The BTR94646 reducer downpipe flange transitions from a 5 in. T6/S400 turbo outlet to 4 in. downpipe tubing. Its aluminum construction and included clamp make it ideal for packaging high-flow turbo systems into more compact exhaust layouts.

Brian Tooley Racing BTR94646 Includes:

• One 5 in. to 4 in. aluminum reducer downpipe flange for T6/S400
• One clamp matched to the flange

Brian Tooley Racing BTR94646 Features:

• Reduces from 5 in. turbine outlet to 4 in. downpipe size
• Lightweight aluminum construction suited for performance builds
• Designed around common T6/S400 turbocharger outlet dimensions
• Clamp included to complete the flange connection

Brian Tooley Racing BTR94646 Notes:

• Check turbo outlet and downpipe routing for clearance before final welding
• Use proper weld techniques to minimize distortion at the transition