Holley 350/500 Carb to Weber Manifold Adapter Kit
We manufacture these billet aluminum carb adapters in house, to our specs. We use only the finest materials in our spacers to assure the quality you would expect from LC Engineering. These are CNC machined out of a solid piece of billet aluminum. These are not a one-size-fits-all adapter like some others on the market. Ours are designed to fit a specific carburetor and intake manifold to allow perfect fitment. Adapter is 3/8" thick.
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- Holley 350 to Weber Manifold
- Holley 500 to Weber Manifold
To open a printable PDF version of this instruction CLICK HERE
Since the Holley carburetor bores are so much larger than the manifold it is recommended to port match your manifold to our adapter for optimal performance. LC Engineering recommends pre installing the adapter up to your manifold to see where you will need to port match the manifold.
Kit Includes:
(1) Holley Carb. to Weber Manifold Adapter(4) M8-1.25 x 35mm Hex Bolt
(4) M8-1.25 Nylock Nut Small Patt - Zinc
(4) M8 Wave Washer - Zinc
(4) 5/16-18 x 3/4 Allen Bolt
(1) Holley Base Gasket
(1) 20R/22R Weber Pattern Base Gasket
Installation:
- Block off your EGR mount.(If it does not clear the Throttle Linkage you will need parts # 8010086 and # 1035087)
- Pre install the adapter onto your manifold (no gaskets). Inspect the manifold opening and port to match. Any port work should be done with the manifold off the engine. Make sure to clean the manifold thoroughly after porting. At this time cut the base gasket to accommodate to your new larger opening.
- Install the four M8x35mm Hex Bolts from the bottom of the adapter. The part number is engraved on top of the plate for reference.
- Lightly coat lower gasket with white lithium grease on both sides (to help seal better) and install onto your manifold. Set your new adapter on top of the gasket.
- Install adapter on intake manifold using the supplied allen bolts to attach adapter to manifold(Lock-tight can be used).
- Lightly coat carburetor gasket with white lithium grease on both sides. Install your carburetor onto the adapter and use wave washers and nuts to tighten down. (DO NOT EVER TIGHTEN, IT WILL DAMAGE THE CARB. BASE)
15 Reviews Hide Reviews Show Reviews
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Perfect fit!
This adapter is the perfect fit for the Offenhauser manifold to a Holley Sniper. The team at LCE are great to help out with any questions, don't hesitate to give them a call! Thanks LCE gang!
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Holley 350/500 to Weber manifold
Excellent exactly what I needed to finish my project thank you lce performance
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Holley 350 / 500 to Weber Manifold
A very well made product. The quick turn around and shipping was greatly appreciated!
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adapter for Holley car
great customer service helped me thru getting my item
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Holley adapter
Recently purchased this adapter to mount a holley sniper on my progressive intake. The quality and completeness of the kit was great and the price was very fair.
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Great product
I was sceptical because of the price great machining works perfectly love it.
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Benny Smith give 5 stars
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Carb Adapter
I have a 70's Corolla with a 3TC motor. I've been trying to upgrade to boosted fuel injection. I couldnt find anything that would adapt from a Weber carb to a Holley 2300. Well, except for LCE, they have custom parts that no one else has. I would highly recommend to anyone that builds custom rides. Thanks LCE!
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Nice product, great service
At first I thought the adapter seemed a little pricey. But once I received it, the quality of the product and machine work is excellent and it fit perfect. It is also very complete with quality hardware and gaskets. I would now describe it as a bargain. Best of all it showed up a day faster than promised. All together a great deal.