Upgrade to a 103mm throttle body without permanently porting your factory LT intake manifold. The Granatelli GMTBLTSPC adapter spacer provides the proper transition and mounting surface needed to pair a compatible 103mm throttle body with select GM LT1 and LT4 intake systems.
The Granatelli GMTBLTSPC 103mm Throttle Body Adapter Spacer Plate is precision-machined for compatible GM Gen V LT1 and LT4 applications. It is specifically designed for installations where a larger 103mm throttle body is being used with a factory-style intake manifold or non-ported supercharger inlet.
Rather than permanently modifying the factory manifold opening, the GMTBLTSPC provides the proper adapter interface for a cleaner and more straightforward 103mm throttle-body installation.
GO 103MM WITHOUT PORTING YOUR FACTORY MANIFOLD.
103MM THROTTLE BODY ADAPTER • LT1 & LT4
Designed to bridge the difference between a larger 103mm throttle body and compatible factory-style LT intake openings for proper alignment and installation.
Key Features
- 103mm throttle body adapter / spacer plate
- Designed for compatible GM LT1 & LT4 applications
- Allows installation of a compatible 103mm throttle body on select factory-style intake manifolds
- Helps eliminate the need to permanently port the factory intake manifold opening
- Provides proper throttle-body alignment and mounting interface
- Ideal for factory intake manifolds and compatible non-ported supercharger applications
- Precision-machined billet aluminum construction
- Designed for performance street and race applications
- Excellent companion part for Granatelli 103mm LT-series throttle bodies
- Simple bolt-on installation when used with compatible components
- Made in the USA
Adapter / Spacer Only: This product is not a throttle body. The listing includes the throttle-body adapter/spacer plate only. Throttle body and intake manifold are sold separately.
Install a 103mm Throttle Body Without Porting
A 103mm throttle body can have a larger opening than the factory LT intake-manifold inlet. The GMTBLTSPC creates the proper transition between the two components, allowing compatible 103mm throttle bodies to be installed without permanently opening or porting the factory manifold.
Designed for LT1 & LT4 Performance Builds
The GMTBLTSPC is an ideal supporting component for modified Gen V LT applications upgrading to a larger throttle body while retaining the factory-style intake manifold or compatible non-ported supercharger inlet.
Compatible GM Applications
Designed for compatible GM Gen V applications using a 103mm throttle body with the appropriate factory-style intake configuration.
Important Fitment Notice: GMTBLTSPC is intended for compatible LT1/LT4 applications using a 103mm throttle body with a factory-style intake manifold or compatible non-ported supercharger inlet. Verify your throttle-body diameter, intake-manifold opening and bolt pattern before ordering.
Please Note: This is an adapter/spacer plate only and does not include the throttle body or intake manifold.