Granatelli GM LS / LSX 103mm Black Billet Drive-By-Wire Throttle Body – GMTBLS3B

Open up your LS intake system with more airflow and a clean black billet finish. The Granatelli 103mm Drive-By-Wire throttle body is built for serious street, strip and boosted LS combinations that need more inlet capacity without giving up modern electronic throttle control.

The Granatelli GMTBLS3B 103mm Drive-By-Wire Throttle Body is precision CNC-machined from 6061-T6 billet aluminum and finished in black for an aggressive high-performance appearance. Its large 103mm bore dramatically increases airflow capacity compared with smaller factory throttle bodies.

Designed for compatible GM LS and LSX applications, the GMTBLS3B works with a factory-style GM 6-pin Drive-By-Wire connector and can be used with factory or aftermarket intake manifolds when properly matched. Its boost-ready design is engineered for both naturally aspirated and forced-induction combinations.

103MM AIRFLOW. BLACK BILLET. BUILT FOR BOOST.

UP TO 25 PSI • DRAW-THROUGH OR BLOW-THROUGH

Granatelli's 103mm DBW throttle body is engineered to dramatically increase airflow while maintaining responsive electronic throttle operation on high-performance naturally aspirated, supercharged and turbocharged LS builds.

Key Features

• Large 103mm throttle bore for dramatically increased airflow
• Designed for high-performance GM LS & LSX applications
• Electronic Drive-By-Wire throttle control
• Uses a factory-style GM 6-pin DBW connector
• Precision CNC-machined from 6061-T6 billet aluminum
• Black finish for a clean, aggressive performance appearance
• Engineered to handle up to 25 psi of boost
• Suitable for both draw-through and blow-through forced-induction configurations
• Designed to improve engine response and drivability throughout the RPM range
• Direct-fit electronic design — no need to transfer internal components from the original throttle body
• Compatible with properly matched factory and aftermarket intake manifolds
• Excellent for naturally aspirated, supercharged and turbocharged LS builds
• Ideal for street, strip and high-horsepower performance applications
• Compatible with LS1, LS2, LS3, LS6, LS7, LS9, LSA, LSX, LQ4 and LQ9 applications when the correct DBW configuration is used
• Made in the USA

Tuning Notice: A tune may be required for proper electronic throttle operation, drivability and optimum performance, especially on highly modified or forced-induction combinations.

Trailblazer SS Applications: Trailblazer SS owners should contact Granatelli before ordering to confirm proper calibration requirements.

103mm Bore for Serious LS Airflow

As horsepower increases, the engine's demand for air increases with it. The 103mm throttle opening provides substantially more inlet area than smaller factory throttle bodies, helping reduce a potential restriction in high-flow intake systems and allowing compatible LS combinations to breathe more efficiently at higher RPM and load.

Boost-Ready to 25 PSI

The GMTBLS3B is engineered for serious forced-induction use and is rated to handle up to 25 psi of boost. It can be used in both draw-through and blow-through configurations, making it a strong choice for supercharged and turbocharged LS combinations.

Precision 6061-T6 Billet Construction

Each GMTBLS3B is CNC-machined from high-grade 6061-T6 billet aluminum for strength, accuracy and durability. The black finish gives the throttle body a clean, understated appearance while maintaining the premium construction expected on a serious performance engine.

Complete Drive-By-Wire Operation

The GMTBLS3B is designed to bolt on without requiring internal components to be transferred from the factory throttle body. Compatible applications use the factory-style GM 6-pin connector, retaining electronic throttle control while increasing available airflow.

Works with Factory & Aftermarket Intake Manifolds

The 103mm Granatelli throttle body can be used with compatible factory or aftermarket intake manifolds, giving builders flexibility when designing naturally aspirated, supercharged or turbocharged LS induction systems. Always verify throttle opening, bolt pattern and available clearance before installation.

Compatible GM LS & LSX Applications

Designed for compatible GM LS applications using the appropriate 6-pin Drive-By-Wire throttle-control system. Granatelli lists compatibility with:

Popular Performance Applications

Important Fitment Notice: GMTBLS3B is designed for compatible GM LS and LSX applications using a GM 6-pin Drive-By-Wire throttle-control system. Engine family alone does not guarantee fitment. Verify your electrical connector, intake-manifold bolt pattern, throttle opening and available clearance before ordering.

Tuning Notice: A tune may be required after installation to optimize throttle response, drivability and engine performance, particularly on modified or forced-induction combinations.

Trailblazer SS: Trailblazer SS applications require calibration consideration. Contact Granatelli before ordering to confirm proper setup.