KYOSTAR SS304 Valved Catback Exhaust System for 2021+ BMW G80 M3 G82 G83 M4 S58 3.0T

KYOSTAR SS304 Valved Catback Exhaust System for 2021+ BMW G80 M3 G82 G83 M4 S58 3.0T

The KYOSTAR SS304 Valved Catback Exhaust System is designed for 2021+ BMW G80 M3 and G82/G83 M4 models equipped with the S58 3.0T Twin Turbo inline-six engine. Constructed from high-quality SS304 stainless steel, this catback exhaust system improves exhaust flow efficiency while reducing backpressure and enhancing turbo response. The valved design allows drivers to switch between a refined cruising tone and a more aggressive exhaust sound.

Featuring precision TIG welding, optimized exhaust routing, and factory-style valve compatibility, this system provides improved exhaust flow, stronger exhaust tone, and enhanced exhaust pulse characteristics. It is an ideal upgrade for BMW M enthusiasts looking for increased sound performance while maintaining OEM-style fitment and daily drivability.

Fitment

• 2021+ BMW G80 M3 S58 3.0T Twin Turbo

• 2021+ BMW G80 M3 Competition S58 3.0T Twin Turbo

• 2021+ BMW G80 M3 Competition xDrive S58 3.0T Twin Turbo

• 2021+ BMW G82 M4 S58 3.0T Twin Turbo

• 2021+ BMW G82 M4 Competition S58 3.0T Twin Turbo

• 2021+ BMW G83 M4 Convertible S58 3.0T Twin Turbo

Note:

Compatible engine: S58 3.0T Twin Turbo L6 engine applications only.
Incompatible engine: Not compatible with S55, N55, B58, or other engine platforms.
Verify chassis: Confirm G80/G82/G83 chassis before purchase.
Verify year: Check production year and factory exhaust configuration.
Verify connection: Confirm exhaust flange connection, valve wiring, mounting points, and existing exhaust components.

Fitment Note:
Vehicle specifications may vary by production date, region, and factory equipment. Exhaust valve locations, OPF/GPF configurations, mounting points, and previous exhaust modifications may affect installation compatibility. Professional installation is recommended.

Product Details