Upgrading the intake manifold on your 318 (5.2L) small-block Mopar can unlock significant horsepower and torque gains. We researched and compared seven of the most popular options on the market, evaluating manufacturer specifications, published flow data, and aggregated owner feedback to help you make an informed choice. Whether you’re building a street cruiser or a strip warrior, our guide covers single-plane, dual-plane, and EFI designs.
| Photo | Product | Score | Buy |
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Edelbrock Performer RPM 318 Best Overall Performance Dual-plane, 180° firing order, 650-800 cfm carburetor, fits 318/340/360 LA blocks |
9.2 | 🛒 Check Price |
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Weiand Action Plus 8121 Best Value Dual-plane, 180° firing order, 600-750 cfm carburetor, fits LA 318/340/360 |
8.7 | 🛒 Check Price |
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Edelbrock Victor Series 318 Best for High RPM Single-plane, 180° firing order, 750-850 cfm carburetor, for race applications |
8.4 | 🛒 Check Price |
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Holley Street Dominator 300-36 Versatile Street/Strip Dual-plane with single-plane characteristics, 650-800 cfm, fits LA 318 |
8.1 | 🛒 Check Price |
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Mopar Performance P4529202 Factory Upgrade Dual-plane, cast iron, for 318/340/360, direct replacement for stock |
7.8 | 🛒 Check Price |
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Professional Products Typhoon 318 Budget Pick Dual-plane, aluminum, 600-750 cfm, fits LA 318 |
7.3 | 🛒 Check Price |
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Weiand Team G 7540 Race Ready Single-plane, 180° firing order, 750-850 cfm, for high-performance race engines |
7.0 | 🛒 Check Price |
1. Edelbrock Performer RPM 318: Best Overall Performance
The Edelbrock Performer RPM is our top pick for the best all-around 318 intake manifold. Based on our research of flow bench data and owner feedback, this dual-plane manifold delivers a broad power band from idle to 5500 RPM, making it perfect for daily drivers and weekend cruisers. The satin aluminum finish is both durable and attractive, and installation is straightforward with no need for special gaskets or adapter plates. It supports carburetors in the 650-800 cfm range, which pairs well with a mild cam and headers.
However, this manifold is not designed for sustained high-RPM use above 6000 RPM, where a single-plane would outperform it. If you are building a dedicated race engine that spends most of its time above 5500 RPM, you should skip this pick. For 95% of street-driven 318s, the Performer RPM is the ideal balance of performance and drivability.
- Dual-plane design maximizes low-end torque and mid-range power for street-driven 318s
- Cast from A356 aluminum with a durable satin finish that resists corrosion
- Includes water crossover and provisions for stock accessories like alternator and A/C
Pros: Excellent throttle response from idle to 5500 RPM; Bolt-on fitment with no modifications required on most LA 318s
Cons: Not ideal for high-RPM racing builds over 6000 RPM
2. Weiand Action Plus 8121: Best Value
The Weiand Action Plus 8121 is a budget-friendly dual-plane intake that delivers noticeable gains over the factory cast-iron manifold. We compared published flow numbers and owner reviews, and it consistently provides a 10-15 HP increase in the mid-range with a matching cam and carb. The casting quality is good, though the finish is slightly rougher than Edelbrock’s. It includes provisions for EGR, making it emissions-legal in many areas.
Its main weakness is that it gives up a few peak horsepower compared to the Performer RPM above 5000 RPM. If you are chasing every last pony on a high-performance build, you may be better served by a more expensive dual-plane or a single-plane. But for a reliable street upgrade that won’t break the bank, the Action Plus is an excellent choice.
- Street-oriented dual-plane design with a power band from 1500-5500 RPM
- Cost-effective alternative to Edelbrock without sacrificing quality
- Includes provisions for EGR and stock thermostat housing
Pros: Great value for budget-conscious builders; Solid low-end torque improvement over stock
Cons: Slightly less top-end power than the Performer RPM
3. Edelbrock Victor Series 318: Best for High RPM
The Edelbrock Victor Series is a single-plane intake built for maximum top-end performance. Our research of race results and flow bench data shows it shines above 4500 RPM, making it ideal for circle track or drag strip use. The large plenum and short runners feed the cylinders efficiently at high RPM, but they also kill low-end torque. This manifold is not for daily drivers or stop-and-go traffic.
It is also more challenging to install and tune than a dual-plane. You will likely need a 750+ cfm carburetor, a high-stall torque converter, and a cam with at least 0.500″ lift to see benefits. If your 318 spends most of its time on the street under 4000 RPM, skip this pick. It is strictly for dedicated performance applications.
- Single-plane design optimizes airflow for high-RPM power above 4500 RPM
- Large plenum and short runners maximize top-end horsepower
- Designed for use with high-lift camshafts and race headers
Pros: Excellent peak power gains over dual-plane manifolds; Proven on track with 318 race engines
Cons: Sacrifices low-end torque and drivability on the street; Requires careful tuning and may need a high-stall converter
4. Holley Street Dominator 300-36: Versatile Street/Strip
The Holley Street Dominator 300-36 is a unique blend of dual-plane and single-plane features. It has a divided plenum but with a larger crossover that allows some pressure wave sharing, giving it a broader power band than a pure single-plane. Owner feedback indicates it performs well from 2000-6000 RPM, making it a decent choice for a street/strip 318. The price is competitive, though the casting quality is not as polished as Edelbrock’s.
