Free US Shipping·Ships in 24 Hours from CA & GA·30-Day Free Returns·1-Year Warranty
- Free shipping, ships within 24 hours from our California & Georgia warehouses
- 30-day free returns, we pay return shipping
- 1-year warranty on casting defects
- Made in our own factory, leak-tested and inspected before it ships
7551 Air-Gap Dual Plane Intake for Oldsmobile 400, 425 & 455
An Air-Gap, dual-plane intake manifold for Oldsmobile big-block V8s with stock-configuration heads. The open space under the runners keeps them away from lifter-valley heat, so the air/fuel charge stays cooler and denser. Power band: 1,500 to 6,500 RPM, for a strong street or street/strip Olds.
- Air-Gap dual-plane design, 5.54 in. height
- 4150-style square-bore 4-barrel carburetor flange
- Operating range: 1,500–6,500 RPM
- Standard oil fill, plus accessory bosses for the early air-conditioning support bracket
Before you order:
- For standard-deck Oldsmobile big blocks with stock-configuration heads.
- For an Olds small block (307, 330, 350, 403), see the 7111.
- Check hood clearance.
Engine Fitment
- Oldsmobile 400, 425 and 455, including the 1968–1976 455 (7.5L)
Full specifications are in the Specifications tab.
What's Included
- 1 × intake manifold
- Additional parts as shown in the product photos
Why Haytalras
- Built in our own factory. We cast and CNC-machine our intake manifolds in-house. The same factory has produced intake manifolds for Holley, TSP and Professional Products.
- Checked before it ships. Every manifold goes through air-tightness, dimensional and visual inspection.
- Ships from the US. Free shipping from our California and Georgia warehouses, out the door within 24 hours, usually delivered in 3–7 days.
- Backed by us. 30-day free returns and a 1-year warranty on casting defects.
Frequently Asked Questions
7551 or 4150?
The 7551 dual plane is for street and street/strip use from 1,500 RPM. The 4150 single plane is for high-RPM racing (4,500–7,500 RPM).
Not sure it fits?
Email haytalras@gmail.com with your vehicle and engine and we'll confirm before you order.
Download the official Haytalras installation instructions for this 7551 part. We recommend reading them and doing a test fit before final assembly.
View / Download Installation PDF
Questions during install? Email haytalras@gmail.com with your engine and part number and we'll help.
Shipping
- Orders ship within 24 hours on business days from our US warehouses in Ontario, California and Bloomingdale, Georgia.
- Most US orders arrive within 3–7 days after shipping. A tracking number is emailed as soon as your package leaves the warehouse.
- Need a part urgently? Email us and we'll check stock at the closest warehouse.
Returns
- Eligible items can be returned free of charge within 30 days of delivery.
- Please contact us at haytalras@gmail.com before sending anything back so we can set up your return.
- We recommend a test fit as soon as your package arrives, before final assembly.
Full details: Returns & Warranty
Related Products
More Oldsmobile parts from Haytalras.
-11%
Haytalras 7111 Oldsmobile Small Block High-Rise Dual Plane Square/Spread Bore Intake Manifold 307 330 350 403
7111 High-Rise Dual Plane Intake for Oldsmobile 307, 330, 350 & 403 A high-rise, dual-plane intake manifold for Oldsmobile small-block V8s. Larger plenum and runners match a modified engine with...
-11%
$249.99
$279.99
Haytalras 4150 Oldsmobile V8 Low-Rise Single Plane 4150 Square Bore Intake Manifold 400 425 455
4150 Single Plane Intake for Oldsmobile 400, 425 & 455 A single-plane intake manifold for Oldsmobile big-block V8s: the 400, 425 and 455. Built for high-RPM performance, with a power...
$169.99
