How To Pick A Good LS1 Intake Manifold?

An intake manifold is essentially a solid cast component made up of many cylindrical tubes that are folded around to deliver a fuel/air mixture to the engine. The intake manifold injects either an optimized fuel/air mixture or indirect injection models, only air into the cylinder heads. The even distribution and amount of air added to the mixture provides differing levels of performance, ranging from stock to racing and heavy-duty hauling.

List of Top-Rated LS1 Intake Manifolds

FAST 54039B FAST 54039B1997-200512” x 3” x 6”View on Amazon
Dorman 615-900 Dorman 615-9002001-200523.3” x 13.8” x 7.4”View on Amazon
Professional Products 52060BOXI Upper Intake Manifold2007-200820.5” x 18.4” x 13.1”
View on Amazon
Holley 300-137 Holley 300-1371997-200723” x 14” x 7”View on Amazon
Fast 146302B Fast 146302B1997-200724” x 15” x 7”View on Amazon
LS1 Intake Manifolds

Aftermarket intake manifolds are designed to counter the throttle valve restriction found in reciprocating spark ignition piston engines. The added manifold air counters the vacuum produced by the engine, and increases performance, driving power up and improving torque.

Modern performance upgrade manifolds are usually made from cast aluminum and come with a plethora of finishes. Some modern plastic composites that provide thermal and strength benefits at a fraction of the cost are slowly replacing the aluminum models.

The Best LS1 Intake Manifolds Reviews

FAST 54039B — LSX Black 92mm Intake Manifold

FAST 54039B

This is the FAST 54039B LSX Black 92mm Intake Manifold for LS1 applications


The FAST LSX is a 92mm three-piece black intake manifold made for GM Gen III (LS1, LS2, and LS6) applications. This is easy to bolt-on, a black intake manifold that delivers performance upgrade over stock manifolds.

The material used by fast is their proprietary black polymer that is lighter and stronger than aluminum and delivers exceptional performance characteristics including reducing the “heat sink” effect of aluminum.


  • Improved throttle body sealing flange and O-ring gasket
  • High-quality polymer materials
  • 92mm Throttle Body
  • Stainless steel bolts, threaded insert throttle body mounts, and all mounting hardware


FAST is a leader in innovative polymer solutions, and as such you pay an exceptional price (high) but get a perfect solution that outperforms aluminum significantly.

Dorman 615-900 — Plastic Intake Manifold

Dorman 615-900

This is the Dorman 615-900 OEM replacement Plastic Intake Manifold


The Dorman GM Intake Manifolds are designed to replace factory manifolds and deliver improvement in mpg and emissions. This model uses both polymer plastics and reinforced aluminum coolant crossovers, to provide an optimized performance against vibration and corrosion.

This is a 78mm throttle body design with a 2.75” x 1.5” port outlet, and the whole component is only 7” high.

The integrated silicone intake gaskets deliver exceptional sealing properties that outperform stock gaskets, and the walls are thicker, providing a more thermally secure and constancy controlled cool air environment that helps prevent gasket warping.


  • Black Plastic and Aluminum
  • Silicone Gaskets
  • 78mm Throttle body


This is the budget-friendly polymer performance manifold, it delivers over stock performance and comes with an attractive price for a composite material model.

BOXI Upper Intake Manifold  — For 2007-2008 Ford E-150 E-250 F-150

Professional Products 52060

This is the BOXI Upper Intake Manifold For 2007-2008 Ford E-150 E-250 F-150.


Boxi Upper Intake manifold is a perfect replacement whose design can match the original intake manifold perfectly. The best way to have a better deal is to verify your OEM number before placing an order from any dealer.

Another useful feature is durability. This product has heat-resistant polymers, which reduces warping and coolant leaks. Plus, it has an aluminum coolant crossover, a reinforced material that lowers vibration and corrosion.

Boxi Intake Manifold undergoes multiple tests before accessing the market to ensure they match the OEM form. As such, this intake manifold becomes fit and functional.


