Turbo Clamps & Hardware

Turbo clamps and flange adapters hold a turbo’s housings to its centre section and join the turbo and its wastegate to the manifold and exhaust pipes. This section holds V-band clamps for wastegate inlets and outlets, housing clamps for large-frame turbos, and adapters that convert one turbine flange standard to another.

A V-band joint uses two flanges with tapered outer faces. The band has a V-shaped inner profile, so tightening its single bolt draws it smaller and wedges the flanges together with even pressure all the way round. The joint can be set at any angle and opened quickly, which suits wastegates and turbines that need clocking or regular removal. Many V-band joints seal metal to metal, so the faces must be clean, flat and undamaged.

Match each part to its position and flange:

• Wastegate clamps: V-band clamps listed by gate size, side and generation. One clamp serves a 40 mm inlet or a 45 mm outlet, while 50 and 60 mm gates have separate inlet and outlet clamps.
• Housing clamps: for joining the compressor cover or turbine housing of a large-frame turbo to its centre section. Turbine clamps are listed by inner diameter, 111.7 mm for a T4 and 127 mm for a T6 housing.
• Flange adapters: compact adapters that mate a V-band turbine inlet with a T25, T3 or T4 flange. The T25 version comes as a clamp alone or as a flange and clamp kit.
• Elbow adapter: a 90° stainless steel elbow between a T3/T4 flange and a 3″ V-band, which turns the flow through a right angle to help position the turbo. Used the other way round, from a V-band turbine to a T3/T4 manifold, it needs a length of tube welded between the flanges.

Coat the clamp bolt’s thread with high-temperature anti-seize. Tighten in stages while tapping round the band so it seats evenly, as overtightening can stretch or distort it. Check the clamp again after a few hot runs, and replace any band that is cracked, stretched or out of shape. An adapter adds height and weight, so check clearances, and brace the turbo or downpipe where needed to keep the load off the flanges.