Frequently Asked Questions

This FAQ explains how buyers can work with GUOHAO on heavy-duty air filters, oil filters, fuel filters, hydraulic filters, cabin filters, and custom replacement references.

For orders, prepare the part number, application, quantity, packaging request, destination country, and target delivery schedule so the team can provide a more accurate quotation.

For technical checks, provide dimensions, OEM or aftermarket cross references, working conditions, and sample photos. GUOHAO can compare these details against available product records and factory experience.

For after-sales communication, keep packaging photos, label information, order records, and installation details together. This helps the support team review questions about fitment, delivery, or product condition.

If a question is not covered here, use the contact page to send drawings, filter numbers, videos, or inspection requirements for a direct response from the GUOHAO team.