Practical interchange information for people who work with vehicles.

Built from used-parts experience

InterchangeHQ is powered by Redline Used Auto Parts, a seller of used automotive parts. The service brings real-world parts knowledge into a clear lookup experience designed to make early-stage fitment research faster and more useful.

Our main purpose is to provide interchange information to auto dismantlers sourcing saleable stock, parts professionals responding to customer enquiries, and car enthusiasts researching repair or restoration options.

A useful starting point

Search by vehicle and part to find the Redline interchange code and other vehicles grouped with it. Verified results are supported by OEM part numbers or fit reports, while inferred results are based on available vehicle specifications.

Interchange information is a guide, not a substitute for physical inspection. Before buying, selling or installing a part, always confirm the OEM number, identification tag, specifications and vehicle application.