The K&N 69-5317TS is a Typhoon-series cold air intake for the 1.6L four-cylinder Hyundai Elantra. It pairs a mandrel-bent aluminum intake tube with an oversized oiled cotton air filter. It replaces the factory air filter and intake tube, so the engine breathes through a smoother, straighter path. The manufacturer's estimate is a 15.4 HP gain at 5513 RPM. For buyers weighing a cheaper cold-air or drop-in filter, the difference is the tube and the filter element: the factory intake is replaced as one system, not bolted onto the stock box.
The main reason to pay for this kit over stock is the filter's service life. The manufacturer says the filter only requires cleaning every 100,000 miles under normal highway driving conditions, and the listed replacement element is RU-5147. Fitment is where buyers should slow down: the manufacturer lists the kit for the Hyundai Elantra L4-1.6L F/I, 2017-2018, while other sources vary, so confirm your VIN and engine code before ordering. On the install side, the manufacturer says a typical installation can be completed in 60 minutes or less with simple hand tools. Owners on user forums say the kit ships with DV and PCV hoses, which is worth checking against your existing setup.
The manufacturer lists the 1.6L F/I Elantra for 2017-2018. Other sources give different year ranges, so confirm the application for your specific car with the manufacturer before ordering.
The manufacturer states the kit is not legal for sale or use in California on any pollution-controlled motor vehicle. It is street legal in other US states.
The manufacturer says the washable oiled cotton filter can go up to 100,000 miles under normal highway driving before cleaning. The listed replacement element is RU-5147.
The manufacturer rates this kit as an easy-to-moderate DIY job, with a 60-90 minute install time. Tools listed are a wrench, extension, flat blade screwdriver, and Allen wrench. Because the kit replaces the factory intake tube and mounts a heat shield, plan for the mass airflow sensor to be unplugged and moved during the swap, and keep track of the hardware and hose clamps. After startup, the manufacturer's install sheets for other K&N applications recommend checking for air leaks at the connections before a test drive.
