Speedmaster 1-539-003 LS 4 Bolt 102mm to LS 96mm 4 Bolt Throttle Body Adapter

The Speedmaster 1-539-003 throttle body adapter is designed to mate a 4-bolt 102mm throttle body to a 4-bolt 96mm LS intake manifold, allowing you to run a larger throttle body without replacing your existing intake. This bolt-on solution simplifies your LS engine build by bridging the size gap between common LS throttle body and manifold configurations.

Engineered for LS applications using standard 4-bolt throttle body flanges, this adapter offers a straightforward upgrade path for enthusiasts looking to maximize airflow potential on their LS-powered vehicle. Backed by Speedmaster's commitment to performance parts, it delivers a reliable, leak-free fit between your throttle body and intake manifold.