VRSF F26 X4 M40i N55 Downpipe | 2016-2018

The VRSF downpipe replaces the factory downpipe on the N55-powered F26 X4 M40i, the sportiest version of BMW's X4 coupe-SUV. It is offered as a catless race pipe or with a 200-cell high-flow catalytic converter, both in brushed stainless steel.

What It Does

The factory downpipe holds a dense converter right after the turbo, and that restriction limits how quickly the turbo spools and how much boost it can hold. Replacing it lowers back pressure, and VRSF measures 20 to 25 hp with a tune. The exhaust note also gets deeper. The catted version keeps a high-flow converter for less smell and a more moderate sound.

Materials and Construction

The downpipe is mandrel bent from 304 stainless steel and TIG welded with smooth radius bends, and the flanges are precision CNC machined from 304 stainless for proper fitment every time. VRSF also offers Cerakote thermal barrier coating on its downpipes, rated to 1,800 F, to help keep heat out of the engine bay.

Features

• Catless race or 200-cell high-flow catted
• Mandrel-bent 304 stainless steel
• Precision CNC 304 stainless flanges
• Smooth radius bends for better flow
• 20-25 hp with a tune (VRSF figures)
• Brushed finish

What Is Included

• VRSF X4 M40i downpipe (race or catted)

Required Parts

• An engine tune is needed to run either version without fault codes.
• A 4in turbo-to-downpipe V-band clamp is an optional add-on above.

Specs

• Part numbers: 10262010 (race), 10262011 (high-flow catted)
• Brand: VRSF
• Material: 304 stainless steel, TIG-welded
• Finish: brushed
• Catalyst: none (race) or 200-cell high flow (catted)
• Shipping dimensions: 16 x 7 x 6 in (41 x 18 x 15 cm) for the race version; 18 x 8 x 7 in (46 x 20 x 18 cm) for the catted version
• Shipping weight: 6 lb (2.7 kg) for the race version; 12 lb (5.4 kg) for the catted version

Fitment Notes

• Please enter your year and model at checkout so we can confirm fitment.
• Lifetime warranty on the race downpipe; 1-year warranty on the catted converter.
• Race downpipes remove the catalytic converters and are sold for off-road and competition use only. A tune is needed to run them without fault codes.