FREE SHIPPING* On Orders Over $199 within 48 States
Shop in Confidence with Our Price Protection Program!
The 1% Award · Auto Parts Store of the Year 2026
Clear Car Save Vehicle
  • Invidia 15-21 WRX/STI Q300 Cat Back Exhaust w/ Single Wall Stainless Steel Tips | HS15STIG2S
  • Invidia 15-21 WRX/STI Q300 Cat Back Exhaust w/ Single Wall Stainless Steel Tips | HS15STIG2S

Invidia

Invidia Be the first one to review

Q300 Cat-Back Exhaust - Quad Stainless Tips

Fits: 15-21 WRX/STI

$1,53500 $2,232.72 Save $697.72
Earn $30.70 In JDMuscle Rewards!
Ships When Available-Lead Time Applies ⓘ
Financing available starting $47.96 /month and as low as 0% APR.

Auto Parts Store of the Year 2026

Invidia Q300 Cat-Back Exhaust - Quad Stainless Tips
Fits: 15-21 WRX/STI
Be the first one to review

Estimated Shipping Widget will be displayed here!

Profile Avatar

Talk to an Enthusiast

Verify Fitment & Product Recommendations

M-F 8:30AM - 5:00PM

(866) 833-3536 Email

Fitment

Please Note: Fits 2015-2021 Subaru WRX Sedan and 2015-2021 Subaru WRX STI Sedan (VA chassis) per Invidia dealer application tables for HS15STIG2S. Invidia Q300 twin-outlet cat-back, part HS15STIG2S: 76mm SUS304 stainless mandrel-bent piping, twin-outlet Q300 mufflers, quad single-layer polished stainless tips, gaskets and hardware included. With a stock downpipe, a stock-DP-to-aftermarket-cat-back adapter (e.g. GrimmSpeed 077046) is required. Fitment and specs per Invidia dealer application tables (Concept Z Performance for HS15STIG2S; invidia-usa.com defunct at time of writing).
  • 2015–2021 Subaru | WRX STI
  • 2015–2021 Subaru | WRX

Description

The Invidia Q300 Cat-Back Exhaust for the 2015-2021 Subaru WRX and WRX STI sedan delivers the Q300's deep, refined touring tone with a quad-tip factory-style rear. Built from 76mm mandrel-bent SUS304 stainless steel with CNC-machined flanges and premium machined welds, its twin-outlet mufflers keep power up while staying civilized, finished with four single-layer polished stainless tips. All gaskets and hardware are included for a direct bolt-on fit.

  • Fits 2015-2021 Subaru WRX Sedan and 2015-2021 Subaru WRX STI Sedan
  • 76mm SUS304 stainless mandrel-bent piping, twin-outlet Q300 mufflers
  • Quad single-layer polished stainless tips
  • Deep refined tone, daily-drivable; gaskets and hardware included
  • With a stock downpipe, a stock-DP-to-aftermarket-cat-back adapter (e.g. GrimmSpeed 077046) is required
  • Invidia part HS15STIG2S

Shipping and Delivery

Review our Shipping Policy for delivery details, shipping costs and exclusions.

Warranty and Support

Limited Manufacturer Warranty

Return and Refund

Eligibility, exclusions, applicable fees and exceptions are detailed in our Return Policy. Restrictions apply to special-order and custom products.

Proposition 65

Proposition 65 Warnings: cancer and reproductive harm www.p65warnings.ca.gov