Intake & Fuel Systems
Dual Carb/Air Filter w/ Throttle Linkage!
Offenhauser is the only manufacturer of Dual Quad intake manifolds for Oldsmobiles. Accepts two four barrel carburetors. Ideal for street rods and an impressive engine compartment. The low profile manifold allows this setup to fit under your stock hood. Dual air filters allow easy access to your individual carburetors. Call us today to order yours!
This all aluminum intake manifold for the 400-425-455 Olds engines has an open plenum large runner and is designed for high performance needs. Carburetor base fits a square bore Holley carburetor flange. Effective power range from 1200 to 7500 RPM. Comes port matched to Edelbrock and Mondello aluminum cylinder heads.
This all aluminum intake manifold for the Toronado engine is depressed down to allow for engine hood clearance and fits all Oldsmobile 400-425-455 engines. Also used for GMC Motorhomes with Olds big block engines.
This all aluminum intake manifold for the 400-425-455 has an open plenum large runner and is recommended for competition use only. The improvements to this manifold include the use of 4 paravanes at the bottom of the plenum to direct the gas/air mixture through the runners in an even distribution pattern with minimum turbulence factor. Can be used with stock or HEI distributors (some minor modification may be required).
Dual plane aluminum intake manifold for 400-425-455 Oldsmobile street and high performance applications operating in the idle-5500 rpm range. Our VT-581 Aluminum Valley Tray and IG-505 Intake Gaskets are recommended for this manifold. For marine and off-road applications, use HR-351 S/S Heat Riser Block Off Plates. Will work with HEI distributors. Will not fit Toronado or 4-4-2 Ram-Air scoop without hood modifications. Center divider can be cut for an additional charge. Use #2732 Carb Plate for square flange Holley Carburetors.
Designed for the ultimate Pro-Street/Drag Race/Marine applications. This new Victor Manifold bolts right on the Edelbrock Performer RPM aluminum cylinder heads or stock cast iron heads for the 400-455 Oldsmobile engines. Uses a standard flange for an 850 cfm carburetor. We can modify this manifold to fit under stock hoods. (Will not fit without modification.)
Designed for the ultimate Pro-Street/Drag Race/Marine applications. This new Victor Manifold bolts right on the Edelbrock Performer RPM aluminum cylinder heads or stock cast iron heads for the 400-455 Oldsmobile engines. Uses an enlarged flange for a 4500 series carburetor. We can modify this manifold to fit under stock hoods. (Will not fit without modification.)
Designed for the ultimate Pro-Street/Drag Race/Marine applications. This new Victor Manifold bolts right on the Edelbrock Performer RPM aluminum cylinder heads or stock cast iron heads for the 330-350-403 Oldsmobile engines. We can modify this manifold to fit under stock hoods. (Will not fit without modification.)
This dual plane, 180-degree plenum designed aluminum intake manifold is an excellent choice for the 330-350-403 Oldsmobile engines. It can be used on the 307 with #5A heads if cylinder heads are port matched. Effective power range from idle-5500 rpm. (This manifold will not fit the 260 V-8.) It accepts Quadrajet or standard Holley carburetors. Will work with HEI distributor. Use IG-495 Intake Manifold Gaskets for best results.
Same as 3711 except it is ‘non-EGR’. This dual plane, 180-degree plenum designed aluminum intake manifold is an excellent choice for the 330-350-403 Oldsmobile engines. It can be used on the 307 with #5A heads if cylinder heads are port matched. Effective power range from idle-5500 rpm. (This manifold will not fit the 260 V-8.) It accepts Quadrajet or standard Holley carburetors. Will work with HEI distributor. Use IG-495 Intake Manifold Gaskets for best results.
This high rise, dual plane, 180-degree plenum designed aluminum intake manifold accepts Quadrajet or standard Holley carburetors and is another excellent choice for the 330-350-403 Oldsmobile engines. (Will not fit the 260 V8.) Effective power range from 1500 to 6500 RPM. Port flange has extra material above the runner to allow for use with Big Block Olds heads. It can be used on the 307 with #5A cylinder heads if cylinder heads are port matched. VT-581 Aluminum Valley Tray and IG-495 Intake Gaskets are highly recommended for this manifold. Use #2732 Carb Plate for square flange Holley Carburetors.
This manifold will fit all Olds big block engines. Can run EGR and hot air chokes. Quadrajet carburetors are recommended for this manifold. Porting options are available. For best results use our VT-581 Valley Tray and IG-505 Intake Manifold gaskets. Use our HR-351 Heat Riser Block Plates when using electric choke carburetors for cooler air and better performance.
Specifically designed for Big Block Olds engines. This aluminum intake manifold has an individual runner design featuring modular twin port castings. Port surfaces are not machined, and bolt holes are not drilled. Must be custom fit to your block.
Make sure you ask about our polishing service. To order your manifold ‘Polished’ click on the BUY button. Allow four weeks for delivery.
Fits all Olds engines, small and big block. Our valley tray is designed to keep hot oil off the bottom of the intake manifold, allowing the manifold to stay much cooler for efficient performance. Will fit all stock cast iron and aluminum manifolds (except Toronado).(Small blocks must be drilled and tapped to accept this valley tray. Will only fit small blocks with Edelbrock 7111 Intake Manifold.) Reusable.
These stainless steel plates easily block off the heat riser passages on your stock cylinder heads. Indentation goes down into the head, attach with a small amount of high heat tolerant silicone then place intake gasket on top. Reusable.
Mondello Pro-Street Dominator Small Block Manifold Carburetor Assembly for 330-403 applications. Joe collaborated with Offenhauser to produce a 4500 manifold/750 carburetor assembly for maximum small block performance.