BJ 15849-Coupling Kit: 3-1/8"ID x 4-1/2"L Bellows w/ Port Holes (Silicone)
BJ 15849-Coupling Kit: 3-1/8"ID x 4-1/2"L Bellows w/ Port Holes (Silicone)
BJ 15849-Coupling Kit: 3-1/8"ID x 4-1/2"L Bellows w/ Port Holes (Silicone)
BJ 15849-Coupling Kit: 3-1/8"ID x 4-1/2"L Bellows w/ Port Holes (Silicone)
BJ 15849-Coupling Kit: 3-1/8"ID x 4-1/2"L Bellows w/ Port Holes (Silicone)
BJ 15849-Coupling Kit: 3-1/8"ID x 4-1/2"L Bellows w/ Port Holes (Silicone)
BJ 15849-Coupling Kit: 3-1/8"ID x 4-1/2"L Bellows w/ Port Holes (Silicone)
BJ 15849-Coupling Kit: 3-1/8"ID x 4-1/2"L Bellows w/ Port Holes (Silicone)

BJ 15849-Coupling Kit: 3-1/8"ID x 4-1/2"L Bellows w/ Port Holes (Silicone)

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3-1/8 IN Internal Diameter:
This 4-1/2 IN long coupling is designed to connect to a tube with a 3-1/8 IN diameter. It's commonly used on BOOST cold air intake systems, but can be used for a variety of projects.

Flexible Bellows Silicone:
Its bellows design is extremely flexible, making it easy to install, even when dealing with misaligned tubes. It allows for ample expansion, movement and vibration in-between two hard pipes. The built-in port holes (5/8 IN ID x 1 IN H and 3/16 IN ID x 1/2 IN H) allow for easy connection to PCV lines.