There are no catalytic converters included with this car. Please check your local laws regarding registering a car without cats.just changed the oil and filter (BMW OEM) and spark plugs.4 new tires and 4-wheel alignment was performed.The list of mods is below:p style=margin:0 0 .0001pt;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;orphans:2;text-align:start;text-indent:0;text-transform:none;widows:2;word-spacing:0;-webkit-text-stroke-width:0;white-space:normal;background-color:fff;text-decoration-thickness:initial;text-decoration-style:initial;text-decoration-color:initial;font-size:medium;font-family:Calibri,sans-serif;color:000 class=MsoNormalp style=margin:0 0 .0001pt;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;orphans:2;text-align:start;text-indent:0;text-transform:none;widows:2;word-spacing:0;-webkit-text-stroke-width:0;white-space:normal;background-color:fff;text-decoration-thickness:initial;text-decoration-style:initial;text-decoration-color:initial;font-size:medium;font-family:Calibri,sans-serif;color:000 class=MsoNormal Turbos upgraded to .66 Garrett unitsp style=margin:0 0 .0001pt;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;orphans:2;text-align:start;text-indent:0;text-transform:none;widows:2;word-spacing:0;-webkit-text-stroke-width:0;white-space:normal;background-color:fff;text-decoration-thickness:initial;text-decoration-style:initial;text-decoration-color:initial;font-size:medium;font-family:Calibri,sans-serif;color:000 class=MsoNormal Darton sleevesp style=margin:0 0 .0001pt;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;orphans:2;text-align:start;text-indent:0;text-transform:none;widows:2;word-spacing:0;-webkit-text-stroke-width:0;white-space:normal;background-color:fff;text-decoration-thickness:initial;text-decoration-style:initial;text-decoration-color:initial;font-size:medium;font-family:Calibri,sans-serif;color:000 class=MsoNormal CP Carillo rods and pistonsp style=margin:0 0 .0001pt;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;orphans:2;text-align:start;text-indent:0;text-transform:none;widows:2;word-spacing:0;-webkit-text-stroke-width:0;white-space:normal;background-color:fff;text-decoration-thickness:initial;text-decoration-style:initial;text-decoration-color:initial;font-size:medium;font-family:Calibri,sans-serif;color:000 class=MsoNormal Half point lower compressionp style=margin:0 0 .0001pt;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;orphans:2;text-align:start;text-indent:0;text-transform:none;widows:2;word-spacing:0;-webkit-text-stroke-width:0;white-space:normal;background-color:fff;text-decoration-thickness:initial;text-decoration-style:initial;text-decoration-color:initial;font-size:medium;font-family:Calibri,sans-serif;color:000 class=MsoNormalspan style=fo