FAST · New
FAST Throttle Body LSX 102MM W/TPS
MPN 54103 · Store SKU fst54103
Supplier stock checked 11/7/2026, 4:21:57 PM 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
These throttle bodies offer increased throttle blade thickness to eliminate deflection commonly found with other throttle bodies, especially those in boosted applications. A smoother operating offset blade pivot improves throttle response, and a beefed up linkage and dual throttle spring mechanism ensure total throttle control. Constructed from billet aluminum, the FAST Big Mouth 102mm Throttle Body with TPS and IACis designed to maximize performance upgrades on all Gen III and Gen IV engines with cable driven throttle bodies. The Fast Big Mouth 102mm throttle body provides increased airflow through a smoother offset blade pivot. In addition we increased blade thickness to eliminate deflection and a beefed up linkage and spring mechanism. Big Mouth Billet 102mm Big Mouth Throttle Body for GM LS w/ TPS and IAC
Manufacturer fitment & guides
Check 54103 against the manufacturer’s application information below.
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
