45 Degree Transition Hose 3in I.D. to 4in

The 45 Degree Transition Hose 3in I.D. to 4in from Vibrant Performance is engineered for builders who demand seamless air intake and exhaust routing in custom engine bays. This precision transition hose bridges different diameter tubing systems—a common requirement when upgrading intake manifolds, turbo charge pipes, or custom radiator configurations. Whether you're building a street rod, turbocharged sedan, or high-flow engine swap, this angled connector eliminates the need for custom fabrication by providing a factory-quality transition at a 45-degree angle, saving time and ensuring consistent fit across repeated applications.

Vibrant Performance's design uses a stepped mandrel-bent construction that minimizes turbulence and maintains structural integrity under pressure and thermal cycling. The 3-inch inner diameter inlet transitions smoothly to a 4-inch outlet, allowing for proper velocity management in boost systems and intake tracts without creating restrictive flow restrictions. The hose features reinforced construction typical of Vibrant's lineup, engineered to withstand sustained boost pressure and elevated under-hood temperatures common in forced-induction and performance cooling applications. The 45-degree angle geometry is critical for packaging in tight engine bays where straight transitions won't fit, and the precise bend radius prevents kinking that could compromise flow dynamics or cause premature hose failure.

Professional mechanics and serious enthusiasts rely on this hose for intercooler piping, charge-air routing, and intake manifold connections where OEM components don't match custom configurations. At 1.03 lbs and compact enough for tight installations, it integrates seamlessly into both street and competition builds. Proper clamping with quality hose clamps on both ends ensures leak-free operation and maintains boost integrity—critical for tuned engines where even minor boost leaks degrade performance and responsiveness. This component pairs well with other Vibrant transition pieces and tuning components for builders executing comprehensive intake and cooling system overhauls.