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#425300137
Holley 300-137 Mid-Rise EFI Intake Manifold
- Features an optimized runner layout and constant cross sectional area
- The minimum carb flange height will fit in vehicles with minimum hood modifications
- Has a cast aluminum construction with a natural finish with a weight of just 11.5 lbs
$441.95
/each
In Stock
$491.95
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Product Summary
EFI Fuel System Type, Multi-port Injection Style
- Features an optimized runner layout and constant cross sectional area
- The minimum carb flange height will fit in vehicles with minimum hood modifications
- Has a cast aluminum construction with a natural finish with a weight of just 11.5 lbs
- It is a great manifold for centrifugal blower, turbocharged or NOS power adder applications
- Manifold does not work with factory fuel rails and requires the use of Holley Fuel Rail Kit P/N 534-219
Rebates Available
See rebate detailsKey Specs
| MFG. Part # | 300-137 |
| Brand | Holley |
| Intake Manifold Type | Dual Plane |
| RPM Range | 2,500-7,000 |
| Material Type | Aluminum |
Need To Know
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Return PolicyHolley 300-137 Details
Holley 300-137 Details
Single Plane Mid-Rise EFI LS Intake Manifold. All GM LS Gen III or IV engines equipped with LS1/LS2/LS6 style cathedral port cylinder heads.
- Kit does not work with factory fuel rails and requires the use of Holley Fuel Rail Kit P/N 534-219
- 2500-7000 RPM power band
- 4150 Square bore flange
- Optimized runner layout and constant cross sectional area - broad torque curve, best vehicle performance from 2500-7000 RPM
- Minimum carb flange height - fit in vehicles with minimum hood modifications
- Cast aluminum construction - great manifold for centrifugal blower, turbocharged or NOS power adder applications
- Efficient casting design - lightweight, consistent wall thicknesses, improved casting quality
- Weight - 11.5 lbs.
- Height (front) - 5.417" to the lifter valley cover flange at the engine block front flange
- Port size - 2.50" height x 1.15" wide
- Includes Viton® O-ring intake to cylinder head gaskets - Viton® is a registered trademark of DuPont Performance Elastomers
Charts
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Holley Fuel Up Spring Savings Event 2026

Save 10% instantly on select products across the Holley family of performance brands during the annual Holley Fuel Up Spring Savings Event 2026. Instant rebate period runs from March 30, 2026 through April 19, 2026.
Guides & Documents
CARB Warning
For race/ off road use or for use on pre-1966 vehicles.
CARB Warning
For race/ off road use or for use on pre-1966 vehicles.
Holley 300-137 Specifications
Holley 300-137 Specifications
| KEY SPECS | |
|---|---|
| MFG. Part # | 300-137 |
| Brand | Holley |
| Intake Manifold Type | Dual Plane |
| RPM Range | 2,500-7,000 |
| Material Type | Aluminum |
| GENERAL | |
| Fuel System Type | EFI |
| Injection Style | Multi-port |
| Finish | Natural |
| EGR | No |
| Cylinder Head Configuration | Cathedral Port |
| Intake Section Included | Complete |
| Plenum Material | Aluminum |
| Plenum Finish | Natural |
| Throttle Body Included | No |
| Injectors Included | No |
| Aftermarket Fuel Rail Required | Yes |
| Fuel Rails Included | No |
| Overall Height | 5.42" |
| Runners Included | No |
| Runners Removable | No |
| Supplemental Bosses Cast-In | No |
| Supplemental Bosses Machined | No |
| Sold in Quantity | Each |
| GTIN Code | 090127687758 |
Ratings & Reviews
4.7
3 Reviews
Customers appreciate the product for its high-quality and good fit. Its classic, retro aesthetic appeals to users, especially when paired with the Holley intake, throttle body, and air cleaner. It enhances builds, including for a 32 roadster and a 5.3 turbo build for an '84 Caprice. Users recommend it for retaining port EFI while also enhancing the look of their builds. The product is valued for its practicality, quality material, and reliable performance.
Ratings & Reviews
4.7
3 Reviews
Customers appreciate the product for its high-quality and good fit. Its classic, retro aesthetic appeals to users, especially when paired with the Holley intake, throttle body, and air cleaner. It enhances builds, including for a 32 roadster and a 5.3 turbo build for an '84 Caprice. Users recommend it for retaining port EFI while also enhancing the look of their builds. The product is valued for its practicality, quality material, and reliable performance.
4.7
3 reviews
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Good price and good quality
5.0
7 years ago
Brad
Kansas City
Verified
Good fit
Would Recommend
Has the exact look I was hoping for.
5.0
9 years ago
Gearman
Marion Iowa
Verified
As this is being installed on a 32 roadster: the mix of a classic retro look plus the ability to retain port EFI were important to this build. The combination of the Holley intake, the throttle body and air cleaner together made this possible. As I am a stickler for hardware fastener appearance/overall match, most items I purchase always need something to match the theme...
Would Recommend
good fit
4.0
9 years ago
dgcycle
Kingston PA
Verified
Using on a 5.3 turbo build for a 84 caprice
Would Recommend
Showing 3 of 3 reviews
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