Holley EFI 300-248 Cast Aluminum 4500 Flange Throttle Body Elbow for LS Engines

The Holley EFI 300-248 is a cast aluminum intake elbow designed to adapt 105mm throttle bodies with the industry-standard 4500 flange pattern to GM LS engine intake manifolds. This precision-engineered adapter features a 100-degree mounting angle and provides flexible throttle body orientation for tight engine bay installations.

Key Features:

• Cast aluminum construction with natural finish for excellent heat dissipation
• 105mm throttle body opening accommodates large-bore throttle bodies
• 4500 square flange pattern allows forward, sideways, or rearward throttle body mounting
• 100-degree mounting angle optimizes airflow and packaging
• LS3-style MAP sensor mounting provision included
• Two throttle linkage mounting bosses for versatile linkage routing
• Four vacuum ports: one 1/4" NPT, one 3/8" NPT, and two 1/8" NPT for accessories
• Includes O-ring for reliable sealing to 4500-style intake manifolds
• Overall height: 6.4 inches

This elbow is ideal for LS engine swaps and performance builds requiring a 4500-flanged intake manifold with modern EFI throttle body compatibility. The multiple vacuum ports eliminate the need for additional fittings, while the integrated MAP sensor boss keeps your installation clean and professional.