FAST LSXR Manifold 102MM Rect Port - Black - 146102B

The FAST LSXR 102mm Intake Manifold in Black (PN 146102B) is a purpose-built, bolt-on performance upgrade designed specifically for GM LS3, L99, L92, and L76 rectangular-port engines. Engineered by Fuel Air Spark Technology (FAST) — one of the most respected names in LS-platform performance — this manifold delivers real-world power gains without sacrificing the low-end drivability that makes these engines so versatile. Whether you're building a street-driven Camaro SS, a Corvette track car, or a Pontiac G8 sleeper, the LSXR 102mm is one of the most proven manifold upgrades available for the LS3/L92 family.

Key Features & Benefits

• Advanced Polymer Construction: Built from the same advanced polymer material as the original FAST LSX 92mm intake manifold, this design is lighter than comparable aluminum aftermarket intakes — reducing underhood weight where it counts.
• Improved Heat Dissipation: The polymer construction offers improved heat dissipating characteristics compared to aluminum alternatives, helping keep intake charge temperatures lower for more consistent performance.
• Increased Strength: Despite being lighter than aluminum, the advanced polymer construction provides increased strength, making the LSXR a durable long-term solution for street and performance builds.
• 102mm Throttle Body Opening: The large 102mm bore is sized to flow with high-performance throttle bodies commonly used on modified LS3 and L92 builds, reducing airflow restriction at higher RPM.
• Rectangular Port Design: Matched to the factory rectangular port cylinder heads used on LS3, L92, L99, and L76 engines — no head modifications or adapters required for compatible vehicles.
• Bolt-On Performance Gains: Designed to deliver performance improvements without any loss in bottom-end drivability — a critical balance for street-driven applications.
• Standard Design Runners: Features FAST's standard runner configuration, optimized for mild street-oriented applications where broad powerband performance is the priority.
• Compatible with Interchangeable Runner System: The LSXR platform supports an interchangeable runner system, giving builders flexibility for future tuning or application changes.
• Black Finish: The popular black color provides an aggressive, clean underhood appearance that complements most engine bay builds.
• Replacement Parts Available: Upper shell (see FAST PN 146000B) and lower shell (see FAST PN 146001) are available separately, making long-term serviceability straightforward.
• CARB EO Compliant: Carries CARB EO number D-279-10 for emissions compliance information — consult local regulations for applicability to your build.

Specifications

• Brand: FAST (Fuel Air Spark Technology)
• Part Number: 146102B
• SKU: FST146102B
• UPC: 036584253037
• Throttle Body Bore: 102mm
• Port Style: Rectangular Port (LS3/L92/L99/L76 compatible)
• Finish/Color: Black
• Construction Material: Advanced polymer
• CARB EO: D-279-10
• Proposition 65: Yes — California Prop 65 warning applies

Fitment

The FAST LSXR 102mm Rectangular Port Intake Manifold (146102B) is confirmed to fit the following vehicles:

• 2010–2015 Chevrolet Camaro SS
• 2008–2013 Chevrolet Corvette (Base)
• 2010–2013 Chevrolet Corvette Grand Sport
• 2014–2017 Chevrolet SS (Base)
• 2008–2009 Pontiac G8 GT
• 2009 Pontiac G8 GXP

This manifold is designed for GM LS3, L99, L92, and L76 rectangular-port engines. It is not designed for LS7 cathedral-port or Gen III LS applications — FAST offers separate manifolds for those platforms. If you are unsure whether this manifold fits your specific engine or build configuration, contact our fitment team before ordering.

What's in the Box

The FAST 146102B LSXR manifold ships as a complete intake manifold assembly. If replacement shells are needed separately, the upper shell is available as FAST PN 146000B and the lower shell as FAST PN 146001. Contact us if you need clarification on included hardware for your specific application.

Why Buy from ThreePiece.us

• Free Shipping: Every order ships free — no minimum purchase required.
• Affirm Financing: Break your purchase into manageable payments with Affirm financing, available at checkout.
• Expert Fitment Support: Our team has served 10,000+ customers and is available to help verify compatibility for your specific vehicle and build. Call us at 813-535-5801 or email [email protected].
• Price Match Guarantee: Found it for less? We offer a price match guarantee on all products.
• In-Stock and Ready to Ship: The FAST 146102B is a regularly stocked product — not a special order item — so you can get your build moving without unnecessary delays.

Frequently Asked Questions

Q: Will this manifold fit my LS3-powered Camaro SS?
A: Yes. The FAST LSXR 146102B is confirmed to fit 2010–2015 Chevrolet Camaro SS models equipped with the LS3 rectangular-port engine. If your Camaro has a different engine variant or has been swapped, contact our team to verify fitment.

Q: Is this manifold suitable for a street-driven build, or is it race-only?
A: FAST designed this manifold with street applications in mind. It features standard design runners optimized for mild street-oriented use and is specifically noted to deliver bolt-on performance gains without any loss in bottom-end drivability — making it an excellent choice for daily-driven or street/strip builds.

Q: Does this manifold work with LS7 or Gen III (cathedral-port) LS engines?
A: No. The 146102B is a rectangular-port design, matched to LS3, L99, L92, and L76 heads. FAST makes separate manifolds for LS7 and Gen III cathedral-port applications. Using the wrong port style will result in a mismatch with your cylinder heads.

Q: Can I get replacement parts if I need to service the manifold later?
A: Yes. FAST offers the upper shell separately as PN 146000B and the lower shell as PN 146001, making this a serviceable long-term investment rather than a throwaway part. Contact our team if you need help sourcing replacement components.