The Speedmaster 1-539-002 Throttle Body Adapter is engineered to bridge the gap between a 4-bolt 102mm throttle body and a 3-bolt LS1 96mm intake manifold, giving you the flexibility to mix and match LS-platform induction components without custom fabrication. This adapter simplifies throttle body upgrades on LS-based builds by providing a bolt-on solution that maintains proper alignment and airflow transition between the two differing bolt patterns and bore sizes.
Designed for enthusiasts and builders working within the LS engine family, this adapter eliminates the need for costly custom intake modifications when swapping to a larger 4-bolt throttle body on a 3-bolt LS1-style manifold. Trust Speedmaster's reputation for quality performance parts to deliver a precise, reliable fit that supports your induction upgrade goals.
