ThunderSpark Distributor Cap P/N:925-1017

Keep high-voltage spark reaching the right cylinder with the ThunderSpark Distributor Cap 925-1017 (also written 9251017), an OE-replacement cap for conventional distributor-based ignition systems. It's a direct-fit replacement across a wide Ford and Mercury lineup, including the 1981-1990 Ford Escort, 1985-1990 Ford Mustang, 1986-1991 Ford Taurus, 1984-1994 Ford Tempo, 1983-1988 Ford Thunderbird, 1984-1994 Mercury Topaz and 1985-1989 Merkur XR4Ti — see the Buyer's Guide tab for the full application and engine list.

• Directs High-Voltage Spark: Routes ignition-coil output through the rotor and internal terminals to the correct cylinder for the proper firing order.
• OE-Replacement Quality: Built to meet OE specs for terminal alignment, dielectric strength, and conductive-path precision.
• Heat-Resistant Materials: Constructed with high-dielectric compounds to withstand high voltage, thermal cycling, and engine vibration.
• Exact OE Fit: Designed to install into the original distributor housing and maintain secure contact with the rotor and ignition wires.

Over time a distributor cap can develop carbon tracking, cracks, or corroded terminals, which may lead to misfires, hard starting, and drivability issues. If a worn or cracked cap is the cause, replacing it with the 925-1017 restores the intended spark path for reliable ignition.