FAST
FAST LSXR Mid-Range High HP LS3 Assembly
SKU: F003 146103B
Description
Part #: 146103B
Constructed from the same advanced polymer material as the original FAST LSX 92mm Intake Manifold, but now in the popular black color, the LSXR offers a host of benefits over aluminum aftermarket intakes, including lighter weight, increased strength and improved heat dissipating characteristics.
Features:
- Modular design allows for fast and easy disassembly
- Removable runners allow for porting
- Improved throttle body sealing flange and o-ring gasket
- High quality polymer materials resist the heat sink effecct of aluminum
- Maximizes potential of other engine performance upgrades like cylinder heads
- Designed to work with FAST Big Mouth and Big Mouth LT Throttle Bodies
- Includes stainless steel bolts, threaded insert throttle body mounts and necessary mounting hardware.
- High HP runners are shorter and straighter than conventional runners to improve high-RPM HP.
- High HP runners make 20+ HP over original LSXr manifold.
The FAST LSX 102mm Intake Manifold for GM LS3/L92 engines provides bolt-on performance gains without any loss in bottom-end drivability. This manifold features our High HP runners for use in modified street/strip oriented applications.
This product may expose you to chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm.
Fitment
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Available on iOS & Android
Specifications
| Brand | FAST |
| Part Number | F003 146103B |
Videos
FAST LSXR Intake Manifold Install on 2013 Camaro - Summit Racing
FAST LSXR INTAKE-IS IT WORTH $1000? HOW MUCH HP DOES IT ADD? LSXR VS CHEAP, JUNKYARD TRUCK INTAKE
Dyno Tested: FAST 102mm LSXR Intake Interchangeable Runners
Speed Secrets: FAST LSXR Intake Runner Set Test
Advantages and disadvantages of F.A.S.T LSXR Intake manifold
Fast LSXR 102mm Intake Manifold | What Is It?!
Did You Pick The Right LS Intake Manifold?
Fast 102 Intake Install!
Fast 102 on LS1 (how to)
LS INTAKE TEST-STOCK TRUCK vs TBSS vs FAST LSXRT-PRICE VS POWER
Testing LS Intakes! Which LS3 Intake Makes the Most Power? [Can Stock Keep Up?]
Review: FAST's LSX Manifolds - How to Choose The Right Intake
Ultimate LS3 Intake Manifold Dyno Shootout Results (WATCH BEFORE BUYING!)
2015 SEMA Show | FAST GM LS3 102mm Intake Runner Sets
LS THROTTLE BODY TEST-92 VS 102 (IS BIGGER REALLY BETTER?)
Buy with Confidence
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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