aFe 46-20378-B BladeRunner 2.5" Hot-Side Intercooler Tube for 15-21 Su

Vehicle Fitment

• 2015-2021 Subaru WRX (H4 2.0L Turbo)

Features

• BladeRunner performance hot-side intercooler tube designed to replace restrictive factory pipe
• Mandrel-bent 2.5" aluminum construction for smoother airflow and strength
• Outflows the stock intercooler tube by up to ~30 % to improve turbo efficiency
• CNC-machined inlet flange with O-ring seal for a leak-free connection
• 1/8" NPT port allows optional sensor or water/methanol injection connection
• Powder-coated wrinkle black finish for enhanced heat resistance and corrosion protection
• Premium stainless-steel spring-loaded T-bolt clamps and 5-ply silicone couplings included
• Direct-fit installation - no modifications required

Specifications

• Part Number: 46-20378-B
• Series: BladeRunner hot-side intercooler tube
• Tube Diameter: ~2.5" (63 mm)
• Material: TIG-welded aluminum
• Finish: Wrinkle black powder coat
• Fitment: Subaru WRX (H4 2.0L turbo) 2015-2021
• Port: 1/8" NPT for sensors/injection systems
• Installation: Direct OE-style fit

Included Components

• 1x BladeRunner hot-side intercooler tube (2.5")
• 2x 5-ply high-temp silicone couplings
• 2x Stainless-steel spring-loaded T-bolt clamps

Product Description

The aFe **46-20378-B BladeRunner 2.5" Hot-Side Intercooler Tube** is a high-performance replacement charge pipe engineered specifically for the **2015-2021 Subaru WRX** equipped with the **2.0L turbocharged flat-four engine**. This upgrade replaces the restrictive factory plastic intercooler tube with a **mandrel-bent aluminum tube** that significantly reduces airflow turbulence and pressure loss, resulting in improved turbo efficiency, quicker spool, and gains in horsepower and torque. The design can outflow the factory pipe by up to **~30 %**, helping your WRX breathe easier under boost.

Constructed from **TIG-welded aluminum** with a durable **wrinkle black powder-coat finish**, this intercooler tube includes **premium stainless-steel spring-loaded T-bolt clamps** and **heavy-duty silicone couplings** for a secure, leak-free installation - all without the need for modifications. A **CNC-machined inlet flange with an O-ring seal** ensures precise fitment and long-lasting performance, while the integrated **1/8" NPT port** offers flexibility for boost sensors or optional water/methanol injection systems. The result is a performance-oriented upgrade that enhances throttle response and turbo efficiency for spirited driving.