HKS31029-AF001-HKS SUPER TURBO MUFFLER GDB(E-G)-Catback-HKS
HKS31029-AF001-HKS SUPER TURBO MUFFLER GDB(E-G)-Catback-HKS
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HKS SUPER TURBO MUFFLER GDB(E-G)

HKS
HKS31029-AF001
4957266918685
Catback
1 Units In Stock - Ships Next Business Day
$ 1,400.00
FREE Ground Shipping!
$ 1,400.00

SKU: 31029-AF001 | UPC: 4957266918685

HKS SUPER TURBO MUFFLER GDB(E-G) 2004-2007 Subaru Impreza WRX STI

The HKS Super Turbo Muffler GDB(E-G) is a full titanium cat-back exhaust system built for Subaru Impreza WRX STI GDB chassis models from 2004 to 2007. This direct-fit replacement enhances exhaust flow for quicker turbo spool quicker throttle response and measurable power increases up to 14PS over stock. Its design amplifies the raw turbocharger whistle and blow-off sounds while maintaining track-ready volume levels.

Key Features

  • Titanium Construction: Full titanium muffler weighs just 7.2kg versus stock 17.5kg for reduced rear weight and improved handling balance
  • Large Diameter Piping: Mandrel-bent φ60.5-80.0mm pipes with 80mm tips promote high-RPM flow and prevent restriction under boost
  • Turbo-Focused Sound: Internal chamber tuning emphasizes spool-up whine and wastegate flutter for authentic JDM rally sound
  • Compact Dimensions: Muffler measures 500mm L x 400mm W x 290mm H fits cleanly under STI sedan body without ground clearance issues
  • Bolt-On Design: Uses factory hangers and flanges for straightforward replacement on GDB STI models

Product Notes

  • Requires no ECU tuning for installation though dyno tuning recommended for maximum gains
  • Clean exhaust tips regularly to prevent carbon buildup and maintain appearance
  • Ships fully assembled with all necessary gaskets and hardware included

Installation Notes

  • Professional installation recommended.
  • Remove stock cat-back from mid-pipe flange rearward lift and bolt in HKS unit
  • Compatible with factory mounts no cutting or welding required

This Part Fits

Year Make Model Submodel
2004-2007 Subaru Impreza WRX STI
2004-2007 Subaru Impreza WRX STI Type RA-R
2004-2007 Subaru Impreza WRX STI spec C

Why Choose HKS?

  • HKS pioneered Japanese aftermarket tuning since 1973 with motorsport-proven designs
  • Every exhaust undergoes rigorous dyno and sound testing for consistent results
  • Precision TIG-welded joints ensure durability under high-heat high-boost conditions

Frequently Asked Questions

  • Q: Will this fit my 2005 USDM Subaru STI?
    A: Yes direct bolt-on fit for all 2004-2007 Impreza WRX STI GDB chassis including USDM JDM and AUS models
  • Q: What material is the muffler made from?
    A: Full titanium body with SUS304 stainless piping for heat resistance and lightweight performance
  • Q: What is the warranty on this muffler?
    A: HKS offers a 1-year limited warranty against manufacturing defects when installed by certified shop

Shipping & Handling

  • Method: Ground shipping via UPS or FedEx
  • Availability: In stock - ships same or next business day
  • Packaging: Original HKS double-wall box measures 24in x 20in x 16in
  • Weight: 35 lbs shipping weight

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