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 4 - Jul 9

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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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Effective product.
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Reviewed in the United States on May 31, 2026
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Classy1!
Louisville, US
★★★★★ 5
THIS STUFF WORKS!!!!!!
First of all - RUN, DON’T Walk & get this. IT WORKS!!! I kid you NOT, that I can literally feel sprouts of hair growing out of the roots of my head! After washing my hair And drying it, I part my hair into several sections and gently massage it into my scalp. After at least a day or so, I can feel the tickle in my scalp, it feels like grass slowly growing. I have plenty of hair, but I would love to actually see this product used on someone who doesn’t have hair like me. I am using the product because of a thinning spot that I have from a sew-in that I have had multiple times, and getting it parted in the same area for over a period of time. You can Not beat this product, especially for the price.
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Reviewed in the United States on July 18, 2025
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Southern Girl
Houston, US
★★★★★ 1
Don't not purchase!!!!
Color: A
This is product has over ingredients, its made in China and the shelf life is 3 years! No naturall product has a shelf life of a 3 years or any storing instructions. Just an FYI when buying any product, the ingredient that's the most in the product is the first on this list of ingredients WATER is the first, Batana Oil is second to the last. the packaging say 100%, 100% what? Its truely not Batana Oil. I am sending this back ASAP and working on my own mix for my hair growth. I am dealing with scared alopecia and have been searching for things to help with my hair growth. I am tried of companies thinking they will take my money. I was not able to see the ingredients until I recieved the package, which is not a terriable way to sell a product.
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Reviewed in the United States on October 5, 2024
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Doyleetia Young
Lexington, US
★★★★★ 5
We love this stuff
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My baby had an infection in his hair that he got once he started daycare. We tried everything to kill the fungus. It got so bad I had to take him to the doctor and they finally gave him some antibiotics and medicated shampoo. His head was so sore and tinder he didn’t want anyone to touch his head. So imagine trying to wash his hair everyday. The shampoo killed the fugus and took his hair out where it was. I purchased this product. IT REALLY WORKS!!!!!! We’ve been using it a few weeks and we definitely see a difference. P.S I went and purchased the whole set
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Reviewed in the United States on April 9, 2025
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kc
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I like it
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I'm unsure how it affects hair growth since I've only had one jar. It does leave hair moisturizedand soft. It has a really nice scent.
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