Air and Fuel› Intake Manifolds and Components
FAST
Throtte Body Big Mouth LT 92mm GM LS 4-Bolt
SKU: F003 54090
Easy — 1–2 hours
Description
Part #: 54090
FAST Big Mouth Throttle Bodies for the LSX 92mm and LSXR
Our Big Mouth 92mm Throttle Body for GM LS features a black wrinkle powder coating finish along with an improved throttle blade and pivot. In addition, our throttle body improves throttle response and eliminates blade deflection.
This product may expose you to chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm.
MIA's Description
Fitment
Fitment Guaranteed
Don’t gamble
on fit.
Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.
Available on iOS & Android
Specifications
| Brand | FAST |
| Part Number | F003 54090 |
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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