore ignition reliability and engine smoothness.

Interchange: 118077

This part cross-references / interchanges with the following part numbers:

118077

Frequently Asked Questions

What does a coil boot do?

In coil-on-plug (COP) and coil-near-plug (CNP) systems, the boot is the insulative path between the ignition coil and the spark plug, providing high-voltage insulation and secure coil-to-plug contact.

What vehicles does this kit fit?

It's cataloged for the 2000-2003 Cadillac DeVille, 2000-2002 Cadillac Eldorado, 2000-2003 Cadillac Seville, and 2001-2003 Oldsmobile Aurora. See the Buyer's Guide tab for engine specifics.

What's included in the kit?

Complete kit coverage supplies the boots, springs, and insulators needed for full-cylinder replacement, making it suitable for tune-ups and preventative maintenance.

What are signs a coil boot may need replacing?

Boots can degrade from heat, vibration, or chemical exposure, which may lead to arc-through, misfires, or hard starting. Diagnose the cause before replacing to confirm the boot is at fault.

What material are the boots made from?

Each boot is constructed from high-temp silicone and other reinforced high-temperature materials engineered to resist oil, fuel, and under-hood heat.

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