Cobb 2015-2017 Subaru WRX NexGen Stage 2 + CAN Flex Fuel with SF Intake Power Package Silver | SUB004NG2W2-SL1FF Impreza_2008-2011 the narrowest section diameter is

the narrowest section diameter is D87

engineered to evenly distribute charge air from the turbocharger across the full intercooler core

you'll have

Polished Tips (Product pictures show Blue tips Version in 2nd image)

KTuner or Hondata might be required to disable any CEL due to the cat delete

Cobb 2015-2017 Subaru WRX NexGen Stage 2 + CAN Flex Fuel with SF Intake Power Package Silver | SUB004NG2W2-SL1FF Impreza_2008-2011 the narrowest section diameter isFitment Information: Subaru WRX 2015 2017 Included in this kit: cobb800200 Cobb OEM Chrome Badge cobb742110 Cobb 15 20 Subaru WRX Charge Pipe Kit cobbB42405 SL Cobb 15 18 Subaru WRX Top Mount Intercooler Silver cobbAP3 SUB 004 Cobb 15 21 Subaru STI & WRX 14 18 Forester XT AccessPORT V3 cobb745120 Cobb 15 21 Subaru WRX SF Intake System Black cobb343650 Cobb 15 17 Subaru WRX CAN Flex Fuel Upgrade (Module Harness Bracket Ethanol Sensor) cobb344750 Cobb