The ThunderSpark Distributor Cap (part number 925-1006) is a direct-fit replacement for 1977-1990 Buick, Cadillac, Checker, and Chevrolet vehicles with 3.8L, 3.2L, and 3.0L engines. Walker Products Distributor Caps are OE Replacement components that restore accurate spark distribution and reliable ignition system performance.
Features:
- Exact OE Fit: Designed for 100% fit with original distributor housings—ensuring a secure seal and reliable contact points.
- OE Replacement Quality:Â Built to meet OE specs for terminal alignment, dielectric strength, and conductive path precision.
- Directs High-Voltage Spark:Â Routes ignition coil output to the correct cylinder to ensure proper firing order and engine performance.
- Restores Ignition Timing & Spark Delivery:Â Helps resolve misfires, hard starts, and poor performance caused by cracked or worn caps.
- Heat-Resistant Materials:Â Constructed with high-dielectric compounds to withstand high voltage, thermal cycling, and engine vibration.
Specifications:
Fits: 1977-1990 Buick, Cadillac, Checker, Chevrolet, and GMC models including Century, Electra, LeSabre, Regal, Riviera, Skyhawk, Skylark, Somerset and more — 3.8L, 3.2L, and 3.0L 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: Carquest 51-1575, AP Exhaust D-335, Echlin RR-203, Filko DR-186, General Motors 1894979, General Motors 1986627, General Motors 19110930, General Motors 89058245 and 15 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.
