About us

HANG FUNG INTERNATIONAL TRADING LIMITED’s brand DieselPerf (official website: DieselPerf.com) is a professional supplier specializing in diesel truck emission system optimization and related accessories. We are dedicated to providing diesel truck owners with one-stop solutions for power enhancement, efficiency optimization, and maintenance cost reduction.

Our Products and Solutions

We focus on diesel truck emission system optimization and supporting accessories, building a professional product matrix for owners with different vehicle models and needs:

  • Core Emission Optimization Products: Including EGR delete kits, DPF delete exhaust pipes, tuners, etc., which are precisely compatible with mainstream diesel truck series such as Powerstroke, Duramax, and Dodge, helping owners break through emission restrictions and unleash power potential.
  • Full-scenario Supporting Accessories: Ranging from stainless steel exhaust pipes, fuel tank and oil pan kits, to differential covers and battery mounts, covering multiple Ford and other brand diesel truck models from 1986 to 2024, meeting the diverse needs of vehicle upgrading and maintenance.

Direct and Transparent Sales & Service Model

  • Online Direct Sales Channel: We reach global users directly through the official website DieselPerf.com, eliminating intermediate links and passing savings on to owners. We also regularly launch discount promotions (e.g., 20% off sitewide before Black Friday with coupon code DP12), with some products discounted by more than 30%.
  • Full-process Service Support
    • Hassle-free Installation: Step-by-step installation guides and video tutorials are provided to lower the threshold for self-installation, enabling owners to complete product deployment easily.
    • Technical Support: Professional tuning technicians are available on weekdays (9:00 AM - 6:00 PM) to provide instant technical consultation via email (service@DieselPerf.com) or phone (+13250131608/+85253810098).
    • Quality Commitment: Products are verified by actual tests, and core accessories (such as bolts and kits) are built on high quality to ensure the effectiveness of emission system repair and optimization, providing long-term protection for owners’ usage.

Tiered Logistics and Delivery Services

We offer differentiated logistics solutions for users in different regions, balancing timeliness and cost:

  • Canada & International Regions: The Economy International logistics option has a delivery time of 6-10 working days with a freight of $25.00. We also provide services like DHL Express and USPS (both enjoying Shopify discount rates), supporting transit time calculation and multiple service options, with some channels allowing prepaid duties.
  • US Region: A shipping fee of $7.00 applies to orders from $0.00 to $49.99; orders of $50.00 and above enjoy free shipping, making purchases more convenient for US owners.

Core Value We Create for Owners

Choosing DieselPerf means choosing the dual benefits of "Cost Saving + Performance Leap":

  • Drastic Reduction in Maintenance Costs: We help owners remove easily faulty emission systems such as EGR, DPF, and SCR, avoiding high annual maintenance expenses (e.g., DPF cleaning costs around $300, SCR failure repair costs over $5,000). Long-term use can save up to $25,000 in maintenance costs.
  • Vehicle Performance Upgrade: After emission system optimization, trucks have significantly enhanced power and improved fuel efficiency, while solving pain points such as frequent check engine lights, simultaneously improving driving experience and operational efficiency.

Contact Us

  • Business Hours: Monday to Friday, 9:00 AM - 6:00 PM
  • Communication Channels: Email at service@DieselPerf.com; Phone at +13250131608/+85253810098
  • Address Information:
    • Company Address (Washington, DC): 1427 South Carolina Avenue Southeast, Washington, DC
    • US Warehouse Address: UNIT D, 9/F, MERCANTILE IND., & WAREHOUSE BLDG., 16 TA CHUEN PING ST, Kwai Chung, Hong Kong