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Your cart is empty.The Edelbrock Four-Hole Square-Bore to Spread-Bore Carburetor Adapter allows proper installation of carburetor to manifold. It mounts the Edelbrock square-bore carburetors to stock Quadra jet and Thermo-Quad manifolds. It is designed to replace the original equipment unit. It allows the use of almost any carburetor on almost any intake, saving the hassle and expense of purchasing all new components when changing carburetors or intakes.
Fidel Fausto
2025-09-02 11:32:57
Perfect fit for the Chevy big block to Holley efi unitGood clearance all around, seals up good tooEasy to installGreat price
P. M. Schwartz
2025-08-29 13:54:04
It fit my factory GM QuadraJet intake to allow me to install an Edelbrock 1405 600cfm carb. All gaskets and mounting hardware was included. It was drilled and tapped for a vacuum hook up but the hole was not drilled all the way through, so it would not be useful. Not sure if Edelbrock expects you to finish drilling the hole, if you need this port available. As it was, I used the vacuum port on the back of the Edelbrock carb to hook my power brakes up, just like the original QuadraJet. Ideally I will change manifolds to a correct squarebore style but this works great as an alternative if you do not want to change out manifolds.
Thomas Creech
2025-08-26 15:40:17
Quality part that fits like it should
Christopher Ryan
2025-07-25 13:40:19
Great fit and finish. These guys know what they're doing. This worked perfect adapting my factory original quadra-jet to an electric choke edelbrock without any permanent modifications. This will allow me to swap back to the Q-jet at my leisure once it's rebuilt and upgraded to electric choke from the heat-riser tubes that rotted out. The gaskets sealed well, but if you're planning to install this exactly as I did, you'll want to pair it up with the ICT Billet heat riser choke blockoff plate, and possibly an EGR delete blockoff plate.
Angelo M.
2025-07-17 14:48:47
Works perfectly as an adapter from square bore carb/throttle body to spread bore intake. I used the adapter to install an FiTech Go EFI 4 throttle body to my factory Pontiac four barrel 1972 intake manifold. Everything lined up perfectly except for the included spread bore gasket. The primary holes were not drilled in the correct position and would have interfered with the air flow. I replaced it with a .You can see the results by googling "mods and rods tv FiTech".Update: This adapter served me well, but last fall I broke down and modified my factory intake so I could bolt my throttle body directly to the factory intake. I only did this so my shaker on my trans am is set at the correct height. This adapter would have stayed if I didn't have clearance issues.
Keith Rogers
2025-07-01 15:16:07
I like it because it works great with the carburetor Perfectly. I don't have a video .
Gearhead
2025-05-18 15:35:52
Fast and speedy delivery, worth every penny
Noah
2025-02-24 11:40:05
It's an adaptive spacer.... Not too much to say other than it does exactly what is intended. It fit well, came with all the hardware needed and arrived in a timely manner!My particular use was for a 1967 Oldsmobile Cutlass 442, 400 big block (tall deck) using an Edelbrock Torker intake and using an 850 Carb with a brand name starting with an "H".... My review will get kicked if I include another brand name.
jean marc
2025-02-15 15:40:18
Belle finition et machinage parfait
Guillermo Tovar
2025-01-25 10:41:27
Para carburadores Edelbrock performance y AVS es quizás una de las mejores opciones la elevación no es tan pronunciada, lo que evite hacer cortes al cofre. Recomiendo su uso con la base aislante de calor Edelbrock. También recomiendo tener cuidado con el torque de las tuercas, ya que se barren los tornillos con mucha facilidad
Josef
2024-12-23 18:17:42
Dieser Adapter ist die einzige kostengünstige Möglichkeit, wenn man einen Squarebore-Vergaser ohne Wechsel der Ansaugspinne (~500 Euronen) auf einen GM-Bigblock setzen will. Da der Adapter nur 19mm dick ist, gehen die Ansaugwege für die Primärsysteme ziemlich stark "um die Ecke". Ein Blick auf das Foto 1 der Dichtungen zeigt, wo der Hase im Pfeffer liegt. Im Adapter sind dann noch scharfe Kanten, welche die Strömung auch nicht gerade optimieren ... aber hier kann man ja mit Dremel , Fräser und Schleifpapier nacharbeiten. Aber ich denke, auch der Flansch an der Spinne muss noch angepasst werden, um eine bessere Strömung zu erreichen - die Stege zwischen Primär- und Sekundärsystemen können weg (Foto 3, Schraffur) ... und dann noch mal die Primärwege im Adapter erweitern und anpassen, dann kann der Motor besser atmen.Bevor jetzt kluge Kommentare kommen - der Motor wurde gebraucht mit einem "offenen" Adapter ohne Kanäle (#2691 oder 2692) gekauft - damit läuft er zwar halbwegs brauchbar, aber wenn die Strömung zur Hälfte durch die Unterdruckverteilung in der Spinne blockiert ist (Foto 2, nicht ganz größenexakt), wird Leistung verschenkt ... und die will ich mir holen, ohne ein zu großes Loch in der Kasse zu haben.
Hector d.
2024-12-09 16:11:14
Perfecto
the_shining_85
2024-11-22 18:28:58
Used this on my Ford cobra jet with the factory quadajet intake manifold. I used it with my holley 850 spread bore Carburetor. The quality is excellent and works very well. Super satisfied.
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