Speedmaster 1-539-002 LS Throttle Body Adapter 102mm 4-Bolt to 96mm 3-Bolt

The Speedmaster 1-539-002 is a precision-engineered throttle body adapter designed to convert LS1 engines with 96mm 3-bolt throttle bodies to accommodate larger 102mm 4-bolt throttle bodies. This adapter enables significant airflow improvements for upgraded LS engine builds without requiring extensive modifications.

Key Features:

• Converts 96mm 3-bolt LS1 throttle body pattern to 102mm 4-bolt configuration
• Manufactured from aerospace-grade aluminum for superior strength and heat resistance
• Precision-machined bore ensures smooth airflow transition and minimizes turbulence
• Direct bolt-on installation for LS engine platforms
• Ideal for performance upgrades and forced induction applications

This adapter plate provides a reliable solution for enthusiasts upgrading to larger throttle bodies on LS-series engines, maintaining proper sealing and optimal air delivery to maximize performance gains.