The ThunderSpark Distributor Cap (part number 925-1071) is a direct-fit replacement for 1994-2008 Chevrolet, GMC, Isuzu, and Oldsmobile vehicles with 4.3L engines. Walker Products Distributor Caps are OE Replacement components that restore accurate spark distribution and reliable ignition system performance.
Features:
- 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.
- OE Replacement Quality:Â Built to meet OE specs for terminal alignment, dielectric strength, and conductive path precision.
- Heat-Resistant Materials:Â Constructed with high-dielectric compounds to withstand high voltage, thermal cycling, and engine vibration.
- Restores Ignition Timing & Spark Delivery:Â Helps resolve misfires, hard starts, and poor performance caused by cracked or worn caps.
Specifications:
Fits: 1994-2008 Chevrolet, GMC, Isuzu, and Oldsmobile models including Astro, Blazer, C1500, Express 1500, Express 2500, K1500, P30, S10 and more — 4.3L 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 40006A, PRENCO 33-7044, Wells DR978, Delphi DC20009, SMP DR475, SMP DR475T, GMC 10452458, BWD C280 and 3 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.
