Granatelli GM LS3 / LSA / LSX 103mm Cast Drive-By-Wire Throttle Body – GMTBLS3M

Give your LS build the airflow it needs without stepping all the way up to a premium billet throttle body. The Granatelli 103mm Race Drive-By-Wire throttle body combines a massive bore, high-performance electronic throttle control and durable cast-aluminum construction for serious naturally aspirated and boosted combinations.

The Granatelli GMTBLS3M 103mm Drive-By-Wire Throttle Body features a large 103mm bore and precision-machined high-grade cast-aluminum construction. It is designed for high-performance GM LS and LSX applications that need substantially greater airflow than a factory-size throttle body can provide.

A powerful electronic throttle motor is engineered to maintain stable throttle operation under demanding conditions, including forced-induction combinations producing up to 35 psi of boost. The GMTBLS3M uses a factory-style GM 6-pin Drive-By-Wire connector and includes the required adapter for compatible installations.

103MM RACE AIRFLOW. BUILT FOR SERIOUS BOOST.

103MM BORE • UP TO 35 PSI BOOST CAPABILITY

Built for aggressive LS and LSX combinations, the GMTBLS3M delivers significantly increased airflow with a powerful electronic motor designed to maintain throttle control in demanding naturally aspirated and boosted applications.

Key Features

• Large 103mm throttle bore for increased airflow capacity
• Designed for high-performance GM LS & LSX applications
• Race-oriented Drive-By-Wire throttle body
• Factory-style GM 6-pin DBW connection
• Precision-machined from high-grade cast aluminum
• High-performance electronic throttle motor
• Engineered to handle up to 35 psi of boost
• Designed to resist throttle flutter and unwanted blade movement under boost
• Larger bore helps improve airflow throughout the RPM range
• Designed for crisp, controlled electronic throttle response
• Excellent for naturally aspirated, supercharged and turbocharged LS combinations
• Compatible with properly matched factory and aftermarket intake manifolds
• Excellent for TVS, Whipple and Roots-style supercharger applications
• Supplied adapter included for compatible installations
• Direct-replacement electronic design
• No need to transfer internal throttle-body components from the original unit
• Made in the USA

Tuning Notice: A tune may be required after installation for proper electronic throttle operation, idle quality, drivability and optimum engine performance.

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

103mm Bore for Serious LS Airflow

As horsepower increases, the factory throttle body can become a restriction in the induction system. The 103mm throttle opening provides substantially more airflow capacity for properly matched LS combinations, helping support increased engine demand at higher RPM and load.

Engineered for Up to 35 PSI of Boost

The GMTBLS3M is designed for more than basic bolt-on performance. Its electronic motor is engineered to maintain throttle control with up to 35 psi of boost, helping prevent throttle flutter, unwanted blade movement or throttle-control failure during demanding forced-induction operation.

High-Grade Cast-Aluminum Construction

The GMTBLS3M uses a precision-machined cast-aluminum body designed to provide excellent strength, accurate fitment and reliable performance. It delivers the high-flow benefits of Granatelli's 103mm throttle-body platform in a cost-effective race-oriented construction.

Smooth, Controlled Throttle Response

A larger throttle body is only useful if the electronics can control it properly. Granatelli combines the 103mm bore with a powerful electronic motor engineered to provide smooth, controlled throttle movement throughout the RPM range while supporting substantially increased airflow.

Factory & Aftermarket Intake Versatility

The GMTBLS3M can be used with compatible factory or aftermarket intake manifolds and is an excellent option for high-flow induction combinations using TVS, Whipple or Roots-style superchargers. Always verify the throttle opening, mounting pattern and available clearance for your specific intake configuration.

Compatible GM LS Applications

Designed primarily for high-performance GM LS and LSX combinations using the appropriate GM 6-pin Drive-By-Wire throttle-control system.

Popular Performance Applications

Important Fitment Notice: GMTBLS3M is designed for compatible GM LS and LSX applications using a GM 6-pin Drive-By-Wire throttle-control system. Engine displacement alone does not guarantee fitment. Verify your electrical connector, intake-manifold bolt pattern, throttle opening, supplied-adapter requirements and available clearance before ordering.

Tuning Notice: A tune may be required after installation to optimize throttle response, idle quality, drivability and engine performance.

Trailblazer SS: Trailblazer SS applications require specific calibration. Contact Granatelli before ordering.