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.

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.

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. Its aluminum construction provides excellent thermal stability while keeping rotating assembly weight minimal, which is critical for consistent EFI tuning across the full RPM range.