Granatelli GM LT1 / LT4 / LT5 112mm Black Billet Drive-By-Wire Throttle Body – GMTBLT112B

When a high-output Gen V LT engine needs serious airflow, a factory-size throttle body can become the restriction. The Granatelli 112mm billet Drive-By-Wire throttle body opens the intake path with massive airflow capacity, responsive electronic throttle control and a boost-ready design engineered for demanding LT1, LT4 and LT5 combinations.

The Granatelli GMTBLT112B 112mm Drive-By-Wire Throttle Body is precision CNC-machined from 6061-T6 billet aluminum and finished in black for a clean, aggressive appearance. Its massive 112mm bore is designed to increase airflow on naturally aspirated and forced-induction GM Gen V LT applications.

Designed to operate with the factory-style GM 6-pin electronic throttle connection, the GMTBLT112B provides a complete throttle-body assembly without requiring internal components to be transferred from the original unit. Its boost-ready design is engineered to handle up to 25 psi in both draw-through and blow-through forced-induction configurations.

112MM OF SERIOUS GEN V LT AIRFLOW.

LT1 • LT4 • LT5 • UP TO 25 PSI BOOST

Built for high-airflow naturally aspirated and forced-induction combinations, the Granatelli 112mm DBW throttle body gives serious Gen V LT builds the inlet capacity and electronic throttle control needed to support higher horsepower levels.

Key Features

• Massive 112mm throttle bore for increased airflow capacity
• Designed for compatible GM Gen V LT1, LT4 & LT5 applications
• Electronic Drive-By-Wire throttle control
• Factory-style GM 6-pin DBW connection
• Precision CNC-machined from 6061-T6 billet aluminum
• Black finish for an aggressive, premium appearance
• Designed for naturally aspirated and forced-induction applications
• Engineered to support up to 25 psi of boost
• Compatible with both draw-through and blow-through forced-induction configurations
• Larger bore helps reduce inlet restriction on high-airflow engine combinations
• Designed for improved throttle response and stronger high-RPM airflow
• Compatible with properly matched factory or aftermarket intake manifolds
• Complete electronic throttle-body assembly
• No need to transfer internal components from the factory throttle body
• Plug-and-play electrical connection on compatible applications
• Made in the USA

5.3L Application Notice: Compatible GM 5.3L applications require an aftermarket 6.2L-style intake manifold to use this throttle body. Verify your intake-manifold configuration before ordering.

Massive 112mm Airflow Capacity

High-output LT engines demand significantly more airflow than a stock combination. The 112mm throttle opening provides substantially more inlet area than smaller factory-style throttle bodies, helping reduce a potential restriction at higher RPM and airflow levels when paired with a properly sized intake manifold and induction system.

Built for LT1, LT4 & LT5 Performance

The GMTBLT112B is engineered around GM's modern Gen V LT engine architecture, making it an excellent choice for modified LT1 naturally aspirated combinations as well as high-output LT4 and LT5 forced-induction builds requiring a larger electronic throttle body.

Boost-Ready to 25 PSI

Forced-induction systems place significantly more demand on the throttle-body assembly. Granatelli designed the GMTBLT112B to handle up to 25 psi of boost in both draw-through and blow-through configurations, making it suitable for serious supercharged and turbocharged LT combinations.

Precision 6061-T6 Billet Construction

The throttle-body housing is precision CNC-machined from 6061-T6 billet aluminum for strength, accuracy and long-term durability. The black finish gives the GMTBLT112B a clean performance appearance that complements modern LT engine bays and custom builds.

Plug-and-Play GM Drive-By-Wire Control

The GMTBLT112B uses the factory-style GM 6-pin Drive-By-Wire connector on compatible applications. The complete electronic assembly means there is no need to disassemble the original throttle body and transfer its internal components.

Compatible GM Gen V LT Applications

Designed for compatible GM Gen V applications using the appropriate 6-pin electronic Drive-By-Wire throttle system. Primary engine families include:

*5.3L applications require a compatible aftermarket 6.2L-style intake manifold.

Popular Vehicle & Performance Applications

Important Fitment Notice: GMTBLT112B is designed for compatible GM Gen V LT applications using a GM 6-pin Drive-By-Wire throttle system. Verify your electrical connector, intake-manifold bolt pattern, throttle opening and available clearance before ordering.

5.3L Notice: Compatible 5.3L applications require an aftermarket 6.2L-style intake manifold.

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