Walker Products 900-P2041-4 ThunderCore-Ultra Spark Plug Coil Boot Kit

The Walker Products 900-P2041-4 ThunderCore-Ultra Coil Boot Kit is a premium OE replacement ignition component designed to restore reliable spark delivery and high-voltage insulation in coil-on-plug (COP) and coil-near-plug (CNP) ignition systems. Precision manufactured in an ISO 9001/IATF16949 certified facility, this kit is engineered to meet or exceed all original equipment manufacturer (OEM) specifications and test requirements.

Key Features:

• OE-matched fit, form, and function — engineered to replicate OEM dimensions and terminal fitment for a direct drop-in replacement
• Stainless steel springs with integrated resistors — suppress radio frequency interference (RFI) for cleaner ignition signals
• Maximum voltage delivery — optimized design ensures full spark energy reaches the plug without loss through boot degradation
• Weatherproof seals — minimize moisture and contaminant intrusion that can cause misfires or hard starting
• Premium high-temperature materials — constructed to withstand extreme engine bay heat, vibration, and chemical exposure
• Includes dielectric grease — for proper installation and long-term corrosion protection at the coil-to-plug interface
• ISO 9001/IATF16949 certified manufacturing — backed by Walker's in-house engineering, product management, and quality control

Over time, coil boots degrade due to heat cycles, vibration, and chemical exposure, leading to arc-through, engine misfires, rough idle, or hard starting. The Walker Products ThunderCore-Ultra Coil Boot Kit provides a cost-effective solution to restore ignition system performance without replacing the entire coil assembly. Each kit includes all necessary components for a complete service.