FAST · New
FAST Throttle Body LS 102MM
MPN 54104 · Store SKU fst54104
Supplier stock checked 11/8/2026, 2:15:47 AM UTC. Adding a part does not reserve it.
Request a return within 30 calendar days after delivery. New parts must be unopened and unused.
Shipping & returns ↗This policy does not limit rights required by law.Free standard shipping on eligible parts orders of $100 or more. Oversized and freight items excluded. Fitment, taxes, availability and final totals are confirmed before payment.
Product details
All the benefits of the current Big Mouth 102mm Throttle Body(TM) are now available for drive-by-wire applications, thanks to the new FAST(TM) 102mm Electronic Throttle Body for GM LS Engines. This new electronic throttle body provides a huge increase in airflow over stock – especially when running a FAST manifold. However, it maintains stock characteristics at idle. The electronic throttle body is designed to be plug-and-play for most stock Gen IV LS ECUs including but not limited to L76, L77, L99, LS3, or LS7. It works well with the Edelbrock ProFlo4+ or any aftermarket EFI system designed to control a GM LS-style electronic throttle body. A high-performance, high-torque motor delivers a quicker response over competitors' weaker stock motors and features a rock-steady throttle blade in for boosted applications. Additionally, utilizing a dual return spring and a precision non-contact TPS increases reliability, the throttle body also features a stylish satin black anodized finish for excellent aesthetics and a unique look. The FAST(TM) 102mm Electronic Throttle Body for GM LS Engines does not use any stock components and has been designed for increased performance and reliability. The FAST 102mm Big Mouth Electronic Throttle Body for GM LS Engines, designed with an upgraded motor and dual return springs for quicker response and reliability, maintains stock characteristics at idle while increasing airflow over stock. The new FAST(TM) GM LS 102mm Big Mouth Electronic Throttle Body is designed to outperform all other aftermarket drive-by-wire throttle bodies for high-performance LS engines and look good in the process.
Manufacturer fitment & guides
Check 54104 against the manufacturer’s application information below.
A manufacturer application guide is not available for this listing. Request the exact application from JuiceBuilt before payment.
Part-specific notes
- Not CARB approved. Destination and intended-use restrictions must be checked before sale.
- Emissions acknowledgement required before purchase.
- California Proposition 65: Y
