ThunderCore PRO Coil Boot Kit P/N:900-P2077-6

Restore reliable spark insulation with the ThunderCore PRO Coil Boot Kit 900-P2077-6 (also written 900P20776), an OE-replacement ignition service kit that drops in for the 1999-2001 Cadillac Catera and 2003-2004 Cadillac CTS. In coil-on-plug (COP) and coil-near-plug (CNP) systems, the coil boot forms the insulative path between the ignition coil and the spark plug; over time heat, vibration, and chemical exposure can degrade a boot, leading to arc-through, misfires, or hard starting. If a worn or cracked boot is the cause, this kit replaces it to restore proper spark isolation.

• OE Replacement Quality: engineered to match 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 reduce voltage loss.
• Complete Kit Coverage: includes the boots, springs, and insulators needed for full-cylinder service — ideal for ignition tune-ups or preventative maintenance.

Designed for compatibility with the factory ignition coils and spark plugs on the listed applications. See the Buyer's Guide tab for engine details.

Interchange: 116083