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Invidia Q300 cat-back exhaust with 110mm tips on 2015–2021 Subaru STI sedan
Rear view showing dual polished 110mm slash-cut tips on VA STI
Under-car shot of 76mm mandrel-bent stainless piping and tuned mufflers
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Invidia 11+ STI/WRX Sedan Only 76mm Q300 Stainless Steel Tip Cat-back Exhaust

Invidia
INVHS11STIG3S
HS11STIG3S
Catback
Out of stock
$ 2,232.72 $ 1,528.95

SKU: HS11STIG3S

Invidia Q300 Cat-Back Exhaust – 2011-2021 Subaru WRX/STI Sedan 76mm Stainless Steel Tips

The Invidia HS11STIG3S Q300 is the #1 selling premium cat-back exhaust for every 2011–2021 Subaru WRX & STI sedan. Hand-crafted from mandrel-bent 304 stainless steel with 76 mm piping, polished 110 mm slash-cut tips, and Invidia’s signature tuned mufflers delivering a refined deep tone, zero drone, +14 whp / +18 lb-ft gains, and dramatic weight savings. The ultimate daily-driver exhaust that still sounds ferocious under throttle.

Key Features

  • Full 76 mm (3") Mandrel-Bent 304 Stainless – Maximum flow
  • Dual Polished 110 mm Tips – Slash-cut, perfect fitment
  • Tuned Mufflers + Resonator – Deep tone, zero cabin drone
  • +14 whp / +18 lb-ft Gains – Dyno-proven on stock & Stage 2 cars
  • Made in Japan – Limited lifetime warranty

Specifications

Specification Detail
Part Number HS11STIG3S
Piping Diameter 76 mm (3") throughout
Material T304 stainless steel
Tip Diameter 110 mm dual polished
Tip Style Slash-cut, rolled edge
Power Gain +14 whp / +18 lb-ft
Country of Origin Japan
Warranty Limited Lifetime

Product Notes

  • Fits 2011–2021 WRX & STI 4-door sedan only (GV/GR & VA chassis)
  • Will NOT fit hatchback or 2022+ VB WRX

Installation Notes

  • 100% bolt-on 45–60 minute install
  • Uses factory hangers & gaskets (new gaskets recommended)
  • Full color instructions included

This Part Fits

Year Make Model Body
2011–2014 Subaru Impreza WRX / STI Sedan
2015–2021 Subaru WRX / STI Sedan

Why Choose Invidia Q300?

  • Japan’s #1 name in premium stainless exhausts since 1998
  • Every system hand-welded & dyno-tuned in Japan
  • Chosen by more daily-driven & show STI sedans than any other brand

Frequently Asked Questions

  • Q: Will this fit my 2015+ STI hatch?
    A: No, sedan only. Hatch uses HS11STIG3T.
  • Q: Any drone on the highway?
    A: Zero, Q300 is famous for deep tone with no drone.
  • Q: Titanium version available?
    A: Yes, Q300 titanium is HS11STIG3T (hatch) or HS11STIG3S (sedan).

Shipping & Handling

  • Method: UPS/FedEx Ground
  • Availability: In stock – ships same or next business day
  • Packaging: Official Invidia heavy-duty box

Request For Information

Have questions about Invidia 11+ STI/WRX Sedan Only 76mm Q300 Stainless Steel 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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