Restore spark isolation and secure coil-to-plug contact with the ThunderCore PRO Coil Boot Kit (P/N 900-P2029-10). This ThunderSpark OE-replacement kit serves coil-on-plug (COP) and coil-near-plug (CNP) ignition systems across a wide range of Ford applications, including the 1997-1998 Ford E-350 Econoline, 1997-2002 Ford E-350 Econoline Club Wagon, 2003 and 2005 Ford E-350 Club Wagon, 2004-2014 Ford E-350 Super Duty, 2000-2002 Ford E-450 Econoline Super Duty, 2003-2014 Ford E-450 Super Duty, 2002 Ford E-550 Econoline Super Duty, 2003 Ford E-550 Super Duty, 1997-1999 Ford Econoline Super Duty, 2000-2005 Ford Excursion, 1999-2004 Ford F-250 Super Duty, 1999 and 2001-2004 Ford F-350 Super Duty, 1998-1999 and 2001-2004 Ford F-450 Super Duty, 1999-2004 Ford F-53 Motorhome Chassis, and 1999 and 2001-2004 Ford F-550 Super Duty. See the Buyer's Guide tab for the full list and engine details.
- Complete Kit Coverage: supplies the boots, springs, and insulators needed for full-cylinder replacement—well suited to ignition tune-ups and preventative maintenance.
- Heat & Chemical Resistant: built from high-temperature 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 guard against voltage loss.
- OE Replacement Quality: engineered to match OE dielectric strength, boot length, and connector geometry.
In COP and CNP setups, the coil boot is the insulative path between the ignition coil and the spark plug. Heat, vibration, or chemical exposure can degrade a boot over time, which may lead to arc-through, misfires, or hard starting. If failed boots are the cause of those symptoms, this kit replaces them to help restore reliable high-voltage insulation.
Interchange: 121001
