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Quick Tech: K&N Intake Install & Dyno, 2013 Lexus IS F

Easy peezy induction upgrade and the photos and graphs to prove it

Mark Gearhart
Oct 26, 2016
Photographer: Scott Gearhart

For many enthusiasts, a cold-air intake or exhaust system is among the first upgrades made to a ride. Regardless if it’s 1996 or 2016, we can all probably remember the first time we installed one. The grumble under full throttle on naturally aspirated cars, or the “whooshing” sound on turbo vehicles - it gave us the sound and (some of) the power we wanted.

Case in point for our 2013 Lexus IS F; the dual overhead cam 5.0-liter 2UR-GSE V8 already sounds beautiful but we wanted to accentuate that sound and power up our 8-pot beast. To fill the void we ed K&N for their 69-8703TS Typhoon Intake System.

  |   Kn Typhoon Cold Air Intake Fits 2008 2012 Lexus Is F 50 V8 Copy

The K&N 69-8703TS Typhoon air intake system is a free-flowing, mandrel-bent aluminum tube air induction system. The factory air filter and air intake housing are replaced by the K&N Typhoon air intake, which comes with a titanium topped K&N high-flow air filter and a heat shield that installs into the previous air box space.

We took our IS-F to Coastal Chassis Dyno in Tampa, Florida for our before dyno test, install, and after dyno test. We even performed the install with the car still strapped on the dyno, which was straightforward and took us a little over an hour to complete.

  |   Before

On a Mustang Dyno the IS-F put down a respectable 357 horsepower and 343 lb.-ft. of torque to the rear wheels.

  |   Engine Covers Off

The first disassembly items include the engine cover and the front plastic cover.

  |   Remove Air Intake Assembly

Pop the clips off that hold the fresh air scoop to the core support, strut tower cover clips, crankcase vent hoses, and the air intake assembly.

  |   Plastic Bits

Most of the install time is removing the decorative plastic covers that make the engine bay look clean.

  |   MAF

Transfer the mass airflow sensor (MAF) into the K&N air intake. The sensor only goes in one way so it’s impossible to install backwards (famous last words – Ed.)

  |   Solenoid

The factory intake system uses a vacuum actuated solenoid that opens a secondary door for the intake system. This will no longer be used and will be reinstalled with a vacuum plug.

  |   Heat Shield

With the heat shield prepped with the weather stripping and filter adaptor, it bolts in place with existing mounting points.

  |   Couplers

The silicone couplers adapt the intake tube from the throttle body to air filter. The existing crankcase vents fit back in place without any modifications.

  |   Solenoid Installed

The solenoid we talked about earlier bolted in place and the vacuum cap installed.

  |   Complete

All done! The K&N Typhoon Intake System fits perfectly into our IS-F’s engine bay with ease and only a few hand tools.

  |   Before After

Gains were impressive just for an intake install - 375 horsepower and 350 lb-ft of torque, a gain of 18 horsepower and 7 lb.-ft. of torque. If you look at the torque curve at about 5,900 rpm, the IS-F is producing 20 lb.-ft. more than stock.

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By Mark Gearhart
19 Articles

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