6 Best LS1 Intake Manifold Reviews [Buying Guide 2021]

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Are you facing overheating and leakage problems with your engine? Well then, you should remember that ignoring such difficulties might worsen the situation. Not only that, but it might also lead to engine failure and accidents.

For ensuring the safety of your engine, consider installing an ls1 intake manifold. It will give amazing power gain with safety from all these issues you are facing.

However, choosing the perfect intake manifold for your LS1 engine can be confusing. We have reviewed the 6 best ls1 intake manifolds for helping you.

Let’s start with the product table below to get an overall idea about the products.

Best Intake Manifold for LS1 – Comparison Table

Product NameKey FeatureRPM RangePrice
1. Edelbrock 7118 Performer LS1 Intake ManifoldImproved Throttle1500-6500
2. FAST LSXr 102mm LS1 Intake ManifoldImpressive durability1800-6000
3. Holley 300-137 LS1 Single Plane Intake ManifoldLong-lasting Build2500 - 7000
4. LSXr 102mm LS1 Intake ManifoldHigh-quality Materials1800-6000
5. BTR Equalizer LS1 Intake ManifoldPortable Design6000-8000+
6. FAST 54039B LSX Black 92mm Intake ManifoldDurable Build1500-6000

6 LS1 Intake Manifold Reviews

So, you got a glimpse of the products from the table above. Now we will discuss the details of each product. Read on to find out the best intake manifold for your LS1 car.

1. Edelbrock 7118 Performer

Edelbrock 7118 Performer LS1 Intake Manifold. best ls1 intake manifold
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Technical Details

  • Brand: Edelbrock
  • Model: 7118
  • Weight: 23.4 pounds
  • Exterior: Satin

The Edelbrock 7118 Performer enables the use of the traditional carburetor with computer-controlled engines.

This one can work with the Original Equipment Manufacturer’s sensors. Hence, you get a wide array of timing curve choices.

The Edelbrock manifold has a unique throttle and transmission bracket combination. With this, you will be able to work with 700-R4, TH350, and TH400 transmissions.

What’s more, this intake manifold provides maximum power between 1500 to 6500 RPM. All these features make it perfect for everything from muscle cars to marine applications.

Features & Benefits

Improved Throttle

The Edelbrock 7118 comes with an improved throttle body. This throttle along with the transmission bracket can work with both TH350 and TH400 transmissions.

Enhanced Ignition Control

This model of Edelbrock has included an impressive ignition control system. The ignition control optimizes the OEM sensors to give you the option among six timing curves for firing the ignition system.

Carburetor Inclusion

Usually, on computer-controlled engines, you can’t use carburetors. However, this intake lets you use the square bore flange carburetor with the ls1 engine for ensuring better performance.

Pros

  1. Great for multiple applications
  2. Provides optimum performance
  3. Ensures a wide torque curve
  4. Presents many timing curves
  5. Works with three transmissions

Cons

  1. The mounting bracket is not durable

 

2. FAST LSXr 102mm LS1 Intake Manifold

FAST LSXr 102mm LS1 Intake Manifold. best intake manifold for ls1 turbo
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Technical Details

  • Brand: FAST
  • Model: 146302B
  • Weight: 19.45 pounds
  • Dimensions: 28.1 x 16.4 x 10.1 inches
  • Exterior: Polymer

The FAST LSXr 102mm LS1 is famous for providing increased bolt-on 10-25 HP without jeopardizing drivability.

The 102mm air inlet is perfect for the FAST Big Mouth 102mm Throttle Body. Moreover, it is also suitable for both 90 and 92mm throttles.

You will receive long-lasting power gains from this 102mm intake manifold. The advanced polymer and stylish black finish make it one of the best intake manifolds for ls1.

Lastly, less restrictive removable runners provide more opportunities for tuning. Also, this manifold works perfectly with the 4.8, 5.3, and 6.0L trucks.

Features & Benefits

Impressive durability

The superior polymer material gives the FAST LSXr extreme durability. This manifold is much lighter than aluminum ones but provides more strength.

Remarkable Cooling

The FAST LSXr provides enhanced cooling for your engine with a larger air inlet. Also, the polymer material improves cooling power with increased heat dissipation power.

