Air and Fuel› Intake Manifolds and Components

FAST

FAST Throttle Body LSX 102MM W/TPS

$346.95

SKU: F003 54103

In Stock
In Stock
Ships by Jun 9
Free Shipping
Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Description

The FAST Big Mouth LT Throttle Body with IAC and TPS, 102mm, is designed to increase airflow for LSX 102mm intake manifolds, improving engine breathing and throttle response. This optimizes overall engine performance by reducing airflow restrictions and enhancing throttle precision. Crafted from durable billet aluminum, it features an offset blade pivot for smoother operation, increased throttle blade thickness to prevent deflection under high-pressure conditions (boosted applications), beefed-up linkage, and dual throttle spring mechanism for reliable and responsive control.

Fitment

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Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

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Specifications

BrandFAST
Part NumberF003 54103

Videos

LS THROTTLE BODY TEST-92 VS 102 (IS BIGGER REALLY BETTER?)

LS THROTTLE BODY TEST-92 VS 102 (IS BIGGER REALLY BETTER?)
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UnBoxing The Big Mouth And Big Mouth LT Throttle Bodies From FAST
Speed Secrets: Does a Larger Throttle Body REALLY Gain Horsepower?

Speed Secrets: Does a Larger Throttle Body REALLY Gain Horsepower?
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How To Run 90mm LS3 Gold Blade Throttle Body On Gen 3 LS1 VS Silver Blade C5 Corvette
Running a LS3 Throttle Body on a Gen 3 5.3 #c10 #howto #lsswap #squarebodychevy #truck #squarebody

Running a LS3 Throttle Body on a Gen 3 5.3 #c10 #howto #lsswap #squarebodychevy #truck #squarebody

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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