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Invidia

Gemini R400 Cat-Back Exhaust System

Name: Gemini R400 Cat-Back Exhaust System
Brand: Invidia
SKU: INV-HS15STI5TG4ST

$3,983.00 $1,583.27 Save $2,399.73

SKU: INV-HS15STI5TG4ST

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Overview

The Invidia Gemini R400 is a full titanium cat-back exhaust system designed for the 2015-2021 Subaru WRX and STI. It features 80mm primary piping that splits to 60mm at the muffler connections and is finished with 101mm titanium tips. This exhaust is constructed entirely from titanium for reduced weight and includes all necessary gaskets and mounting hardware for installation.

Show original supplier description

The Invidia Gemini R400 Full Titanium Cat-Back Exhaust system is engineered as Invidia's premium offering for the 2015-2021 Subaru WRX (FA20DIT) and STI (EJ257) VA chassis. Constructed entirely from titanium, this cat-back exhaust significantly reduces rear-end weight compared to stainless steel alternatives. It features 80mm diameter primary piping which elegantly splits to 60mm at the Gemini muffler connections, designed to complement the exhaust volume requirements of modified VA platform engines. The system is visually striking with quad 101mm round titanium exhaust tips and a straight exit orientation. Included in the box are the full titanium cat-back exhaust system, titanium exhaust tips, gaskets, and all necessary mounting hardware. Invidia has been manufacturing performance exhaust systems in Japan since 1999, utilizing SUS304 stainless steel and mandrel-bent tubing for optimal flow and durability. Their application-specific designs ensure a precise fit and clean installation. This exhaust is specifically designed to fit the 2015-2021 Subaru WRX with the FA20DIT engine and the 2015-2021 Subaru WRX STI with the EJ257 engine, both on the VA chassis.

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

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Specifications

Brand	Invidia
Part Number	INV-HS15STI5TG4ST
Category	Exhaust

Videos

INSTALLING MY INVIDIA GEMINI R400 EXHAUST ON MY STI!!

2015+ STI Invidia Catless downpipe with Invidia Gemini R400 catback

Invidia R400 Gemini Catback Exhaust 2021 Subaru WRX Install

2016 WRX STi Invidia R400 full titanium catback exhaust warm start with few revs

Best Subaru Exhaust Ever! | Invidia R400 Catback Exhaust Install

Invidia R400 Cat Back Exhaust System Subaru MY15+ STI

Invidia R400 on 2008 Subaru WRX STi (OEM downpipe)

Reviewing The Invidia R400 Gemini Exhaust On Our 2021 Subaru WRX STI!

Invidia R400 Titanium Tip Catback Exhaust - 2015+ STI Exhaust Video

NEW INVIDIA R400 CATBACK EXHAUST...!!! HOW TO INTALL IT ON A SUBARU WRX STI!!!

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Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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