LSX HR 103mm Intake Manifold LS7 Rect.Port

The FAST Electronics LSX HR 103mm Intake Manifold LS7 Rect.Port is engineered for serious LS engine builders and performance enthusiasts who demand maximum airflow and precise fuel distribution. This rectangular-port intake manifold addresses the core requirement of any high-output LSX or LS7 platform: optimizing the critical air charge path from the throttle body to the cylinder head ports. Whether you're building a dedicated race engine, a turbocharged street machine, or a naturally aspirated performance combination, the correct intake manifold is non-negotiable—it directly influences peak horsepower, torque delivery, and engine responsiveness across your operating range.

FAST's HR series manifold features a 103mm bore diameter optimized for rectangular-port LS7 cylinder head architecture, ensuring efficient flow matching and minimal turbulence at high RPM. The manifold's design reduces low-speed vacuum requirements while supporting sustained boost and naturally aspirated engine speeds without flow restriction. Cast aluminum construction provides durability and thermal stability, critical for engines that see sustained wide-open throttle operation or forced induction abuse. The rectangular-port configuration maintains port velocity and scavenging characteristics that LS7 heads demand, preserving the cylinder head's native flow characteristics rather than compromising them with poorly matched transition geometry.

This manifold is ideal for dedicated LS7 engine swaps, purpose-built race engines, and high-horsepower street applications where every cubic foot per minute counts. Compatibility with LS7 rectangular-port heads is essential—incorrect manifold selection directly reduces peak power and erodes mid-range response. Installation requires verification of your cylinder head port configuration and confirmation that your fuel rail, throttle body, and intake plumbing align with the manifold's mounting points and passage diameters. Experienced LS engine builders will appreciate FAST's commitment to flow-matched, head-specific design that eliminates guesswork and delivers consistent results across your target RPM band.