Standard estimated delivery: 7–10 business days total, including approximately 2–3 business days processing and 5–7 business days shipping after dispatch.

Tracking is provided when shipped. Availability, holidays, and carrier delays may affect timing.

Product: BMW G80/G82 M3/M4 Catless Downpipe. Verify vehicle year, model, trim, part dimensions, and selected configuration before ordering.

Professional installation is recommended where wiring, mechanical components, or vehicle safety systems are involved.

Contact support@kbtuning.shop with your vehicle details if you need fitment confirmation.

For unused, uninstalled items in original packaging, contact support@kbtuning.shop within 30 days of delivery to request return authorization. Eligibility, return shipping costs, and any restocking fees depend on the item and approved return terms.

Damaged, defective, or incorrectly supplied items are reviewed separately in accordance with applicable consumer protection laws.

For suspected defects, damage, or incorrect items, email support@kbtuning.shop with your order number and clear photos or video.

Our team will review the concern and advise on available next steps. Damage from improper installation, misuse, accidents, unauthorized modifications, or normal wear is generally not a manufacturing defect.

Any specific warranty period or coverage is governed by the terms supplied with the product; contact support for details.