Restore clean spark insulation and secure coil-to-plug contact with the ThunderCore PRO ThunderSpark Coil Boot Kit 900-P2031-6. This OE-replacement kit fits a wide Chrysler, Dodge, and Plymouth lineup, including the 2005-2006 Chrysler 300, 1998-2004 Chrysler 300M, 2002-2003 Chrysler Cirrus, 1998-2004 Chrysler Concorde, 2001-2006 Chrysler Sebring, 2005-2006 Dodge Magnum, 2001-2005 Dodge Stratus, and 1999-2001 Plymouth Prowler — see the Buyer's Guide tab for the full list of covered applications.
In coil-on-plug (COP) or coil-near-plug (CNP) systems, the coil boot forms the insulative path between the ignition coil and the spark plug. Heat, vibration, and chemical exposure can degrade the boot over time, which may lead to arc-through, misfires, or hard starting. If a worn or cracked boot is the cause, this kit replaces it to help restore proper high-voltage isolation.
- Restores Ignition Insulation: Replaces worn or cracked boots to help maintain spark isolation and limit voltage loss.
- Complete Kit Coverage: Includes the boots, springs, and insulators needed for full-cylinder service — suited to tune-ups and repairs.
- OE Replacement Quality: Engineered to match OE dielectric strength, boot length, and connector geometry.
- Heat & Chemical Resistant: Built from high-temperature silicone and reinforced materials to resist oil, fuel, and under-hood heat.
Interchange: 136021 · CPBK300 · 940S
