aFe POWER has a 77-47001 in-line SCORCHER GT Tuner Module and a 49-37002-L axle back for 2018 Hyundai Elantra Sport I4-1.6L (turbo), via Marken Performance. Expect gains of +45 HP & + 60TQ with purchase of both.  

   aFe SCORCHER GT modules uses high quality aluminum extrusion black powder-coated enclosure casing and factory style connectors which requires no modification to your factory harness. These factory style connectors, plugs directly into the stock wiring harness connectors and sensors with no trace on ECU (No Footprint). The 4-Power settings are adjustable with one button in-cabin on-the-fly Power adjustments and the LED light represent the settings: Stock (Green), Sport (Yellow), Sport+ (Orange) and Race (Red) . This performance module increases turbo boost. It improves vehicle performance and throttle response. 

   The axle back is a 3" to 2x2-1/2" mandrel-bent, 304 stainless steel tubing with mitered merge collector for increase exhaust velocity. Part # 49-37002-L has 4” blue tips, # 49-37002-B has black tips and # 49-37002-P has polished tips.  Pic below is a poor rendering of blue tips.