Optispark Distributor Vacuum Harness – LT1/LT4 (1994–1997 B/D/F-Body)
Optispark Distributor Vacuum Harness – LT1/LT4 (1994–1997 B/D/F-Body)
Optispark Distributor Vacuum Harness – LT1/LT4 (1994–1997 B/D/F-Body)
Optispark Distributor Vacuum Harness – LT1/LT4 (1994–1997 B/D/F-Body)
Petris Enterprises

Optispark Distributor Vacuum Harness – LT1/LT4 (1994–1997 B/D/F-Body)

Regular price $ 99.58

Vacuum harness for LT1 and LT4 engines equipped with a ventilated Optispark distributor, found in B-, D-, and F-body vehicles including the Camaro, Firebird, Impala SS, Fleetwood, Caprice, and Roadmaster. Replaces discontinued GM part number 12555323.

⚠️ Important: This harness is not compatible with Corvettes as the Corvette version is shorter.
Click here for the Corvette-specific harness.

Upgrade your worn or heat-damaged vacuum harness assembly with our high-quality replacement. Our assembly includes the correct micron filter, check valve, fitting, and hose to suit GM ventilated Optispark distributors.

Key Features:

  • Optimized Vacuum Flow: Our harness assembly is designed with the correct vacuum orifice, ensuring optimal vacuum flow without risking distributor damage.
  • High-Quality Construction: While not original equipment from the manufacturer, our harness is crafted to closely match original specifications and appearance. We use high-quality vacuum hoses, fittings, and valves for durability and reliable performance.

Please note: Minor variations may occur due to component availability.

Installation Tips:

Attaching the vacuum hose to the distributor cap can be challenging when the ambient temperature is below 85°F. To ease installation, we recommend using a non-silicone-based lubricant, such as WD-40 or CRC.


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