Product images and videos are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.
Air and Fuel› Intake Manifolds and Components
FAST
GM LS Intake Manifold - LSXR 92mm Black
SKU: F003 54039B
Easy — 1–2 hours
Overview
The FAST LSX 92mm Black Intake Manifold maintains performance gains over stock manifolds, with no loss in low RPM torque. It features corrosion-free stainless steel assembly bolts, an improved throttle body sealing flange and o-ring gasket, and threaded insert throttle body mounts for increased durability. It is also 50-state legal under C. A. R. B. E. O. #D-279-10.
Show original supplier description
Part #: 54039B
The patented LSX 92mm Black Intake Manifold from FAST is the only three-piece Gen
The FAST LSX 92mm Intake Manifold for GM LS1, LS2 and LS6 engines provides bolt-on performance gains without any loss in bottom-end drivability.
This product may expose you to chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm.
Vehicle Symptoms
- Loss of top-end power on LS1 engine
- Engine feels restricted at high RPM
- Poor throttle response after intake mods
- Hesitation during acceleration on LS2
- Noticing stock intake is bottleneck for power
Relevant Conversations
- LSX 92mm intake manifold vs stock LS1
- FAST 54039B intake manifold review
- Best intake manifold for LS2 street car
- Will FAST LSX manifold fit LS6?
- Intake manifold upgrade gains on LS
- LS1 rough idle after intake swap fix
- Cathedral port intake vs square port
- FAST 92mm throttle body compatibility
- LSX intake install time and difficulty
- Co-purchase fuel rails for FAST intake
Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.
Fitment
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Specifications
| Brand | FAST |
| Part Number | F003 54039B |
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Returns & Fitment
Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.
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Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.
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