BMW B46 / B48 Rvng 4" Competition Downpipe (US Models)

Rvng's Competition Series 4" downpipe is built for the US-spec B46 four-cylinder turbo engine in F and G-series BMWs.

Why you need it

The mandrel-bent 4" pipe gives a smoother path into the exhaust for faster spool and better throttle feel. Rvng quotes average gains of 14-16 whp and about 20 wtq on stock boost, and over 24 wtq with a tune.

Fits

• 2016-2024 BMW 330i, 430i, 530i with the B46 (US spec)
• BMW X3 30i, X4 30i, Z4 30i / 20i (B46)
• Select 230i models (some use a slip connection; check yours)
• Not the EU / Asia B48 version

Features

• Mandrel-bent 4" piping
• 100% stainless steel, TIG-welded
• CNC-machined turbo v-band flange
• Upgraded ball joint flange with straight-flow interior
• Stainless flex section
• Keeps the factory ball-type v-band connection
• Works with factory and aftermarket exhausts
• Installation hardware included

Good to know

Intended for off-road and competition use only. Not legal for use on public roads in many areas. Rvng states this item is not for sale, installation or use on licensed vehicles in California. Confirm your year, model and US specification before ordering. A supporting tune is recommended.