Torque Solution VTA Blow Off Valve AdaptorThe Torque Solution blow off valve adapter was designed to give you that atmospheric blow off sound you're looking for on your turbocharged Subaru FA24 2. 4T engine. A simple bolt on modification that is compatible with the factory tune as it always partially recirculates and is completely reversible if you ever need to remove it. This adapter is user tunable by the 9 vent holes (3 per side), so you can adjust it to suit your sound preference by