Vibrant Standard Flex Coupling w/ Inner Braid Liner, 3.00" I.D. x 4.00" Long - 63004 Smoke This bellmouth is added because

This bellmouth is added because it increases the efficiency of air moving through the pipe by as much as 70% in the right situations

The OEM piece is made from flexible plastic and utilizes soft bushings

overall gauge depth and 0

Much of this is difficult to quantify

Pins & Wire Seals

Vibrant Standard Flex Coupling w/ Inner Braid Liner, 3.00" I.D. x 4.00" Long - 63004 Smoke This bellmouth is added becauseVibrant Performance Standard Flex Couplings with Inner Braid Liner provide smooth flow while retaining flexibility in the coupling itself. The Inner Braid protects the Bellows from premature failure due to high temperature exhaust gas exposure, and is ideal for eliminating whistling caused by high velocity flowing media.