Stainless Downpipe Elbow 90° Holset Turbo HY35 HX HE351 V-band Flange Clamp USAStainless Downpipe Elbow 90 Holset Turbo HY35 HX HE351 W 4. 375" V band Flange Clamp USAV Band clamp and stainless gasket are included with the downpipe elbow as shown everything in the first picture is included. Elbow has a threaded bung in it for an oxygen (O2) sensor. An excellent starting point for anyone installing one of these turbos and having a hard time finding the proper clamp and flange to build their downpipe. Easily attach your next