GM LS Intake Manifold Split Design LS1/LS2/LS6

The GM LS Intake Manifold Split Design LS1/LS2/LS6 from Holley is purpose-built for serious LS engine builders seeking improved airflow dynamics and thermal management. This split-design manifold addresses a critical bottleneck in factory intake geometry, making it essential for builders upgrading fuel injection systems, cam profiles, or cylinder head flow rates. Whether you're restoring a C5/C6 Corvette, LS-swapping a street rod, or maximizing power output in a modified Camaro, this intake manifold delivers the flow characteristics modern LS platforms demand.

The split-design architecture uses dual runner paths that reduce turbulence and reversion, allowing better cylinder-to-cylinder fuel charge distribution compared to traditional single-plane designs. Holley engineered this manifold with optimized plenum volume and runner sizing to support LS1, LS2, and LS6 variants, accommodating both naturally aspirated and forced-induction setups. The aluminum construction provides excellent thermal stability while keeping rotating assembly weight minimal—a critical factor when targeting consistent EFI tuning across the full RPM range. Precision porting and smooth internal transitions minimize flow separation losses, translating to measurable gains in volumetric efficiency.

This manifold proves invaluable for enthusiasts running aftermarket EFI systems, high-lift camshafts, or ported cylinder heads where factory intake velocity becomes the limiting factor in horsepower development. LS1-based engines (1997–2004) benefit from improved scavenging; LS2 applications (2005+) gain better idle quality and part-throttle response; LS6 race builds unlock full peak-RPM potential. Installation requires standard LS valley gasket procedures and compatible fuel rail setup—verify your fuel injection system supports this manifold's intake port configuration before purchase. The 21.53 lb weight and compact 15 x 10 x 23-inch footprint fit most engine bay layouts without modification, making this an efficient upgrade path for both restoration and performance builds.