AEM Wrinkle Black Cold Air Intake Subaru WRX STI 2015-2017


AEM 15-17 Subaru WRX STi 2.5L H4 – Cold Air Intake System – Wrinkle Black


This cold air intake produced an amazing estimated 32 horsepower maximum increase at the wheels of an otherwise stock Subaru WRX STi. Dyno testing on the 21-735WR cold air intake was performed to back AEM’s substantial claims of increased horsepower. AEM dyno tests prove that CAI, number 21-735WR, produced an estimated maximum gain of 32 horsepower @ 5400 RPM and an estimated increased in torque of 31 ft-lbs @ 5400 RPM.

The AEM cold air intake for the 2015 Subaru WRX STi positions the AEM Dryflow Air Filter in a location near the front of the car to help pull fresh air from outside the engine compartment. Bringing in cooler outside air can result in more power. The AEM synthetic Dryflow air filter is designed for low restriction without compromising engine protection. The 21-735WR 2015 Subaru WRX STi cold air intake Dryflow filter is washable and reusable. An AEM dry filter uses a synthetic filter media and does not require oil allowing for quick, easy cleaning. An application specific powder coated aluminum heat shield is included in the AEM CAI for the 2015 STi to help prevent engine heat from increasing the inlet air temperature.

A mandrel bent aluminum air intake tube is utilized to direct cool intake air smoothly from the AEM Dryflow filter and into the turbocharger. This aluminum intake tube is protected by a wrinkle-red powder coat finish to ensure the AEM cold air intake will look just as good as it performs. The wrinkle-red powder coat finish was chosen in order to match original equipment parts visible under the hood of 2015 Subaru WRX STi models. The entire AEM cold air intake, as well as the AEM Dryflow air filter is backed by the AEM limited lifetime warranty.

Benefits of AEM Cold Air Intake Systems

Improved Power Gains

Improved Throttle Response

Enhanced Engine Sound

DryFlow Oil-free Synthetic Filter Media

Washable/Reusable Air Filter

Up to 100,000 miles of use before cleaning needed

Incredibly Easy to Clean

Lifetime Limited Warranty

SKU: 21-735WB

Vendor: AEM Induction

Additional information

SKU 21-735WB
Carb Compliance Yes
Prop 65 Yes
EPA Approved N/A
Weight 8.4 lbs
Dimensions 19.6 × 12.6 × 12.4 in