The ThunderSpark Distributor Cap (part number 925-1005) is a direct-fit replacement for 1974-1990 Buick, Cadillac, Checker, and Chevrolet vehicles with 5.7L, 4.3L, and 6.6L engines. Walker Products Distributor Caps are OE Replacement components that restore accurate spark distribution and reliable ignition system performance.
Features:
- Heat-Resistant Materials:Â Constructed with high-dielectric compounds to withstand high voltage, thermal cycling, and engine vibration.
- Directs High-Voltage Spark:Â Routes ignition coil output to the correct cylinder to ensure proper firing order and engine performance.
- Exact OE Fit: Designed for 100% fit with original distributor housings—ensuring a secure seal and reliable contact points.
- Restores Ignition Timing & Spark Delivery:Â Helps resolve misfires, hard starts, and poor performance caused by cracked or worn caps.
- OE Replacement Quality:Â Built to meet OE specs for terminal alignment, dielectric strength, and conductive path precision.
Specifications:
Fits: 1974-1990 Buick, Cadillac, Checker, Chevrolet, and GMC models including Apollo, Century, Electra, Estate Wagon, LeSabre, Regal, Riviera, Skylark and more — 5.7L, 4.3L, and 6.6L engines.
Confirm the year, make, model, and engine against your vehicle before ordering. Full application data is shown in the fitment lookup on this page.
Interchanges With: Forecast 4212, Chrysler 19110931, Chrysler 52352670, Carquest 51-1571, AP Exhaust D-336, Echlin RR-171, Filko DR-188, General Motors 1118443 and 26 more
WARNING: This product can expose you to chemicals, including lead, which is known to the State of California to cause cancer or birth defects or other reproductive harm.
