4 Cylinder Exhaust Manifold – High‑Performance OEM/ODM Solutions
For Purchasing Managers, Technical Directors & Operations Leaders: Reduce engine back‑pressure, cut emissions, and lower maintenance costs with our precision‑cast 4 cylinder exhaust manifolds.
Get Free Quote in 24 hWhy Your Current Exhaust Manifold Is Holding Back Production
- High Price, Low Margin: Imported manifolds can cost up to 40% more than locally sourced alternatives.
- Poor Material Quality: Cracks and warping lead to an average 12% increase in warranty claims.
- Long Lead Times: Typical delivery exceeds 45 days, disrupting assembly schedules.
- Limited Customization: Standard designs rarely match the specific flow dynamics of your engine series.
According to a 2025 industry survey, 57% of OEMs cite “inconsistent casting quality” as a top risk factor for engine downtime.
See the SolutionOur 4 Cylinder Exhaust Manifold – The Complete Answer
- Powerful Factory: 2,000 t/yr casting capacity in Shijiazhuang, China.
- Quality Assurance: ISO 9001, CE, RoHS, and GS certifications; 100% X‑ray inspection.
- OEM/ODM Design: CFD‑optimized flow paths tailored to your engine model.
- High‑Speed Delivery: Air‑freight within 10 days from order confirmation.
- Competitive Pricing: Up to 30% lower than North‑American suppliers.
Technical Specifications
| Parameter | Specification |
|---|---|
| Material | Grey Cast Iron / Aluminum 6061‑T6 / Stainless Steel 304 |
| Casting Process | Sand Casting / Die Casting / Lost‑Wax (Precision) |
| Dimensions | Custom to engine block (up to 500 mm length) |
| Surface Finish | Ra ≤ 1.6 µm (machined) / As‑cast ≤ 3.2 µm |
| Weight | 2.8 – 4.5 kg (depending on material) |
| Operating Temp. | ‑40 °C ~ +800 °C |
Application Scenarios & Case Studies
• Heavy‑Duty Diesel Trucks: 15% improvement in exhaust flow, 8% fuel‑economy gain.
• Marine Generators (4‑cyl): Extended service life by 22 months after switching to our alloy‑cast design.
• Industrial Generators (OEM): Customized manifold reduced back‑pressure by 0.8 kPa, cutting emission levels 12% below EPA limits.
Request a Technical SampleTrusted By Leading Brands Worldwide
“Switching to YD’s 4‑cyl exhaust manifold cut our warranty claims by 35% and saved $120 k in the first year.” – James L., Procurement Manager, North America Logistics Inc.
“The OEM design service delivered a perfect fit for our new diesel engine platform within 2 weeks.” – Maria S., Technical Director, MarinePower Corp.
Certificates: ISO 9001, CE, RoHS, GS, CB, FCC, VDE, SAA – all verified by third‑party labs.
View Full Certification PortfolioFrequently Asked Questions
What is the minimum order quantity for a custom 4 cylinder exhaust manifold?
We accept orders as low as 50 pieces for ODM projects; OEM standard models start at 20 pieces.
Can you provide material certifications for each batch?
Yes. Every shipment includes mill test reports (MTR) and compliance certificates (CE, RoHS, etc.).
What are the payment terms for first‑time buyers?
30 % T/T deposit, 70 % balance against copy of BL; L/C (at sight) also accepted.
How long does shipping take to the United States?
Air freight: 7‑10 days; sea freight: 25‑30 days (port to door). We also offer DDP service.
Do you provide after‑sales technical support?
24 / 7 engineering hotline, free CAD files for integration, and a 12‑month warranty on material defects.
Ready to Upgrade Your Engine Performance?
Limited Offer: First 100 orders receive a complimentary 10% discount and free engineering sample.
Risk‑Free: We provide a 30‑day money‑back guarantee if the manifold does not meet the agreed specifications.
Email Inquiry WhatsApp BenWhat Our Global Clients Say
- Thomas K., Purchasing Manager, US Heavy Machinery Co. – “The manifolds arrived on schedule, met all tolerance checks, and helped us cut assembly time by 18%.”
- Linda M., Operations Lead, Midwest Diesel Engines – “Y‑D’s engineering support trimmed our redesign phase from 4 weeks to 1 week. Excellent ROI.”
- Ben R., Supply Chain Director, Gulf Coast Shipyards – “Cost‑effective, high‑quality castings that passed our marine certification without re‑testing.”
About the Author
Alex Chen, Senior Foundry Engineer
Over 15 years of experience in high‑pressure die‑casting, certified in ISO 9001 internal auditing, and author of “Modern Casting Strategies for Automotive Applications”.
Contact: alex.chen@ydcastings.com | Phone: +86‑311‑808‑126‑83
For Purchasing Managers, Technical Directors & Operations Leaders: Reduce engine back‑pressure, cut emissions, and lower maintenance costs with our precision‑cast 4 cylinder exhaust manifolds. According to a 2025 industry survey, 57% of OEMs cite
