KYOSTAR 3.5" Catless Downpipes for BMW G80 M3 G82 M4 G87 M2 S58 Off-Road Use

The KYOSTAR 3.5-Inch Catless Downpipe Set with Heat Shield is an aftermarket exhaust component listed for selected BMW M3, M4, and M2 vehicles equipped with the S58 3.0-liter twin-turbocharged inline-six engine.

Featuring a dual-pipe configuration and silver-colored thermal shielding, this product is intended for specialized exhaust fabrication, motorsport development, and competition-related applications where legally permitted.

The supplied product image shows two curved metallic downpipe assemblies with heat-shielded exterior sections and several small installation-related components. Exact pipe material, thermal shielding construction, flange dimensions, and included hardware quantities require confirmation.

This product does not include catalytic converters. It is not represented as emissions-compliant or approved for public-road use in the United States.

KYOSTAR welcomes technical and purchasing inquiries from professional exhaust fabricators, BMW performance specialists, motorsport workshops, automotive aftermarket distributors, and professional resellers.

• BMW S58 Engine Application: Supplier-listed for selected BMW M3, M4, and M2 vehicles equipped with the 3.0L twin-turbocharged inline-six engine.
• Dual Downpipe Configuration: Product image shows two separate downpipe assemblies.
• 3.5-Inch Listed Size: Supplier-described nominal pipe size of approximately 88.9mm; exact measurement location requires confirmation.
• Catless Construction: Designed without catalytic converters, subject to applicable emissions and vehicle modification restrictions.
• Thermal Shielding: Features visible silver-colored heat-shielded pipe sections; exact shielding material requires verification.
• Formed Exhaust Tubing: Curved metallic pipe construction intended for specialized exhaust routing applications.
• Vehicle-Specific Exhaust Application: Listed for selected BMW G80, G81, G82, G83, and G87 chassis configurations.
• Installation-Related Components: The supplied image shows small hardware components; complete package contents must be confirmed.
• Professional Aftermarket Supply: Intended for qualified motorsport specialists, exhaust fabricators, distributors, and professional performance parts buyers.

Supplier-Listed Applications — Verification Required:

• 2021+ BMW G80 M3 Sedan — S58 3.0L Twin-Turbo Inline-6.
• 2021+ BMW G80 M3 Competition — S58 3.0L Twin-Turbo Inline-6.
• BMW G81 M3 Touring — S58 3.0L Twin-Turbo Inline-6; confirm production year and regional specification.
• 2021+ BMW G82 M4 Coupe — S58 3.0L Twin-Turbo Inline-6.
• 2021+ BMW G82 M4 Competition — S58 3.0L Twin-Turbo Inline-6.
• 2021+ BMW G83 M4 Convertible — S58 3.0L Twin-Turbo Inline-6.
• 2023+ BMW G87 M2 Coupe — S58 3.0L Twin-Turbo Inline-6; verify exact exhaust configuration.

Engine: BMW S58 3.0L Twin-Turbocharged Inline-6.

Important: Model-year references and chassis applications must be verified against the actual vehicle VIN, production date, original exhaust system, and downpipe connection arrangement. Not all models began production in the same year.

• Confirm the vehicle VIN, chassis code, production date, and S58 engine configuration.
• Verify turbocharger outlet flange dimensions and exhaust connection geometry.
• Confirm whether the listed 3.5-inch measurement refers to pipe outside diameter, inside diameter, or a specific connection section.
• Verify the exact pipe material, material grade, and wall thickness.
• Confirm the type, construction, and coverage of the thermal shielding.
• Check oxygen sensor port locations, thread specifications, and compatibility with the intended application.
• Confirm whether gaskets, fasteners, clamps, and other mounting hardware are included.
• Check underbody clearance, nearby heat-sensitive components, and exhaust routing.
• No independently verified horsepower, torque, exhaust temperature, or sound level improvement figures have been provided.
• This product has no catalytic converters and is not approved or represented as legal for emissions-controlled public-road vehicles.
• Competition or off-road descriptions do not automatically create an exemption from applicable emissions regulations.
• Professional installation and exhaust leak testing are recommended.

