Housing, Turbine, GTW3684R, T3 undivided .82 A/R, Welded 3″ GT VB (81mm cent. ring) 90mm OD Flange

This Garrett GTW3684R turbine housing is engineered for builders running the GTW3684R turbocharger who need a precision-matched, quick-spooling exhaust housing with a modern V-band outlet. It’s built for serious performance applications where flow characteristics and a durable, leak-resistant connection matter as much as raw power potential. If you’re finishing out a GTW-series build and want a housing designed to complement the turbo’s response, this is the correct factory-matched option.

Specifications

• Housing Type: T3 undivided
• A/R Ratio: .82
• Outlet Connection: Welded 3″ GT V-band
• Center Ring Diameter: 81mm
• Flange OD: 90mm
• Garrett P/N: GTW3684R

Performance & Application

This undivided T3 turbine housing is built around a .82 A/R ratio, giving it a flow profile suited to quick-spooling performance builds that still need strong top-end capability. The welded 3″ GT V-band outlet with its 81mm center ring is designed for a clean, robust downpipe connection that stands up to serious boost and heat cycling. It pairs specifically with the GTW3684R turbocharger platform, making it a direct fit for enthusiasts building or upgrading a GTW-series turbo system. This housing configuration is aimed at performance-focused applications where consistent V-band sealing and predictable turbine-side flow are priorities.

What’s Included

• Stainless steel 3″ GT V-band flange with 81mm protruded lip (ATP-FLS-246)
• Downpipe-side V-band clamp (CLC-CLA-048)

Frequently Asked Questions

What A/R ratio does this GTW3684R turbine housing use?

This turbine housing is configured with a .82 A/R ratio.

What type of turbine housing is this?

It is a T3 undivided turbine housing.

What outlet connection does this housing feature?

It features a welded 3″ GT V-band outlet with an 81mm center ring and 90mm OD flange.

What comes with this turbine housing besides the housing itself?

It includes a stainless steel 3″ GT V-band flange with 81mm protruded lip (ATP-FLS-246) and a downpipe-side V-band clamp (CLC-CLA-048).

For builders running the GTW3684R turbocharger, this factory-correct .82 A/R T3 undivided turbine housing with its welded 3″ GT V-band outlet delivers the exact flow characteristics and connection integrity the platform demands.