Granatelli GM LS3 / LSA / LSX 108mm Billet Drive-By-Wire Throttle Body – GMTBLS108

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

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.