Fabricated Airflow for Serious LS Power

JEGS fabricated intake manifolds for GM Gen III/IV LS engines that deliver the airflow capacity and durability demanded by modern high-performance builds. Constructed from fabricated aluminum for strength and consistent airflow, these manifolds are engineered to support cathedral or rectangular port LS cylinder heads while accommodating large throttle bodies for increased air volume and throttle response. Designed for street, strip, and forced-induction combinations alike, the optimized runner and plenum design helps maintain strong power across a broad operating range while supporting upgraded fuel systems and engine management components. Whether you're building a naturally aspirated performance engine or a boosted LS swap, JEGS fabricated intake manifolds provide the airflow foundation needed for reliable horsepower and consistent performance.