Intake Port Seals (8pk) LS3/LSXr

The FAST Electronics Intake Port Seals 8-pack for LS3/LSXr intake manifolds are essential gasket components designed to prevent vacuum leaks and coolant seepage at the critical junction where your intake ports meet the cylinder head. These seals are a foundational upgrade for any LS engine builder or enthusiast performing intake manifold installation, porting work, or routine maintenance.

Proper port sealing is non-negotiable for reliable idle quality, accurate fuel mapping, and long-term cooling system integrity. Engineered to withstand the thermal cycling and pressure demands of modern LS architecture, these intake port seals ensure complete sealing without gaps that could compromise vacuum integrity or allow coolant weeping into intake passages.

This eight-pack is ideal for LS engine swaps, intake manifold upgrades, cylinder head work, or any situation where the intake manifold must be separated from the engine. Professional engine builders and experienced DIY mechanics alike rely on these OEM-quality port seals for maintaining precise gasket crush and preventing marginal leaks that can degrade drivability over time.