Renew the insulating link between the ignition coil and spark plug with the ThunderCore PRO ThunderSpark Coil Boot 900-P2029. It's an OE-replacement coil boot that drops in for a wide range of Ford, Lincoln, and Mercury applications, including the 1997-2008 Ford F-150, 1997-2008 Ford F-250, 2003-2014 Ford E-150, 1997-2004 Ford Expedition, 1998-2011 Ford Crown Victoria, 1998-2011 Mercury Grand Marquis, 1998-1999 Lincoln Navigator, and 1999-2003 Ford Mustang. See the Buyer's Guide tab for the full list of fitments.
In coil-on-plug (COP) and coil-near-plug (CNP) systems, the boot forms the insulative high-voltage path from the coil to the spark plug. Heat, vibration, and chemical exposure can break that insulation down over time — signs it may need replacing include arc-through, misfires, or hard starting. If a worn or cracked boot is the cause, this replaces it.
- Restores ignition insulation: replaces worn or cracked boots for proper spark isolation and to help limit voltage loss.
- Heat & chemical resistant: made from high-temperature silicone and reinforced materials to resist oil, fuel, and under-hood heat.
- OE-replacement quality: engineered to match OE dielectric strength, boot length, and connector geometry.
- COP/CNP fit: designed for factory ignition coils and spark plugs in coil-on-plug and coil-near-plug configurations.
Interchange: 671-0001 · 671-8110 · BOOT 1003 · CH-04 · CH-08 · 36-2017 · 36-2025 · 36-2025H
6710001 · 6718110 · BOOT1003 · CH04 · CH08 · 362017 · 362025 · 362025H · ICB1 · SPP39 · SPP39E · 970S
This part cross-references / interchanges with the following part numbers:
671-0001, 671-8110, ICB1, BOOT1003, BOOT 1003, CH-04, CH-08, 36-2017, 36-2025, 36-2025H, SPP39, SPP39E, 970S
