BMW S63 / N63 Downpipes

The S63 is a hot-V engine, so its downpipe is split in two. Primaries bolt to the turbos inside the V; secondaries continue down to the mid-pipe. IRL calls the primaries the first step and pairing both a fully freed-up path. See our S63 primary vs secondary guide.

No. The F95 X5 M and F96 X6 M have their own downpipes, and some are listed only for LCI cars or by production date, so check the model-year notes on the listing. The F10 M5 and F06/F12/F13 M6 also use their own pipes.

No. The N63 and N63TU in cars such as the 550i, 750i, M550i and X5 M50i have their own downpipes, listed separately from the S63 parts, and F-series and G-series N63 cars use different pipes. Match the listing to your chassis and engine.

Yes. The STRATEC F90 M5 downpipes keep high-flow catalytic converters and include a heat shield. Most other S63 and N63 options in this collection are race (catless) pipes, so check the listing if you want to keep a converter.

A supporting tune is recommended in the Spool and Rvng listings, and the brands quote their power figures with a tune. A check-engine light may occur without one, so plan the tune alongside the hardware.

Catless and high-flow downpipes and other emissions-related parts are intended for off-road and competition use and may not be legal on the street where you live. A high-flow converter is not the same as a certified replacement part, so check your local laws and inspection rules before you buy or install one.