This downpipe set is listed for selected BMW S58-powered M3, M4, and M2 applications.

Before ordering, verify turbocharger outlet connections, factory exhaust configuration, oxygen sensor placement, downstream pipe connections, and available installation clearance.

Differences between model years, vehicle variants, and exhaust configurations may affect installation compatibility.

Legal Notice: Removal or replacement of emissions-control equipment may violate federal, state, or local regulations. This product must not be installed or used in a manner that unlawfully removes, defeats, or bypasses required emissions controls. Buyers are responsible for confirming that the intended application is legally permitted.

The KYOSTAR 3.5-Inch Catless Downpipe Set is intended for specialized BMW S58 exhaust projects where the proposed use is permitted under applicable laws.

Potential buyers include professional motorsport workshops, qualified exhaust fabricators, vehicle development specialists, and aftermarket performance component distributors.

Final application suitability depends on verified vehicle compatibility, exhaust system dimensions, installation requirements, and legal compliance.

KYOSTAR welcomes purchasing inquiries from professional motorsport businesses, BMW performance specialists, exhaust fabrication workshops, automotive aftermarket distributors, and qualified parts resellers.

For current wholesale pricing, minimum order requirements, technical specifications, product availability, packaging details, and shipping arrangements, please provide SKU KD5S011N, estimated order quantity, destination market, and intended application.

Professional buyers are encouraged to request verified vehicle fitment, flange dimensions, pipe material specifications, heat shielding information, and a complete packing list before placing bulk orders.

All purchases and intended uses must comply with applicable emissions, import, sale, installation, and vehicle modification regulations.

Pricing, minimum order quantities, product availability, and production or fulfillment lead times are subject to confirmation.

Q1: What is the KYOSTAR 3.5-inch catless downpipe set?
A: It is a dual-downpipe exhaust component listed for selected BMW S58-powered M3, M4, and M2 applications.

Q2: Which BMW models are listed for this product?
A: The supplier lists BMW G80/G81 M3, G82/G83 M4, and G87 M2 applications. Exact fitment requires verification.

Q3: Does this product fit the BMW S58 engine?
A: It is supplier-listed for selected S58 applications. Connection dimensions and vehicle-specific compatibility must be confirmed.

Q4: What is the listed pipe diameter?
A: The supplier lists 3.5 inches, approximately 88.9mm. The actual measurement location must be confirmed.

Q5: Are catalytic converters included?
A: No. The product is described as a catless downpipe set.

Q6: Does the product include heat shielding?
A: The supplied image shows silver-colored thermal shielding. Exact material and construction require confirmation.

Q7: Is the product made from T304 stainless steel?
A: The exact pipe material and stainless steel grade have not been confirmed.

Q8: Does this product increase horsepower?
A: No independently verified horsepower or torque improvement figures have been supplied.

Q9: Is this downpipe set legal for public-road use in the United States?
A: It is not represented as road legal or emissions compliant. Removing required catalytic converters may violate applicable emissions regulations.

Q10: Are gaskets and mounting hardware included?
A: The product image shows small hardware components, but the complete package contents require confirmation.

Q11: Can professional distributors request wholesale pricing?
A: Qualified business buyers may contact KYOSTAR with their estimated purchasing quantities, destination market, and intended legally permitted application.

Q12: How can I request a quotation?
A: Submit an inquiry with SKU KD5S011N, required quantity, destination country, intended vehicle application, and relevant technical requirements.

Warranty coverage, applicable exclusions, packaging specifications, shipping methods, and estimated production or fulfillment lead times should be confirmed with KYOSTAR before placing an order.

Final package dimensions, shipping weight, material specifications, and included installation hardware must be verified before freight quotation.

Buyers are responsible for verifying vehicle compatibility and ensuring compliance with applicable emissions, import, sale, installation, and vehicle modification laws.

For technical specifications, purchasing inquiries, compatibility questions, or after-sales support, please contact KYOSTAR with the relevant SKU.

Looking to source BMW S58 downpipe components for a legally permitted motorsport or specialized exhaust application? Contact KYOSTAR with your estimated order quantity, destination market, required specifications, and intended application to request current purchasing information and a quotation.

Reference SKU: KD5S011N