The 38mm measurement refers to the plumb back hose size. This BOV can be attached to intercooler piping via the supplied 38mm weld-on adaptor, or via a 38mm silicone hose. A profiled inlet flange adaptor can also be purchased to make welding to the intercooler piping a little easier &, neater (see related items).
Ideal for cars with sensitive Air-Flow systems and off-road applications as the fully-sealed design of the Plumb Back prevents any foreign matter entering the system.
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