Granatelli Motor Sports GMTBLTSPC LT Series 103mm Throttle Body Adapter Spacer Plate with Hardware

The Granatelli Motor Sports GMTBLTSPC is a precision-machined billet aluminum LT Series adapter plate that allows Granatelli's 103mm throttle body to be installed directly onto a stock LT1 or LT4 intake manifold — or a non-ported LT4 supercharger snout — without requiring any porting or machining of the factory components.

This spacer is the essential companion piece for builders who want the full airflow benefits of the Granatelli 103mm throttle body (sold separately) while retaining their factory intake manifold. It bridges the size difference between the larger 103mm throttle body bore and the stock manifold opening, ensuring proper fitment, alignment, and sealing.

Key Features:

• Enables installation of Granatelli's 103mm LT-series throttle body on stock LT1 or LT4 intake manifolds
• No porting or manifold modification required
• Compatible with factory intake manifolds and non-ported LT4 supercharger snouts
• Precision-machined from aircraft-grade billet aluminum for durability and accurate fitment
• Includes all necessary mounting hardware

Important Notes:

• Throttle body (sold separately) — this listing is for the adapter spacer plate only
• Tuning is recommended after installing an upgraded throttle body
• Not legal for use on emissions-controlled vehicles in California or states with similar regulations