Univ. 2.5in. mtg. Flg. 5in. long

The K and N Engineering universal 2.5-inch mounting flange 5-inch long adapter is a precision engineered component designed for custom intake manifold and filtration system builds. This universal mounting solution serves mechanics and enthusiasts who are fabricating complex air intake systems, cold-air intake upgrades, or integrating aftermarket fuel injection components into modified engine bays. The flange adapter bridges incompatible port sizes and provides a secure, repeatable mounting interface where factory components no longer align with performance modifications.

Manufactured to K and N Engineering's exacting standards, this universal flange features a robust 2.5-inch bore diameter sized to accommodate mid-range intake piping without excessive turbulence or restriction. The 5-inch overall length provides adequate material for secure fastener engagement while maintaining a compact footprint in tight engine compartments common to modern vehicle designs. The mounting flange design allows for quick-disconnect or permanent installation depending on your build requirements, and the universal specification means compatibility across multiple platform swaps and engine configurations without requiring custom fabrication or welding modifications.

Engine builders, fabrication shops, and serious bolt-on enthusiasts benefit most from this adapter when transitioning between OEM and aftermarket air intake systems or when combining components from different manufacturers. Installation requires basic hand tools and proper port alignment to ensure leak-free operation under boost or vacuum conditions. The compact 4.6 x 4.6 x 7.4-inch package and lightweight 0.635-pound design make integration straightforward on most inline-four, V6, and V8 applications where intake manifold modifications are planned.