Some users report that the manifold requires minor grinding to clear certain aftermarket valve covers or thermostat housings. If you want a hassle-free bolt-on, the Edelbrock Performer RPM is a safer bet. However, if you are willing to do a little fitting work, the Street Dominator offers good performance for the money.
- Dual-plane design with an open plenum for improved top-end flow
- Works well with both street and mild race cams
- Includes provisions for stock throttle linkage and kickdown
Pros: Good mid-range punch with decent top-end extension; Affordable price point for a performance upgrade
Cons: Fitment can be tight on some vehicles, may require minor grinding; Not as refined as Edelbrock offerings
5. Mopar Performance P4529202: Factory Upgrade
The Mopar Performance P4529202 is a factory-style cast iron intake designed for stock or mild 318s. It is a direct replacement for the original manifold, making it ideal for restorations or those who need to maintain emissions legality. The cast iron construction is extremely durable and helps warm the intake charge for better cold-weather drivability. However, it is heavy and offers only a modest flow improvement over the stock 318 manifold.
If you are after significant horsepower gains, this is not the right manifold. It is best suited for someone who wants a reliable, bolt-on replacement that maintains factory appearance and function. For performance enthusiasts, an aluminum aftermarket intake will provide much better power-to-weight ratio.
- Cast iron construction for extreme durability and heat retention
- Direct bolt-on for factory stock 318s with no modifications
- Retains EGR and all accessory mounting points
Pros: Virtually indestructible and OEM quality; Perfect for restorations and emissions-compliant builds
Cons: Heavy (around 40 lbs) and offers minimal performance gains; Outperformed by aluminum intakes in flow and weight
6. Professional Products Typhoon 318: Budget Pick
The Professional Products Typhoon is one of the most affordable aluminum intake manifolds for the 318. It is a dual-plane design that can provide a noticeable improvement over the stock cast iron unit. Our research of owner feedback shows that many buyers are satisfied with the performance gain for the price. However, there are reports of rough casting surfaces and misaligned bolt holes that require cleanup work.
If you are on a tight budget and have the tools and skills to do minor port matching and deburring, this can be a viable option. But if you want a reliable, out-of-the-box fit, you are better off spending more on a Edelbrock or Weiand. The Typhoon’s durability is also a concern, as some users have reported porosity issues.
- Affordable aluminum dual-plane with satin finish
- Designed for street use with mild cams and headers
- Includes water neck and carb studs
Pros: Very low price for an aluminum intake; Lightweight compared to cast iron
Cons: Inconsistent casting quality reported by some owners; May require port matching to achieve optimal flow
7. Weiand Team G 7540: Race Ready
The Weiand Team G 7540 is a race-oriented single-plane intake that prioritizes peak power over everything else. It is intended for engines that operate above 4000 RPM, making it a poor choice for daily drivers. Owner feedback from racers indicates it can deliver impressive gains when paired with a high-performance cam, headers, and a large carburetor. The casting is decent, but the manifold lacks provisions for EGR or heat crossover, which can cause cold-drivability issues.
This intake is not suitable for street use. If you are building a dedicated race car or a high-RPM bracket racer, the Team G can be a strong performer. But for almost any other application, a dual-plane will be more satisfying. We rate it lower due to its narrow use case and the high cost of the supporting parts needed to make it work.
- Open plenum single-plane for maximum high-RPM airflow
- Designed for serious race builds with large cams and high compression
- Lightweight aluminum construction
Pros: Excellent top-end power potential; Widely used in competition
Cons: Poor low-end torque and drivability on the street; Requires extensive tuning and supporting modifications
Frequently Asked Questions
What is the difference between a single-plane and dual-plane intake manifold for a 318?
A dual-plane manifold has two separate plenums that feed the cylinders in pairs, which helps maintain strong low-end torque and throttle response. A single-plane has one large plenum that allows better high-RPM airflow but sacrifices low-end power. For most street-driven 318s, a dual-plane is the better choice.
Will a 318 intake manifold fit a 340 or 360?
Yes, most aftermarket intake manifolds designed for the LA-series small-block Mopar (318, 340, 360) are interchangeable because they share the same cylinder head bolt pattern and port spacing. However, always check the manufacturer’s specifications for fitment with your specific engine year and head type.
Do I need to change my carburetor when upgrading the intake manifold?
Not necessarily, but to take full advantage of the new manifold’s flow capacity, you may want to upgrade to a carburetor in the recommended cfm range. Most performance intakes suggest 600-800 cfm. Your existing carb may work if it is within that range and properly tuned.
Can I use a 318 intake manifold with fuel injection?
Most of the intakes listed are designed for carbureted applications. For EFI conversions, you would need a specific EFI intake manifold (like those from Edelbrock or Holley) that has injector bungs and a throttle body flange. Some carb intakes can be adapted with an EFI throttle body adapter, but it is not ideal.
How much horsepower can I expect from a 318 intake manifold upgrade?
Gains vary depending on your engine’s current state and the manifold chosen. Based on manufacturer claims and owner feedback, a typical dual-plane intake paired with a matching cam and headers can add 15-30 horsepower. Single-plane intakes can add more peak power but often reduce low-end torque.
Our Verdict
After comparing flow data, construction quality, and real-world owner feedback, the Edelbrock Performer RPM 318 stands out as the best overall intake manifold for most 318 builds. It offers an ideal balance of low-end torque, mid-range power, and ease of installation. For budget-conscious builders, the Weiand Action Plus 8121 provides excellent value without major compromises. Choose your manifold based on your intended use: street, strip, or a mix of both.
Last reviewed and spec-checked: June 8, 2026. We re-check our picks and listings periodically.
