Optispark Distributor Vacuum Harness – LT1/LT4 (1993–1997 B/D/F-Body)
SKU: 91656772979

Optispark Distributor Vacuum Harness – LT1/LT4 (1993–1997 B/D/F-Body)

Sale price$89.99 Regular price$99.99
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Ships within 48 hours · Estimated delivery Jul 9 - Jul 14

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Description

Optispark Distributor Vacuum Harness – LT1/LT4 (1993–1997 B/D/F-Body)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. Click here for the Corvette specific harness. Upgrade your worn or heat damaged vacuum harness assembly with our high quality replacement. Our

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.
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.  The check valve and filter match the original micron rating and are constructed from Viton material for enhanced durability. Additionally, the check valve features an integral orifice to help prevent cap implosion.

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 and fittings 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.

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 91656772979

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Stephen Stone
Whiting, US
★★★★★ 5
Love
Size: 15.7", Color: Black
I really like this. They're built well and looks beautiful. Very happy.😊
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Reviewed in the United States on March 18, 2026
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Amazon Customer
Birmingham, US
★★★★★ 5
Amazing
Size: 15.7", Color: Rustic Brown, Size: 15.7", Color: Rustic Brown
Easy to install and sturdy
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Reviewed in the United States on December 27, 2025
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Audretta
Belleville, US
★★★★★ 5
Perfect.
Size: 15.7", Color: Black
Exactly as pictured.
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Reviewed in the United States on December 31, 2025
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Mickey Ryder
Louisville, US
★★★★★ 5
Awesome!
Color: White and Black, Size: 15.7"
Nice sturdy shelves. Looks awesome on my walls.
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Reviewed in the United States on May 19, 2026
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norton
Massapequa, US
★★★★★ 5
Great for knick-knacks and toiletry items
Color: Dark Brown, Size: 15.7"
Perfect for the bathroom. I love that you can position the shelves in different arrangements. Sturdy enough for knick-knacks and toiletry items. Looks exactly as pictured.
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Reviewed in the United States on May 27, 2026

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