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HKS
HKS

HKS SUPER TURBO MUFFLER VAG WRX S4

$2309.12

On Backorder — Expected to ship by Sep 19, 2026

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HKS SUPER TURBO MUFFLER VAG WRX S4

Key Features

  • Fits VAG WRX S4.
  • Constructed from durable SUS304 stainless steel for corrosion resistance.
  • Designed to improve exhaust sound with a sporty tone.
  • Cat-back system replaces the factory muffler.
  • Part number 31029-AF012.
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About this part

Product Details

HKS is well-known for its performance exhaust systems, and the SUPER TURBO MUFFLER is a prime example of their dedication to enhancing vehicle sound and performance. This cat-back system is specifically designed for the VAG WRX S4, aiming to improve the exhaust note and potentially the vehicle's breathing characteristics.

Constructed from SUS304 stainless steel, this muffler is built to last and resist corrosion, even in harsh driving conditions. The design focuses on optimizing exhaust flow while producing a satisfying, sporty tone that complements the performance of the WRX S4. The SUPER TURBO muffler is engineered to be a direct replacement for the factory unit, simplifying the installation process. You can expect a noticeable change in the exhaust sound, with a deeper, more aggressive note under acceleration, without being overly intrusive during cruising.

This cat-back system includes the muffler assembly. For a complete exhaust upgrade, consider pairing it with other HKS components or ensuring your existing exhaust system is in good condition. Installation is straightforward, typically requiring basic hand tools and following the manufacturer's provided instructions.

Specifications

Brand
HKS
Manufacturer Part #
31029-AF012
UPC
4957266919910

Frequently Asked Questions

HKS SUPER TURBO MUFFLER VAG WRX S4

$2309.12