Invidia 3" Downpipe To OEM 2.5" Exhaust Adapter 08-14 WRX / 08-21 STI | Precision Fitment | Exhaust Adapter

Overview

The Invidia 3" Downpipe to OEM 2.5" Exhaust Adapter is designed specifically for Subaru WRX and WRX STI models from 2008 through 2014 for WRX and 2008 through 2021 for STI. This adapter allows seamless integration between an aftermarket 3-inch downpipe and the factory 2.5-inch exhaust system, ensuring a proper fit without the need for custom modifications. It is an essential component for enthusiasts upgrading their exhaust system to improve flow and performance while maintaining OEM exhaust routing and mounting points.

Engineered with precision and crafted by Invidia, a brand known for its high-quality Japanese exhaust components, this adapter exemplifies thoughtful design and durable construction. The adapter is built to exacting tolerances to guarantee a secure, leak-free connection between mismatched exhaust diameters. Invidia’s focus on fitment and material quality ensures that this adapter complements your performance exhaust upgrades without compromising reliability or drivability.

For Subaru owners upgrading their turbo-back or downpipe sections, this adapter preserves exhaust system integrity and simplifies installation. By bridging the gap between a larger diameter downpipe and the OEM exhaust, it helps maintain optimal exhaust flow and sound characteristics. This component is a practical solution that supports power gains from turbo upgrades while retaining the factory exhaust system downstream, making it ideal for enthusiasts seeking a balanced performance setup.

Features & Specifications

This Invidia exhaust adapter is engineered for 2008-2014 WRX and 2008-2021 STI models, featuring a 3-inch to 2.5-inch diameter transition. Constructed from high-quality stainless steel, it delivers durability and corrosion resistance for Subaru enthusiasts seeking a reliable exhaust connection during performance upgrades.

Brand: Invidia
Product: 3" Downpipe To OEM 2.5" Exhaust Adapter
Part Number: HS02SWIAPD
Fitment: 2008-2010 STI, 2008-2010 WRX, 2011-2014 STI, 2011-2014 WRX, 2015-2021 STI
Material: Stainless Steel
Finish: Natural Stainless
Construction: Welded
Origin: Made in Taiwan

Key Benefits

Fitment: Precision engineered to ensure a perfect, leak-free connection between 3" downpipes and OEM 2.5" exhaust systems on WRX and STI models.
Durability: Stainless steel construction resists corrosion and withstands high exhaust temperatures for long-lasting reliability.
Performance: Maintains optimal exhaust flow by providing a smooth diameter transition, supporting power gains from upgraded downpipes.
Installation: Simplifies exhaust upgrades by eliminating the need for custom fabrication or modifications to factory components.
Compatibility: Designed specifically for Subaru WRX and STI platforms, ensuring OEM-style fitment and mounting.

What's Included

1× Invidia 3" Downpipe To OEM 2.5" Exhaust Adapter

Installation & Compatibility

Installation of this exhaust adapter is straightforward for those with basic mechanical skills and standard hand tools. It bolts directly between the aftermarket 3-inch downpipe and the factory 2.5-inch exhaust system without requiring cutting or welding. While generally DIY-friendly, professional installation is recommended if you lack experience working with exhaust components to ensure proper sealing and alignment. No special tools are required beyond common exhaust hardware tools.

Professional Installation: Recommended for best results
Modifications Required: None
Verify Compatibility: Confirm fitment for your specific year and trim level within the listed range

Shop with confidence at Subimods—your Subaru parts specialists.

2008-2010 STI Exhaust

Invidia 3" Downpipe To OEM 2.5" Exhaust Adapter 08-14 WRX / 08-21 STI