



💥 Unleash your engine’s full potential with the FAST Big Mouth 102mm throttle body!
The FAST 54103 Big Mouth 102mm Throttle Body is a precision-engineered performance upgrade designed for FAST LSXR intake manifolds. Featuring an enlarged throttle opening, thicker blades to prevent deflection, and a dual spring mechanism for superior throttle control, it optimizes airflow and throttle response while maintaining smooth drivability. Ideal for high-performance and boosted engines, this throttle body delivers reliable, race-ready performance with advanced airflow dynamics and durable construction.
| Operation Mode | manual |
| Contact Type | Normally Open |
| Connector Type | Screw |
| Brand | FAST |
| Terminal | Screw |
| Item dimensions L x W x H | 13.3 x 10.8 x 5.2 inches |
| Circuit Type | 1-way |
| Actuator Type | Hinge Lever |
| Contact Material | Copper |
| International Protection Rating | IP44 |
| Control Method | App |
| Connectivity Protocol | X-10 |
| Color | Silver |
| Unit Count | 1.0 Count |
| Number of Items | 1 |
| Global Trade Identification Number | 00036584208136 |
| Manufacturer | FAST |
| Vehicle Service Type | High-Performance Vehicles |
| Control Type | Manual |
| Compatible Devices | FAST LSXR intake manifolds, FAST brand devices |
| UPC | 036584208136 |
| Model | FAST - Throttle Body LSX 102MM W/TPS (54103) |
| Item Weight | 3.96 pounds |
| Product Dimensions | 13.3 x 10.8 x 5.2 inches |
| Item model number | FST54103 |
| Exterior | Machined |
| Manufacturer Part Number | 54103 |
| OEM Part Number | 54103 |
M**.
Big and beautiful
I had to send back, my fault for not doing research, was wrong one. I will say taking it out of box the craftsmanship is top. It's definitely sexy. Shipping was crazy fast with no issues. Highly recommend.
R**R
Awesome
Very fast shipping looks great A+++
B**Y
102 fast big month thottle body
great , and worked right out off the box , looks great and looks great with the 102 fast intake.
A**O
Perfect
Perfect fit with my new intake manifold. I got a 2000 camaro z28 with an ls1
J**.
Not meant for a computerized vehicle!
This does not function for any vehicle with a computer in it! We bought it for our 2008 Chevy Tahoe. What a joke!
S**N
Five Stars
A++++++
A**Y
Great quality!
Great item but unfortunately not for my car.
A**D
TPS & IAC are missing
Unfortunately l received my Fast 54103 Throttle body without TPS & IAC.
Trustpilot
5 days ago
2 weeks ago