Removable Runners

This one highlights an innovative modular design. You will be able to tune it to your heart’s content with the ability to remove individual runners.

Pros

  1. Approved by the C.A.R.B.
  2. Elegant black design
  3. Lightweight and portable
  4. Easy dissembling and installation
  5. Ensures better cooling

Cons

  1. Requires drilling for mounting the sensors

 

3. Holley 300-137

Holley 300-137 LS1 Single Plane Intake Manifold. best intake manifold for ls1
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Technical Details

  • Brand: Holley
  • Model: 300-137
  • Weight: 14.05 pounds
  • Exterior: Satin

The Holley 300-137 is ideal for the GM Gen 3 and 4 LS engines.

One great feature of this intake manifold is that it works with both EFI and carbureted applications. This is also great for engines that use power adders like nitrous oxide.

The excellent cast aluminum finish makes this manifold only 11.5 pounds. Hence, you will enjoy all the benefits of the ls1 manifold with a lightweight finish.

Moreover, the constant cross-sectional area of the runner produces a broad torque curve. This enables it to optimize a wide power range of 2500-700 RPM.

Features & Benefits

Long-lasting Build

The one is built with superior cast aluminum advanced. As a result, you get to enjoy uniform wall thickness and powerful mounting flanges for a long time.

Faster Temperature Control

The unique runner design uses airflow to improve the cooling system. Also, the consistent aluminum wall thickness allows faster thermic temperature control.

Broad Power Band

The Holley 300-137 manifold can work with the broadest powerband you can imagine. It provides increased power gain from 2,500 to 7,000 RPM.

Pros

  1. Cast aluminum provides high durability
  2. Wide power band of 2,500-7,000 RPM
  3. Creates large torque curve
  4. Ensures raised hood clearance
  5. Efficient thermal control

Cons

  1. Cannot be used with a carburetor

 

4. LSXr 102mm

LSXr 102mm LS1 Intake Manifold.
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Technical Details

  • Brand: FAST
  • Model: 146302B-KIT
  • Weight: 29.8 pounds
  • Dimensions: 30 x 23 x 21.5 inches
  • Exterior: Painted

The LSXr 102mm boosts throttle response utilizing its 102mm large throttle body.

You will enjoy decreased deflection with the billet throttle blades. Also, the polymer intake stops the heat from soaking in.

The removable runners provide maximum optimization features for power band tuning. The innovative technology used in this intake manifold provides improved airflow and broad torque.

Moreover, you get the option of adding billet fuel rails. The 102 mm throttle body highlights a sleek billet aluminum surface.

Features & Benefits

High-quality Materials

The exceptional polymer material of the LSXr ensures enhanced cooling. You get to enjoy increased airflow with greater engine efficiency.

Various Applications

This one can be used with a wide array of engines. The GM LS engines 4.8, 5. 3, 5. 7, 6. 0, 6. 2- all work great with the LSXr manifold.

Impressive Design

With this intake manifold, you get excellent performance and an elegant design. The stylish black polish and FAST logo will enhance the overall look of your engine.

Pros

  1. Enhanced throttle response
  2. Increased airflow control
  3. Great for GM LS engines
  4. Impressive billet aluminum polish
  5. Built with high-quality polymer

Cons

  1. Doesn’t produce enough power gain

 

5. BTR Equalizer

BTR Equalizer LS1 Intake Manifold.
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Technical Details

  • Brand: Michigan Motorsports
  • Model: ‎IMA-01

The BTR Equalizer is suitable for cathedral port head applications.

This manifold comes with not only billet fuel rail tools but also a Lokar throttle cable bracket. These kits make this suitable for port head applications.

You will enjoy high durability with this one. Because it is built with superior quality 319 cast aluminum.

Other unique features of the BTR intake manifold are the O-Ringed port opening and the Lid surface Easy Insert Steep Chamfer Injector Bores. These features ensure effortless injector bore insertion and high power gain.

Features & Benefits

Portable Design

This manifold has a unique two-piece design. This design along with the lightweight CAD-generated layout makes it highly portable.

Increased Hood Clearance

The BTR Equalizer features an innovative underslung plenum. This unique plenum provides maximum hood clearance.

