• HKS Silent Hi-Power Exhaust | Subaru WRX/STI (02-07) (31019-AF023)
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HKS Silent Hi-Power Exhaust | Subaru WRX/STI (02-07) (31019-AF023)

HKS Silent Hi-Power Exhaust | Subaru WRX/STI (02-07) (31019-AF023)

31019-AF023

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$1,250.00 USD
$1,250.00 USD
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The HKS Silent Hi-Power Exhaust is a cat-back exhaust system designed for Subaru WRX and STI models from 2002 to 2007. Constructed from SUS304 stainless steel, this system features a 2.95-inch main tubing diameter that enhances exhaust flow and performance. The Silent Hi-Power mufflers deliver a sporty appearance while maintaining a moderate sound level, making it suitable for enthusiasts seeking a balance between performance and noise reduction. Its high-quality materials and engineering ensure durability and consistent performance, providing an upgrade that improves both sound and exhaust efficiency without excessive noise.

This exhaust system is a direct bolt-on replacement for the stock setup on compatible Subaru WRX and STI vehicles within the 2002–2007 model years. It is intended for street use, offering a refined sound profile with improved exhaust flow for better power delivery. The kit includes the necessary components for installation, ensuring a straightforward upgrade process. Designed for enthusiasts who want a sporty look and performance without loud exhaust noise, this system is ideal for daily drivers and street performance applications.

Overview

Silent Hi-Power Series Kit by HKS

Silent Hi-Power Series 304 SS Cat-Back Exhaust System with Single Rear Exit by HKS®. Exhaust System Type: Cat-Back. Exhaust Tubing Material: 304 SS. Main Tubing Diameter: 2.95". Exhaust System Sound: Moderate. Silent Hi-Power mufflers offer high performance and sporty appearance with the added benefit of reduced noise levels making it the best choice for more mature enthusiasts. Silent Hi-Power mufflers are constructed entirely of SUS304 grade stainless steel for high lustre, long lasting performance. For certain applications, HKS has introduced the "Silent Chamber" which removes a lot of the lower frequency noise that can often be heard into the cabin even when cruising. The silent chamber removes this uncomfortable noise but due to its closed end design, only a minimal amount of exhaust gas flows into it, meaning that the disruption to exhaust gas flow through the entire system is minimized and there is no harm to performance.

Features

  • Exhaust System Type: Cat-Back
  • Exhaust Tubing Material: 304 SS
  • Exit Location: Single Rear
  • Main Tubing Diameter: 2.95"
  • Exhaust System Sound: Moderate
  • Muffler Body Shape: Round
  • Tip Quantity: 1
  • Tip Finish: Polished
  • Tip Material: Stainless Steel
  • Tip Outlet Diameter: 4.72"
  • Tip Shape: Round
  • Tip Style: HP(TYPE-S)
  • Exhaust Series: silent Hi-Power
  • Pieces: 2
  • Sound Level Stock: 82 dB
  • Sound Level HKS: 90 dB
  • Idle Sound Level Stock: 67 dB
  • Idle Sound Level HKS: 72 dB

Benefits

  • The material is SUS304 for improvement of appearance and durability
  • Proven "Advantex* glass wool" (Continuous fiber glass wool)
  • Hollow hook and pressed flange for some vehicles to reduce weight
  • Redesigned inner structure of silencer to improve performance and appearance

Applications

  • 2000 - 2004 Subaru WRX

What's In The Box?

  • 1 - Silent Hi-Power Series Kit

Warranty

  • Manufacturers Standard Warranty
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