KYOSTAR 304 Stainless Steel Downpipe for 2021+ BMW G80 M3 G82 M4 S58 3.0T

KYOSTAR 304 Stainless Steel Downpipe for 2021+ BMW G80 M3 G82 M4 S58 3.0T

Upgrade your BMW M performance platform with the KYOSTAR 304 Stainless Steel Downpipe, engineered specifically for 2021+ BMW G80 M3 and G82 M4 models equipped with the S58 3.0T twin-turbo engine. This high-flow downpipe improves exhaust gas flow by reducing factory exhaust restriction while delivering a more aggressive exhaust tone and supporting improved turbocharger efficiency.

Manufactured from premium 304 stainless steel, the KYOSTAR downpipe provides excellent heat resistance, corrosion protection, and long-term durability for high-performance applications. The optimized exhaust design helps improve exhaust flow characteristics, making it an ideal upgrade for S58-powered BMW builds seeking enhanced sound, improved exhaust response, and increased performance potential.

Features

• High-flow downpipe design helps reduce factory exhaust restriction and improve exhaust gas flow.

• 304 stainless steel construction provides excellent durability, corrosion resistance, and heat tolerance.

• Performance-oriented design supports improved turbocharger exhaust efficiency and response.

• Designed specifically for BMW S58 3.0T twin-turbo M applications.

• Provides a deeper and more aggressive exhaust tone compared with the factory setup.

Fitment

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

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

• BMW G80 M3 Competition S58 3.0T

• BMW G82 M4 Competition S58 3.0T

Note:

Compatible engine: BMW S58 3.0T Twin-Turbo Inline-6 engine applications only.
Incompatible engine: Not compatible with standard 3 Series, 4 Series, B48, B58, N55, diesel, naturally aspirated, or other engine platforms.
Verify chassis: Confirm your BMW chassis code, engine code, and exhaust configuration before purchase.
Verify connection: Check turbo outlet connections, exhaust routing, and existing modifications before installation.

Fitment Note:
Vehicle exhaust configurations may vary depending on production year, market specification, Competition package, and previous modifications. Please compare your factory downpipe connections, mounting points, and exhaust layout with the product photos before ordering.

Professional installation is recommended. Ensure all exhaust connections, clamps, gaskets, and mounting hardware are properly secured after installation.

Package Includes

• 304 Stainless Steel Downpipes

• Exhaust Clamps

• Mounting Hardware

• Gaskets (if included)

Product Details

FAQ

Q: What BMW models does this downpipe fit?
A: This downpipe is designed for 2021+ BMW G80 M3 and G82 M4 models equipped with the S58 3.0T twin-turbo engine.

Q: Is this compatible with BMW B58 or N55 engines?
A: No. This downpipe is specifically designed for S58-powered BMW M models and is not compatible with B58, N55, or other engine platforms.

Q: Will this improve exhaust sound?
A: Yes. The high-flow design helps reduce exhaust restriction and provides a more aggressive performance exhaust tone.

Q: Does this require ECU tuning?
A: ECU tuning is not required for installation. However, tuning may help optimize performance when combined with additional modifications.

Q: Is professional installation recommended?
A: Yes. Professional installation is recommended to ensure proper fitment, sealing, and safe exhaust operation.