Innovative Injector Bores

This one has Lid surface Easy Insert Steep Chamfer Injector Bores. Hence, you can insert the injector o-rings effortlessly.

Pros

  1. Ensures minimal massaging
  2. High portability
  3. Lightweight design
  4. 6000 to 8000 plus RPM
  5. Great for cathedral port head purposes

Cons

  1. Injector bores are not durable

 

6. FAST 54039B LSX Black

FAST 54039B LSX Black 92mm Intake Manifold
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Technical Details

  • Brand: FAST
  • Model: 54039B
  • Weight: ‎9.99 pounds
  • Dimensions: ‎27.9 x 16.4 x 9.7 inches
  • Exterior: Machined

The FAST 54039B LSX Black provides extended performance without jeopardizing high RPM power.

This manifold works great for street and racing applications. The effortless bolt-on installation process makes it user-friendly.

Even though you will get great performance gain with the intake manifold, you can further tune it to suit your vehicle. It can be ported by the user for maximized flow.

The corrosion-resistant stainless steel bolts and throttle body with sealing flange provide amazing durability. Lastly, the o-ring gasket and threaded insert throttle also increase the functionality.

Features & Benefits

Durable Build

The high-quality polymer material makes this intake manifold highly durable. Also, the stainless steel bolts, throttle body mounts add to the durability.

Impressive Throttle

This intake has an enhanced throttle body with a sealing flange. It also features an improved o-ring gasket.

High Power Gain

The FAST LSX 92mm Black ensures high power gain and maintains the performance over the stock one. However, it achieves the power gain without loss in drivability.

Pros

  1. Legal in fifty states
  2. Improved O-ring gasket
  3. Increases engines power gain
  4. Durable stainless steel body
  5. Heat sink resistant

Cons

  1. Will not fit V6 motors

 

LS1 Intake Manifold Replacement Guide – Buying Guide

Choosing the correct ls1 intake manifold is a little bit challenging task. You will have to consider several factors before buying the intake manifold. The subsequent points will help you in choosing the best one for your LS1 engine.

Types of Plane

The type of plane is an important factor to consider before choosing a manifold. Dual plane, air-gap, tunnel ram, and single plane are the most common intake manifolds.

Dual plane intake manifolds feature two independent plenums. They produce extremely clean induction pulses at low rpm.

Single plane manifolds have only one plenum. This ensures equal and better flow distribution between cylinders.

The tunnel-ram intake manifolds feature dual-carburetors. Their single plane ensures the expansion of the RPM powerband.

Hood Clearance

Hood clearance is a significant feature for street racing cars. For availing of this feature choose the intake manifolds that are the same size as your stock manifold. You can also enjoy a larger one through an air cleaner.

Cylinder Port Style

Cylinder ports can be of several styles like rectangular, peanut-style, and oval. Hence check the cylinder port style of the manifold. The runner ports have to match the intake ports of the cylinder.

Mounting Pad Configuration

Several kinds of mounting pads are available for four-barrel carburetors; such as dominator, spread bore, and square bore. Therefore, ensure that your intake will suit the mounting pad of your carburetor. In fuel injection manifolds inlet on the throttle has to match the throttle body.

LS1 Intake Manifold Leak Symptoms?

You will either face coolant leaking from the gaskets, or air leaking out of the regular air passages. While air leaking can affect the performance of the engine, coolant leaking can ultimately lead to engine failure.

Therefore it is important to know the ls1 intake manifold leak symptoms. If you can identify the symptoms early on, you will be able to save your engine from damage.

Overheated Engine

The most usual symptom of intake manifold leak is an overheated engine. When the indicator hovers close to or crosses the red area in the temperature gauge, it means the engine is overheating. Also, if the indicator moves about erratically, you possibly have a coolant leak.

Low Performance of Engine

A leaking gasket absorbs more air than required and disrupts the air-fuel proportion. This imbalance affects the engine strength and piston speed.

Uneven acceleration and sparse pauses before speeding are other symptoms.

Coolant Leak

The intake manifold carries both the air-fuel mixture and coolant. In case of a leaking gasket, you may find a puddle below the front of the car. If the spill is soap-like and rinses off easily, it is coolant.

