MST Performance Inlet Turbo Kit BMW S55 3.0 M2 M4 M3 Competition. Which vehicles does this fit? This kit is compatible with the vehicles listed in the compatibility section above. This is a performance enhancing turbo inlet kit for the BMW M2/M3/M4 Competition S55 3.0T engine. Cold air straight to the turbo charger. Enlarged diameter on the silicone hose. What Does It Do? This turbo inlet delivers increased air flow over the standard turbo inlets. Whether this kit is being installed to a standard vehicle or to a already tuned vehicle, you can be sure of the positive performance gains this will deliver. What Will I Get? MST Performance utilise the top quality components in all of their kits see below for what this kit will include. Full fitting kit with easy step by step instructions. We try our best to process all orders up to 2pm each weekday (excluding public holidays).