The K&N 69-5321TS is a Typhoon short ram intake for the 2.4L four-cylinder in the Hyundai Sonata, built around a silver, mandrel-bent aluminum intake tube. The manufacturer positions the system as a way to gain a guaranteed increase in horsepower and torque. The published figure is an estimate of 5.8 HP @ 5998 RPM, so treat it as a projection rather than a guaranteed dyno result. Compared with a stock airbox, the appeal is a freer-breathing intake tube and a washable filter, not a paper element you keep replacing. Each system is paired with a washable, reusable High-Flow Air Filter featuring oiled cotton filter media. Owners on user forums who tested it on a 2015-2018 LF Sonata 2.4L called it pricey but said it beat a homemade setup. The manufacturer also notes it is not legal for use on this vehicle in California, so check CARB status before buying.
This kit is aimed at buyers searching for a 2015-2019 Sonata 2.4L cold air intake, LF Sonata short ram intake, or Typhoon intake with a silver aluminum tube. The manufacturer lists the application as HYUNDAI SONATA L4-2.4L F/I, 2015-2019, which is broader than the 15-18 wording in the title, so confirm your model year and trim before ordering. For installation, owners on user forums say the kit includes the air tube, connections for the vacuum and pcv lines, heat shield and couplers. One owner described the fitting as a bit of a pain to install but the result is worth the effort.
The manufacturer lists the Typhoon kit for the Hyundai Sonata L4-2.4L F/I from 2015 through 2019. The product title says 15-18, so confirm your exact year and trim with the manufacturer before ordering.
The manufacturer states that this system is not legal for use on this vehicle in California.
Some owners on user forums caution that oil from oiled filters can contaminate the mass airflow sensor's hot wire, and they recommend careful re-oiling. The manufacturer's guidance on this point was not confirmed in our research, so check the manufacturer's maintenance instructions.
Owners on user forums describe this as a moderately involved install rather than a quick bolt-on, with the stock airbox and tube removal being the most time-consuming part. Expect to reconnect the vacuum and PCV lines and to seat the heat shield and couplers carefully so the tube does not leak. Because the filter is oiled, keep the filter lightly oiled and avoid over-oiling, which some owners on user forums say can foul the MAF sensor. Confirm the tool list and torque specs against the manufacturer's installation sheet before you start.
