aFe Power 48-36803 Twisted Steel Long Tube Exhaust Headers 02-21 Subaru H4/2

Vehicle Fitment

• 2002-2014 Subaru Impreza (WRX & AWD variants with 2.0L or 2.5L engines)
• 2005-2013 Subaru Legacy (2.5L engines)
• 2012-2016 Subaru WRX (2.5L)
• 2015-2021 Subaru WRX STI (2.5L)

Features

• Twisted Steel long tube header design for improved exhaust flow
• Mandrel-bent 304 stainless-steel tubing (1.625" primary diameter)
• Unequal tube lengths to enhance exhaust scavenging and Boxer engine sound
• Laser-cut flanges for precise fit and leak-free sealing
• 100% TIG-welded construction for strength and durability
• Collectors and tubing designed to increase exhaust velocity
• Direct bolt-on installation with factory mounting locations
• Retains factory sensors for simplified installation

Specifications

• Brand: aFe Power
• Part Number: 48-36803
• Header Material: 304 stainless steel
• Primary Tube Diameter: ~1.625" to 2.50" range
• Header Style: Long tube
• Fitment: Subaru naturally aspirated and turbo H4/2.5L engines as listed above
• Finish: Brushed stainless steel (uncoated)
• Installation: Direct bolt-on - no cutting or modifications required

Included Components

• 1x Twisted Steel 304 SS long tube header assembly (48-36803)
• Header flanges
• Collector sections
• Installation hardware where applicable

Product Description

The aFe Power 48-36803 Twisted Steel Long Tube Exhaust Headers are precision engineered performance headers designed for select Subaru models equipped with H4 or 2.5L engines from 2002 through 2021. Constructed from mandrel-bent 304 stainless steel with laser-cut flanges and TIG-welded joints, these headers increase exhaust flow over restrictive factory manifolds, helping unlock more horsepower, torque, and throttle response. This twisted steel design also accentuates the iconic Subaru "Boxer rumble" exhaust tone.

Installation is direct bolt-on using factory mounting points, retaining all original exhaust sensors for an easier setup with no cutting or modifications required. The unequal length primary tubes and formed collectors help reduce turbulence and maximize exhaust scavenging across the powerband, making this an ideal upgrade for enthusiasts seeking improved performance and sound from their Subaru Impreza, WRX, WRX STI, or Legacy. Note that this product is not CARB exempt and may not be legal for emissions-controlled states such as California.