FAST 54039B LSX 92mm Intake Manifold for 1997-2004 Corvette LS1/LS6 5.7L V8

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Product Specification:

SKU:FST54039B

MPN: 54039B

UPC: 036584255697

Weight: 16.9 lb

Inventory: 14

Type: Intake Manifolds

Vehicle Fitment

1997-2004 Chevrolet Corvette C5 (All Trims, 5.7L V8 LS1, RWD)
2001-2004 Chevrolet Corvette C5 Z06 (All Trims, 5.7L V8 LS6, RWD)
1998-2002 Chevrolet Camaro Z28/SS (All Trims, 5.7L V8 LS1, RWD)
2004-2006 Pontiac GTO (All Trims, 5.7L V8 LS1, RWD)
1999-2007 Chevrolet Silverado 1500/2500 (All Trims, 5.7L V8 LS1, 2WD/4WD)
1999-2007 GMC Sierra 1500/2500 (All Trims, 5.7L V8 LS1, 2WD/4WD)

Fitment Notes

Requires cathedral port cylinder heads (LS1/LS6); compatible with RWD/2WD/4WD drivetrains.
Does not fit rectangular port LS2/LS3 heads, boosted setups over 45 psi, or non-LS1/LS6 engines.
Fitment confirmed through 2024. 2025 unconfirmed.

Features

Polymer construction eliminates heat soak for up to 30 hp gains in 5,000-7,500 rpm range over aluminum manifolds.
92mm throttle body opening supports large TBs for unrestricted high-RPM performance.
Interchangeable tall/medium/short velocity stacks optimize airflow for NA or boosted applications up to 45 psi.
Compound injector angle improves fuel atomization for better combustion and drivability.
Reversible top allows forward- or firewall-facing throttle body installations for custom setups.
Integrated nitrous bosses per runner enable direct-port nitrous or water-methanol injection.
Lightweight design reduces underhood weight for improved handling and acceleration.
Backed by 1-year warranty for materials and manufacturing defects.

Specifications

Position: Upper Intake Manifold
Throttle Body Flange: 92 mm
Port Style: Cathedral Port
Material: High-strength polymer, black finish
Velocity Stacks: Tall (interchangeable with medium/short)
Boost Pressure Rating: Up to 45 psi continuous
Weight: 12 lbs
Engine: 5.7L V8 LS1/LS6

Included Components

1x LSX Intake Manifold
1x Velocity Stack Set (Tall)
1x Stainless Steel Bolts and Hardware Kit

Product Description

The FAST 54039B LSX 92mm Intake Manifold is a groundbreaking polymer manifold designed for 1997-2004 Corvette C5, 1998-2002 Camaro Z28/SS, 2004-2006 Pontiac GTO, and 1999-2007 Silverado/Sierra 1500/2500 with the 5.7L LS1/LS6 V8, delivering up to 30 hp gains in the 5,000-7,500 rpm range by eliminating heat soak inherent in aluminum designs. Featuring interchangeable tall/medium/short velocity stacks and a 92mm throttle body opening, this black polymer manifold optimizes airflow for naturally aspirated or boosted applications up to 45 psi, with a compound injector angle for superior fuel atomization and drivability. Ideal for street/strip builders seeking a lightweight, reversible top design with nitrous bosses, it fits cathedral port heads in RWD/2WD/4WD setups, enhancing efficiency and performance for championship-level results.

Installation is a direct bolt-on replacement, typically taking 2-4 hours with basic tools and no modifications, compatible with OEM accessories and factory fuel rails. The high-strength polymer construction reduces weight by 50% over aluminum while resisting up to 700°F, ensuring consistent performance in racing or daily driving. This manifold fits all listed LS1/LS6-equipped vehicles but excludes rectangular port LS2/LS3 heads due to port mismatch. Backed by FAST's 1-year warranty, the 54039B transforms your LS-powered GM vehicle into a high-revving powerhouse ready for the track or street.