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Invidia 15+ Subaru WRX/STI Single Racing Titanium Tip Cat-back Exhaust Invidia INVHS15SW4GST
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Invidia 15+ Subaru WRX/STI Single Racing Titanium Tip Cat-back Exhaust

Invidia
INVHS15SW4GST
HS15SW4GST
Catback
7 Units In Stock - Ships Next Business Day
$ 1,251.18 $ 856.95
$ 856.95

SKU: HS15SW4GST

Invidia 2015+ Subaru WRX/STI Single Racing Titanium Tip Cat-back Exhaust

The Invidia HS15SW4GST full cat-back exhaust system fits 2015-2021 Subaru WRX and 2015-2020 STI VA-chassis models. It replaces the factory exhaust from the rear oxygen sensor back using 3-inch mandrel-bent piping and a single racing titanium tip for power gains up to 12 wheel horsepower and 10 lb-ft torque. This design cuts backpressure boosts exhaust flow and sharpens throttle response with a deep aggressive tone.

Key Features

  • 304 Stainless Steel Piping: 76mm (3-inch) diameter mandrel-bent tubing resists corrosion and maintains shape under high heat for consistent performance
  • Single Burnt Titanium Tip: 115mm (4.5-inch) racing-style single wall tip sheds heat quickly adds visual appeal and cuts weight versus stainless alternatives
  • Performance Gains: Delivers up to 12 wheel horsepower and 10 lb-ft torque increases through improved scavenging and reduced restriction verified on dyno tests
  • Sound Profile: Produces a refined turbocharged growl at cruise with race-inspired roar under acceleration without cabin drone
  • Weight Savings: System weighs 28 lbs lighter than OEM by 10-12 lbs for better handling and quicker acceleration

Product Notes

  • Direct bolt-on replacement no cutting or welding required for stock-like fitment
  • Inspect tip periodically for road debris damage to preserve finish
  • Ships fully assembled in protective packaging to prevent shipping damage

Installation Notes

  • Professional installation recommended.
  • Bolt-on design uses factory hangers and mounts with included gaskets and hardware
  • Requires basic tools lift and 2-4 hours labor time

This Part Fits

Year Make Model Submodel
2015-2021 Subaru WRX Base
2015-2021 Subaru WRX Limited
2015-2021 Subaru WRX Premium
2015-2020 Subaru WRX STI Base
2015 Subaru WRX STI Launch Edition
2015-2020 Subaru WRX STI Limited
2016 Subaru WRX STI Series.HyperBlue

Why Choose Invidia?

  • Established Japanese engineering focused on Subaru turbo platforms since 1994
  • Every system dyno-tuned for real-world power and sound balance
  • Precision TIG-welded construction ensures leak-free operation for years

Frequently Asked Questions

  • Q: Does HS15SW4GST fit 2015-2021 WRX models with automatic transmission?
    A: Yes it bolts directly to both manual and CVT WRX variants from 2015-2021 as well as STI up to 2020 using factory midpipe connection
  • Q: What material is the tip made from?
    A: Burnt titanium single-layer construction for durability lightweight design and distinctive blue hue after heat cycling
  • Q: What warranty coverage applies?
    A: Invidia offers a limited lifetime warranty on manufacturing defects when installed by certified shop with proof

Shipping & Handling

  • Method: UPS Ground or Freight for oversized items
  • Availability: In stock - ships same or next business day
  • Packaging: Oversized box measures 52 x 14 x 14 inches
  • Weight: 38 lbs shipping weight (28 lbs product weight)

Request For Information

Have questions about Invidia 15+ Subaru WRX/STI Single Racing Titanium Tip Cat-back Exhaust? Fill out the form below and we'll get back to you by the next business day.
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