Vacuum Air Leaks

For checking the air leak, start the engine and let the car sit idle for a few minutes. Spray some carburetor cleaner on the place where the manifold and engine are joined together. If the vehicle idles quicker and creates soft revving, your gasket is leaking air.

How to Remove LS1 Intake Manifold?

Before placing your new ls1 intake manifold, you have to remove the former intake manifold. Removing the manifold can be slightly difficult. Therefore, follow the correct procedure for inhibiting harm to your engine.

#1. Begin by disconnecting the battery.

#2. Then carefully separate the wiring harness, and air temperature sensor from the M.A.S and the intake tube.

#3. Take out the air cleaner and disengage the cool air intake tube from the throttle.

#4. Disconnect the wiring fittings from T.P.S. and I.A.C.

#5. Then remove the Exhaust Gas Return pipe from the intake.

#6. Detach the coolant tubes from the bottom of the throttle.

#7. Take out the throttle body from inside of the intake.

#8. Detach the cable bracket of throttle from the intake manifold.

#9. Remove the wiring gears from the vacuum switches and eight fuel injectors.

#10. Extract the injectors and the fuel rails from the compartment of the engine.

#11. Take out ten mounting bolts from the manifold-to-cylinder head.

#12. Remove the LS1 intake manifold from the engine.

How to Install LS1 Intake Manifold?

To enjoy your brand-new intake manifold accurately, you need to master the proper installation process. Otherwise, trivial errors might cause disturbances to your engine.

#1. After taking out the former one, clean the mounting area of the cylinder head using a fresh cloth and acetone.

#2. Place the intake manifold in position.

#3. Do not slide the manifold as it can cause dislocation of the seals and create a leak.

#4. Smear thread securing mixtures to the bolt strings.

#5. Install all of the bolts tightly.

#6. Remember to place brackets that hold the intake bolts carefully.

#7. Tighten the bolts using a high-quality torque wrench in two passes.

#8. Connect the vacuum lines and all the electrical connections.

#9. Install the intake tube and also the throttle body.

#10. Lastly, connect all detached wires and fittings.

How to Clean LS1 Intake Manifold?

The fuel and air quotient will become imbalanced in the case of carbon build-up inside the intake manifold. As a result, fuel-burning and power loss will increase.

Following these simple steps, you can clean your ls1 intake manifold without taking it out of the engine.

#1. Exhaust fumes can cause suffocation. Therefore, park the car in an open space.

#2. Power foaming cleansers are created for safely removing the grime and additional carbon precipitates. Hence, get a power foaming cleanser.

#3. A fresh microfiber towel is needed for removing the excess fluid from the engine.

#4. Wear gloves for keeping your hands safe from the high temperature and toxic chemicals of the engine.

#5. Keep the wrenches, and screwdrivers nearby for removing the pipes.

#6. Disconnect the throttle and the air intake duct while the engine is turned off.

#7. Spray some of the power foam on the throttle valve surface and wipe excess fluid using the microfiber cloth.

#8. Reconnect the throttle with the air intake tube.

#9. For cleaning the vacuum line disconnect the vacuum hose from the intake manifold.

#10. Spray power foam inside the vacuum line and let it sit for five minutes.

#11. Wipe the vacuum lines inside with a clean cloth and reattach them to the hose.

FAQ

Q: How can I tell if I have an LS1 or LS6 intake?

Answer: If you have a round block-off plate mounted on top of the intake manifold, then you have the LS1. However, if you see a thick plastic surface, then yours is an LS6.

Q: How much HP is an LS1?

Answer: A LS1 can get up to 350 HP rated at 4400 RPM.

Q: Will LS3 intake fit LS1?

Answer: The LS1 is created for the cathedral port head. Therefore, the LS3 intake won’t fit LS1.

Final Words

As you’ve noticed, the best ls1 intake manifold can enhance the performance of your engine. However, an incorrect decision can cause damage to your engine. Hence, you must make certain that you are choosing the most suitable one.

Go over all the aspects thoroughly and find your perfect match. However, according to us the Edelbrock 7118 Performer LS1 Intake Manifold is the ideal ls1 intake manifold. This manifold provides the perfect combination of power gain and durability.

Happy Driving.

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