Vehicle Virals Opinion on the Ultimate Exhaust Upgrade for BMW’s S58 Engine
The FI Exhaust transforms S58 engine, giving it the supercar-like soundtrack it deserves. With high-flow catted downpipes, a valvetronic muffler, and an X-pipe midsection, it combines flawless fitment, striking design, and valved flexibility that lets you switch between refined quiet and aggressive loud on demand. Performance also gets a bump—around 15–20 hp—making this one of the best exhaust upgrades available for the S58. – Vehicle Virals
