BTR41078 Stainless-Steel Downpipe Flange Reducer 5 in to 4 in. w/Clamp (T6 / S400)

Name: BTR41078 Stainless-Steel Downpipe Flange Reducer 5 in to 4 in. w/Clamp (T6 / S400)
Brand: BRIAN TOOLEY RACING BTR
SKU: 559-BTR41078
Price: 87.99 USD
Availability: InStock

^$87⁹⁹

Ships on 09/15/2026

Lowest Price Guarantee

Stainless Steel

Downpipe Flange Reducer Kit

5 in. to 4 in. Diameter

Stainless-Steel Construction

Includes V-Band Clamp

T6 / S400 Turbo Interface

The BTR41078 downpipe flange reducer kit transitions a 5 in. stainless-steel flange to a 4 in. outlet and includes a V-Band clamp, designed for T6/S400 turbo systems and custom downpipe setups.

Brian Tooley Racing BTR41078 Includes:

One 5 in. stainless-steel downpipe flange
One 4 in. mating flange
One matching V-Band clamp

Brian Tooley Racing BTR41078 Features:

5 in. to 4 in. reduction in diameter for better fitment in tight turbo/down-pipe configurations
Stainless-steel construction offers reliable strength and corrosion resistance under high-heat conditions
Includes clamp for repeatable alignment and service access in high-flow systems

Part TypeTurbocharger Flange

BrandBRIAN TOOLEY RACING BTR

Package Height1.5

Package Width6.0

Package Length6.0

Weight1.0 PG

Part CategoryPerformance Parts

Turbocharger Flange MaterialStainless-Steel

Part FitmentSemi Universal

Clamp IncludedYes

Diameter5

Vendor Part NumberBTR41078