BTR04304 Stainless-Steel Reducer Downpipe Flange 5 in. to 4 in. T6/S400 (No Clamp)

Name: BTR04304 Stainless-Steel Reducer Downpipe Flange 5 in. to 4 in. T6/S400 (No Clamp)
Brand: BRIAN TOOLEY RACING BTR
SKU: 559-BTR04304
Price: 69.99 USD
Availability: InStock

^$69⁹⁹

Ships on 09/15/2026

Lowest Price Guarantee

Stainless Steel

Reducer Downpipe Flange

5 in. to 4 in. Transition

Stainless-Steel Construction

T6/S400 Turbo Outlet

No Clamp Included

The BTR04304 reducer downpipe flange is a stainless-steel T6/S400 piece that steps a 5 in. turbo outlet down to 4 in. downpipe tubing. It combines high strength and corrosion resistance for demanding turbo applications where size reduction is required.

Brian Tooley Racing BTR04304 Includes:

One 5 in. to 4 in. stainless-steel reducer downpipe flange for T6/S400 turbo outlet (no clamp)

Brian Tooley Racing BTR04304 Features:

Reduces from 5 in. turbine outlet to 4 in. downpipe size
Stainless-steel construction for excellent durability and corrosion resistance
Designed around common T6/S400 turbocharger outlet dimensions
Provides a strong weld surface at the transition point

Brian Tooley Racing BTR04304 Notes:

Clamp and hardware must be supplied separately
Plan downpipe routing and support to avoid stressing the flange welds

Boost Your Build with Brian Tooley Racing BTR Turbocharger Flanges – Fabrication Made Easy

Brian Tooley Racing BTR Turbocharger Flanges are your go-to seamless turbo system fabrication solution. These BTR Flange Kits are offered in mild steel, stainless steel, and aluminum to match your performance and durability needs. Designed in multiple sizes, they effortlessly adapt to various turbo outlet and downpipe configurations, saving time and simplifying your custom exhaust build. With optional v-band clamps included, BTR makes it easy to get your turbo project back on track in no time.

Part TypeTurbocharger Flange

Product LineBrian Tooley Racing BTR Turbocharger Flanges

BrandBRIAN TOOLEY RACING BTR

Package Height6.25

Package Width6.25

Package Length7.75

Weight2.0 PG

Part CategoryReplacement Parts

Turbocharger Flange MaterialStainless-Steel

Part FitmentSemi Universal

Clamp IncludedNo

Diameter5