Step beyond the typical 103mm and 105mm throttle body when your LS build demands even more air. The Granatelli 108mm Drive-By-Wire throttle body combines massive airflow capacity, a powerful electronic motor and billet construction for naturally aspirated and boosted combinations pushing serious horsepower.
The Granatelli GMTBLS108 108mm Drive-By-Wire Throttle Body is CNC-machined from high-grade 6061-T6 billet aluminum and engineered for high-performance GM LS3, LSA and LSX applications. Its massive 108mm bore is designed to deliver approximately 40% more airflow at 7,000 RPM, helping reduce intake restriction and support stronger engine performance.
A high-performance electronic motor provides precise throttle control and is engineered to handle demanding forced-induction combinations producing up to 25 psi of boost. The complete assembly uses the OEM-style GM 6-pin connector and includes the necessary adapter for compatible installations.
108MM OF SERIOUS LS AIRFLOW.
~40% MORE AIRFLOW AT 7,000 RPM • UP TO 25 PSI
Built for combinations where airflow demand has moved far beyond stock, the Granatelli 108mm DBW throttle body helps feed high-output naturally aspirated, supercharged and turbocharged LS engines without sacrificing electronic throttle control.
Key Features
- Massive 108mm throttle bore for increased airflow capacity
- Delivers approximately 40% more airflow at 7,000 RPM
- Designed for high-performance GM LS3, LSA & LSX applications
- Electronic Drive-By-Wire throttle control
- Uses the OEM-style GM 6-pin DBW connector
- CNC-machined from high-grade 6061-T6 billet aluminum
- High-performance electronic motor for precise throttle control
- Engineered to safely control airflow under up to 25 psi of boost
- Designed for naturally aspirated and forced-induction applications
- Excellent for TVS, Whipple and Roots-style supercharger combinations
- Suitable for high-output turbocharged LS builds
- Compatible with properly matched factory and aftermarket intake manifolds
- Direct-replacement design with included adapter
- No internal components need to be transferred from the original throttle body
- Designed for smoother power delivery and cleaner throttle transitions throughout the RPM range
- Made in the USA
Tuning Notice: A tune may be required after installation for optimum idle quality, drivability, throttle response and driveline protection, particularly on heavily modified or forced-induction combinations.
Trailblazer SS: Trailblazer SS applications require custom calibration. Contact Granatelli before ordering to confirm the proper setup.
108mm Bore for Maximum Airflow
The 108mm throttle opening is designed for high-output LS combinations that require substantially more airflow than a factory throttle body can provide. Granatelli rates the GMTBLS108 at approximately 40% greater airflow at 7,000 RPM, helping reduce restriction in properly matched high-flow intake systems.
Built to Handle Up to 25 PSI
Forced-induction systems place significant pressure against the throttle blade. The GMTBLS108 uses a high-performance electronic motor engineered to maintain control under boosted conditions producing up to 25 psi, making it an excellent choice for serious supercharged and turbocharged LS combinations.
CNC-Machined 6061-T6 Billet Construction
The throttle-body housing is CNC-machined from high-grade 6061-T6 billet aluminum for strength, dimensional accuracy and durability. The result is a premium performance component built to withstand the airflow and operating demands of high-horsepower street and race engines.
Complete Plug-and-Play DBW Assembly
The GMTBLS108 arrives as a complete electronic throttle-body assembly. There is no need to transfer internal parts or electronics from your original unit. Compatible applications use the OEM-style GM 6-pin connector, and the required adapter is included for a straightforward installation.
Works with Factory & Aftermarket Intakes
Granatelli designed the GMTBLS108 to work with compatible factory and aftermarket intake manifolds, giving builders flexibility when designing high-flow induction systems. It is an excellent match for properly configured TVS, Whipple and Roots-style supercharger systems as well as naturally aspirated and turbocharged combinations.
Compatible GM LS Applications
Designed primarily for compatible high-performance GM LS applications using the appropriate OEM-style 6-pin Drive-By-Wire throttle-control system.
Popular Performance Applications
| Application | Typical Use |
|---|---|
| LS3 | High-flow naturally aspirated, supercharged and turbocharged combinations |
| LSA | High-output supercharged applications requiring increased inlet airflow |
| LSX | Large-displacement and high-horsepower custom engine combinations |
| TVS / Whipple / Roots | Compatible supercharger systems requiring a high-flow electronic throttle body |
| Turbo LS | High-boost applications requiring increased throttle-body airflow capacity |
Important Fitment Notice: GMTBLS108 is designed for compatible GM LS applications using an OEM-style GM 6-pin Drive-By-Wire throttle system. Engine family alone does not guarantee physical fitment. Verify your electrical connector, intake-manifold bolt pattern, throttle opening, required adapter and available clearance before ordering.
Tuning Notice: A tune may be required after installation to optimize idle quality, throttle response, drivability and engine performance.
Trailblazer SS: Trailblazer SS applications require custom calibration. Contact Granatelli before ordering.