Vibrant Aluminum Female V-Band Flange for 2.5" O.D. Tubing - 11490F 4.0" to 5.0" but they should fit with

but they should fit with most aftermarket stock-location headers and 3" j-pipe setups

But the devil is in the details

the COBB Focus RS Hard Pipe Kit removes restriction and improves airflow to the engine of your Focus RS

Every harness is machine-made and human checked so they are issue-free

With durable silicone couplers

Vibrant Aluminum Female V-Band Flange for 2.5" O.D. Tubing - 11490F 4.0" to 5.0" but they should fit withFlange OD: 3. 1875" Vibrant Performance individual v band flanges are constructed entirely from 304 stainless steel. They are available in diameters that support O. D. tubing ranging from 1. 5 to 5.