BTR31781 Mild-Steel Downpipe Flange Kit 3.5 in. (No Clamp)

Name: BTR31781 Mild-Steel Downpipe Flange Kit 3.5 in. (No Clamp)
Brand: BRIAN TOOLEY RACING BTR
SKU: 559-BTR31781
Price: 29.99 USD
Availability: InStock

^$29⁹⁹

Ships on 09/14/2026

Lowest Price Guarantee

Mild Steel

Downpipe Flange Kit

3.5 in. Diameter

Mild-Steel Construction

No Clamp Included

Turbo Downpipe Fabrication

The BTR31781 downpipe flange kit uses a 3.5 in. mild-steel flange for builders who want a durable weld surface and prefer to choose their own clamp or fastening solution.

Brian Tooley Racing BTR31781 Includes:

One 3.5 in. mild-steel downpipe flange (no clamp)

Brian Tooley Racing BTR31781 Features:

3.5 in. flange diameter suited for mid-size turbo downpipes
Mild-steel construction for strength and weldability
No clamp included to allow custom hardware selection
Flat weld surface for reliable sealing to mating flange or tubing

Brian Tooley Racing BTR31781 Notes:

Use compatible filler material when welding to mild-steel tubing
Check flange for warpage after welding and resurface if necessary

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 Height1.25

Package Width6.25

Package Length6.25

Weight1.31 PG

Part CategoryPerformance Parts

Turbocharger Flange MaterialMild-Steel

Part FitmentSemi Universal

Clamp IncludedNo

Diameter3.5