Vibrant 14331D Exhaust Manifold Flanges GM LT1 Small Block D-Port

Vibrant Performance 14331D exhaust manifold flanges are precision-engineered for GM LT1, L98, and LB9 small block engines with D-port configuration. These heavy-duty flanges provide a robust foundation for building custom exhaust manifolds and headers with professional-grade reliability.

Key Features:

• Constructed from premium T304 stainless steel for superior corrosion resistance and durability
• 3/8-inch thick material ensures flatness and prevents warping under extreme heat
• Laser cut and CNC machined for precise port alignment and leak-free sealing
• D-port configuration matches GM LT1, L98, and LB9 small block exhaust port geometry
• Sold in pairs for complete left and right side installation

Ideal for custom exhaust fabrication, turbo manifold builds, and header construction where precision fitment and long-term durability are essential. The thick stainless construction maintains gasket compression and resists the thermal cycling that causes thinner flanges to fail.