Supersprint BMW E90 B3, E91 B3, E92 B3 & E93 B3 Stainless Steel Turbo Downpipe Kit( Replace pre-catalytic Converter )(Left / Right Hand Drive)For Xi (4x4) Models

The Supersprint Turbo Downpipe Kit( Replace pre-catalytic Converter )(Left / Right Hand Drive)For Xi (4x4) Models is a precision, direct-fit stainless steel upgrade engineered for the BMW E90 B3, E91 B3, E92 B3 & E93 B3. It replaces the restrictive factory component to free up exhaust flow, sharpen throttle response and give your BMW a deeper, more purposeful note.

Supersprint has been handcrafting performance exhausts in Mantova, Italy since 1955. Every system is designed and validated on the dyno – not by assumption – using thin-wall stainless steel and carefully sized tubing that raises exhaust gas velocity while protecting mid-range torque, so you gain real, usable power across the rev range.

• Handmade in Italy from corrosion-resistant stainless steel
• Dyno-developed for genuine mid-range and top-end power gains
• Direct bolt-on fit to the OEM mounting points
• For racing / track use only
• Threaded bung for the oxygen sensor provided

Part of the following Supersprint exhaust systems:

• 100% Stainless steel system
• 100% Stainless steel system Oversize 2 x Ø65mm - Full kit only
• 100% Stainless steel system, 2 x Ø60mm
• ALTERNATIVE - BMW E90 Sedan 335xi Bi-Turbo (306 Hp N54 Engine) '06 -> 04/2010
• ALTERNATIVE - BMW E91 Touring 335xi Bi-Turbo (306 Hp N54 Engine) 2006 -> 2008

Fitment – this part is compatible with:

• BMW E90 Sedan 335xi Bi-Turbo (306 Hp N54 Engine) '06 -> 04/2010
• BMW E90 Sedan 335xi Bi-turbo 4x4 (500 Hp -> 800 Hp N54 engine conversion) '06 -> 04/2010
• BMW E91 Touring 335xi Bi-Turbo (306 Hp N54 Engine) 2006 -> 2008
• BMW E91 Touring 335xi Bi-turbo 4x4 (500 Hp -> 800 Hp N54 engine conversion) '06 -> 04/2010
• BMW E92 Coupé 335xi Bi-turbo (306 Hp N54 Engine) '06 -> 04/2010
• BMW E92 Coupé 335xi Bi-turbo 4x4 (500 Hp -> 800 Hp N54 engine conversion) '06 -> 04/2012
• BMW E93 Cabrio 335xi Bi-turbo (306 Hp N54 Engine) '06 -> 04/2010
• BMW E93 Cabrio 335xi Bi-turbo 4x4 (500 Hp -> 800 Hp N54 engine conversion) '06 -> 04/2012
• ALPINA B3 (E90) 4x4 3.0i Bi-Turbo (360 Hp) 2007 -> 2010
• ALPINA B3 S (E90) 4x4 3.0i Bi-Turbo (400 Hp) 2010 -> 2013
• ALPINA B3 (E91) 4x4 3.0i Bi-Turbo (360 Hp) 2007 -> 2010
• ALPINA B3 S (E91) 4x4 3.0i Bi-Turbo (400 Hp) 2010 -> 2013
• ALPINA B3 (E92) 4x4 3.0i Bi-Turbo (360 Hp) 2007 -> 2010
• ALPINA B3 S (E92) 4x4 3.0i Bi-Turbo (400 Hp) 2010 -> 2013
• ALPINA B3 (E93) 4x4 3.0i Bi-Turbo (360 Hp) 2007 -> 2010
• ALPINA B3 S (E93) 4x4 3.0i Bi-Turbo (400 Hp) 2010 -> 2013

Supplied by R44 Performance, an authorised Supersprint partner, with fast UK and worldwide delivery. Need help choosing the right option for your build? Contact our team for expert fitment advice.

Unless explicitly stated otherwise, all products sold by R44 Performance Limited are designated RACE ONLY and are solely for competition or off-road use limited to racing formally sanctioned by a recognized racing organization. Any other use, including recreational off-road use, may violate local, state, and Federal laws. R44 Performance Limited does not implicitly or explicitly confirm the legality of using any products it sells on public roads; that is entirely the responsibility of the consumer.

It is the responsibility of the customer to check with all federal, state local and environmental laws before ordering and installing a product. R44 Performance Limited is not responsible for any fees, fines or costs that a customer may incur as a result of failing to check with federal, state, local or environmental laws before ordering and installing a product.

We get a large number of custom orders and requests everyday, so as a result it is not always possible for us to keep every item in stock at all times in our warehouse. If you require the item urgently please contact our sales team here to check the stock before you make your purchase.

We totally understand if you're not certain a part will be compatible with your car, so we highly recommend contacting us here with your query. Our friendly sales team will then be in touch to confirm if this part is the correct part you are looking for.

All in stock products ship the same day if ordered before 2pm GMT

For out of stock items we will contact you with an estimated wait time if not otherwise specified above.

We offer worldwide shipping on all products. If upon receiving your product you wish to return; we offer a 30-day returns policy. For our in-depth returns information please follow the link. "R44 Returns Policy

All of our products come with a standard warranty of 1-3 years. This is dependant on the type of product however. For more details please see our warranty page here.