The plastic intake manifold constantly flexes under normal driving conditions. Over time, the flange will compress and deform causing vacuum leaks at the turbo. This leads to dangerous engine conditions and check engine lights. The PERRIN Turbo Inlet Hose for 2015-2018 WRX remedies this by using a CNC billet flange (and OEM O-ring) and a large silicone hose to connect the turbo to your intake system. This eliminates the potential for vacuum leaks while increasing performance.
The OEM Subaru turbo inlet hose is smaller than the inlet of the turbo, causing an unnecessary restriction for the turbo's intake. The CNC machined flange of the PERRIN Turbo Inlet Hose has a built-in velocity stack that perfectly matches the turbo's inlet, allowing for smoother and unrestricted air flow to the turbo.
The PERRIN Turbo Inlet Hose has a 3.0" internal diameter compared to 2.6" found in the OEM part. This allows for a greater amount of air to smoothly enter your engine with virtually no restriction. This larger diameter will easily support all bolt on modifications and increased boost levels.
The PERRIN Turbo Inlet Hose is perfectly smooth on the inside. The OEM turbo inlet has sharp bends, corrugated ribbing, and strange pockets, all of which disturb airflow. The PERRIN Turbo Inlet Hose is much smoother, with more gradual bends toward the turbo making for less restriction leading to increased horsepower and improved acceleration.
The PERRIN Turbo Inlet Hose is reinforced with a stainless steel support wire that is embedded within the silicone layers. The support adds rigidity to the hose and prevents collapses when used with restrictive filter elements and high horsepower setups.
Not only does the PERRIN Turbo Inlet Hose provide superior airflow from your intake for increased power and throttle response, it will look great doing so. The clean and smooth look of the hose will help to clean up your engine bay.
PSP-INT-424BK = 2015-2018 WRX, Black
PSP-INT-424RD = 2015-2018 WRX, Red
(1) PERRIN Turbo Inlet Hose
(1) PERRIN Turbo Inlet Adapter
(1) 52 Clamp
(1) 48 Clamp
(1) 20 Clamp
(5) 6 Clamp
(1) 3/8"-3/8" 90 Degree connector
(1) 3/8" x 3/8" Hose
(1) 5/8" x 5/8" Hose
(1) M6 x 20 Socket cap screw stainless steel with black anodize
(1) M5 Short arm hex key
(2) Zip ties
(1) PERRIN License Plate Frame
Warranty, instructions, stickers
NO TUNING REQUIRED
2015-2018 WRX - Yes
2002-2014 WRX - No
2004-2018 STI - No
PERRIN Performance warrants to the original purchaser that all PERRIN products will be free from defects in material and workmanship within a sixty (60) month period from the date of purchase. *Some exclusions apply
WARNING: This product can expose you to chemicals which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov
NOTE: This item may be for off-road use only in your area. See Terms and Conditions prior to ordering!
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