Restore reliable high-voltage insulation between the ignition coil and spark plug with the ThunderCore PRO ThunderSpark Coil Boot Kit 900-P2032-4. This OE-replacement kit is a direct-fit replacement across a wide range of GM applications, including the 1987 Oldsmobile Calais, 1988-1998 Buick Skylark, 1988-2001 Pontiac Grand Am, 1990-1994 Chevrolet Beretta, 1992-1998 Oldsmobile Achieva, 1995-2002 Chevrolet Cavalier and Pontiac Sunfire, 1997-1999 Chevrolet Malibu, and 1999-2001 Oldsmobile Alero — see the "Vehicles it fits" section for the full list of covered vehicles and engines.
- 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 — suited to tune-ups and preventative maintenance.
- Heat & chemical resistant: Built from high-temperature silicone and reinforced materials to resist oil, fuel, and under-hood heat.
- OE-replacement fit: Engineered to match OE dielectric strength, boot length, and connector geometry for coil-on-plug (COP) and coil-near-plug (CNP) systems.
In coil-on-plug and coil-near-plug ignition systems, the coil boot forms the insulative path that carries high voltage from the ignition coil to the spark plug. Heat, vibration, and chemical exposure can degrade a boot over time, leading to arc-through, misfires, or hard starting. If a failed coil boot is the cause of these symptoms, this kit replaces the boots along with their springs and insulators for a full ignition service.
Interchange: 114025 · CPBK100 · 4444
Frequently Asked Questions
What does this coil boot kit do?
In coil-on-plug and coil-near-plug systems, the coil boot forms the insulative path that carries high voltage from the ignition coil to the spark plug, keeping the spark isolated and the connection secure.
What's included in the kit?
The kit includes the boots, springs, and insulators needed for full-cylinder replacement, making it suited to ignition tune-ups or preventative maintenance.
What are the signs a coil boot may need replacing?
Boots can degrade from heat, vibration, or chemical exposure, which may show up as arc-through, misfires, or hard starting. Diagnose the cause before replacing.
Will it fit my vehicle?
It's cataloged for a range of GM models such as the Buick Skylark, Pontiac Grand Am, Chevrolet Cavalier, and Oldsmobile Alero. Check the "Vehicles it fits" section to confirm your exact year, make, and model.
How does it compare to the original boots?
It's engineered to match OE dielectric strength, boot length, and connector geometry for coil-on-plug and coil-near-plug ignition systems, using high-temperature silicone and reinforced materials.
