Full Race 90 degree couplers feature a high flowing yet tight radius. They are a must when space is limited!  Our 2.5" silicone 45degree couplers solve the problem of connecting a 2.0" turbo outlet to a 2.5" charge pipe in tight space confines - and remain easily serviceable.  Constructed from 4 ply silicone with a .110 wall thickness, they are extremely durable and withstand blowing-off or tearing due to engine movement and heat expansion.