VRSF BMW S58 X3M/X4M (F97/F98) PRE-LCI Catless Downpipes

These stainless steel tube downpipes are the best bang-for-buck modification available for the S58, with genuine gains of 30whp and 35wtq as a direct bolt-on, climbing to as much as 60whp and 100wtq when paired with a DME remap or Stage 2 BM3 91 octane map. By eliminating the restrictive catalytic converters in the factory downpipes entirely, backpressure is significantly reduced, resulting in faster turbo spool, a genuine increase in power, and a noticeably more aggressive exhaust note.

Rather than necking down closer to the turbos the way most competitor downpipes do, these feature a smooth mandrel-bent design for a significant increase in flow. Hand-crafted from 304-grade stainless steel tubing, they include a lifetime warranty alongside a "No Hassle" satisfaction guarantee covering fitment and defects.

Please note: this is a fully catless (decat) design. If you'd prefer to retain some emissions control, VRSF also offers this same downpipe in a 200-cell catted configuration, sold separately.

Important: this item is intended for track use only and does not comply with UK emission standards. Not suitable for road use.

Why Choose These Downpipes

• 30whp/35wtq gain as a direct bolt-on, up to 60whp/100wtq with a DME remap or Stage 2 tune
• Fully catless design for maximum exhaust flow and turbo response
• Smooth mandrel-bent design, doesn't neck down near the turbos like many competitors
• Hand-crafted 304-grade stainless steel construction
• Lifetime warranty plus a "No Hassle" satisfaction guarantee on fitment and defects
• Catted (200-cell) version also available if full decat isn't needed

Compatibility

• BMW F97 X3M (2019-2021, Pre-LCI, S58)
• BMW F98 X4M (2019-2021, Pre-LCI, S58)