  • Improved technology and outstanding performance
  • Sturdy and durable construction
  • Thorough factory testing
  • Polished Finish


This product exceeds the manufacturer’s expectation as it passes various tests to ensure that it fits original units. As if that is not over, as a buyer, you will enjoy long service hence worthy of the top dollar.

Holley 300-137 — LS1/LS2/LS6 Single Plane Intake Manifold

Holley 300-137

This is the Holley 300-137 Single Plane Intake Manifold for LS1, LS2, and LS6 applications.


The Holley 300-137 is a spider-shaped intake manifold that provides 2,500-7,000 RPM broad powerband of performance. This model weighs 11.5 lbs, so you get that optimized lightweight performance too. This model uses an LS Single Plane Mid-Rise design and works with both carbureted and EFI applications.

The runner design of the intake manifold utilizes airflow to improve cool air reduction, and the wall thickness of the aluminum supports faster thermal temperature control.

This model is designed as an ultra-low model; the port sizes are 2.66″H x 0.92″W, and the Carb Mounting Flange Height from Lifter Valley Cover Flange is only 4.95″.


  • 2,500-7,000 rpm power band
  • Cast aluminum construction
  • Constant cross-sectional area
  • Accepts a carburetor/throttle body with a Holley 4150 square bore flange
  • Available with machined ports for EFI installation


This is a leading and popular LS1 intake manifold kit that is appearing in a lot of performance upgrades across the US. This a top-rated aftermarket upgrade.

Fast 146302B — LSXr 102mm Intake Manifold for LS1, LS2, and LS6

Fast 146302B

This is the Fast polymer LSXR 102mm Intake Manifold for LS engines.


The Fast LSXr 102mm Intake Manifold uses a complex polymer material and is a performance manifold designed to outperform aluminum intake models. This is a black colored polymer that comes with lighter weight, increased strength and improved heat dissipating features that deliver better performance than aluminum manifolds.

This model is designed for cathedral port LS1/LS2/LS6 engines. This 102mm model features a unique modular design that provides you with a fast and easy disassembly as well as enables you to remove individual runners for porting.

This model also comes with integrated nitrous bungs and accurate bolt-on fitment for factory accessories without modification or clearance concerns.


  • Modular design for fast and easy disassembly
  • Abel to remove individual runners for porting.
  • Constructed from an advanced polymer material.
  • 102mm air inlet
  • Integrated nitrous bungs
  • Precise bolt-on fit


Fast is a leading innovator in modern materials, and this is one of their successful and exceptional performance models that delivers ultra-lightweight performance at a high price, yes, a high price, it is a top-rated model that delivers one of the best performance standards on the aftermarket today.

LS Engine FAQ

When LS V8 was introduced?

GM first introduced its LS V8 engine in 1970. This engine was a completely new design and only had its rod bearings, lifters, and bore spacing parts that were shared with the older Chevrolet small-block V8. The first and basic LS variations used cast iron blocks, and the performance models were cast out of aluminum alloy and had cast-iron cylinder liners.


How many LS-engine types exist?

There are three generations of LS small-block engines, and they are II, IV, and V. The latest generation V is, in fact, an LT1 designated model, and it was introduced in 2014.

Several versions of the LS were used in the Chevrolet Corvette, beginning with the LS1 in 1997 through the LS9 and others in 2013. Variants of the LT version of the GM small-block have been used since.

The LS1 engine was first introduced in 1997 and was mounted in a Corvette. This engine was rated at 345 hp (257 kW) at 5,600 rpm and 350 lb/ft (475 N/m) at 4,400 rpm.

In 2001, the improvement was made to the intake and exhaust manifolds, and the rating improved to 350 hp (261 kW) and 365 lb/ft (495 N/m).

The LS1 was used in Corvette’s between 1997 to 2004 as well as being used in 1998-2002 GM F-Body Camaro and Trans Am applications and delivered a rating of over 305–325 bhp (227–242 kW).

About the author

Glenn Freeman

The eagle-eyed autosports journalist, guest commentator, the proud owner of GMC Sierra 1500, auto parts & auto repair consultant. You can follow him on Twitter

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