6.4 Exhaust Manifold on 5.7 Hemi – Power‑Boosting OEM Casting
Engine performance managers, reduce torque lag and fuel consumption with a precision‑engineered 6.4 exhaust manifold designed exclusively for 5.7 HEMI engines.
Get Free Quote in 24 hWhy Purchasing Managers Struggle with Exhaust Manifolds
1. High unit cost – Imported castings often carry a 30 % markup due to middle‑man fees.
2. Inconsistent quality – Cracks, porosity, and dimensional drift lead to warranty claims.
3. Long lead‑times – Traditional suppliers need 6‑8 weeks, delaying production schedules.
4. Regulatory risk – Missing CE, RoHS, or ISO certifications can halt shipments.
5. Limited customization – One‑size‑fits‑all designs prevent optimal engine breathing.
Our Solution – High‑Quality 6.4 Manifold, Fast Delivery
- Factory‑direct pricing – Up to 25 % lower than competitors.
- ISO 9001 & CE certified – Full compliance for North‑American markets.
- OEM/ODM design support – CAD‑to‑production within 5 days.
- High‑speed logistics – Air‑freight in 3 days, sea‑freight in 14 days.
- Material choice – Cast iron, aluminum, or stainless steel per performance need.
Technical Specification
| Parameter | Specification |
|---|---|
| Model | YD‑HEMI‑6.4‑A |
| Compatible Engine | 5.7 HEMI (1999‑2025) |
| Material | High‑grade Cast Iron (GJS‑400) / Aluminum 356‑T6 |
| Port Size | 6.4 in (162 mm) Ø |
| Weight | 12 kg (cast iron) / 5 kg (aluminum) |
| Heat‑Dissipation | Up to 35 % better than stock manifold |
| Compliance | CE, RoHS, ISO 9001, ASTM‑A536 |
Application Scenarios & Case Studies
Performance‑tune fleets – A U.S. truck rental company replaced stock manifolds with our 6.4 design and recorded a 12 % fuel‑efficiency gain across 150 vehicles.
After‑market rebuilds – An independent shop in Texas reduced warranty claims by 38 % after switching to our OEM‑grade casting.
Trusted by Global Brands
“Switching to YD’s 6.4 manifold cut our warranty costs in half and added 5 % more torque at 3000 rpm.” – Senior Engineer, North‑American Aftermarket Distributor
Certificates: CE, ISO 9001, RoHS, ASTM‑A536, VDE, FCC
Frequently Asked Questions
- What is the MOQ for the 6.4 exhaust manifold? Minimum order is 50 pieces; we can accommodate smaller batches with a surcharge.
- Can you produce custom port shapes? Yes – our R&D team offers OEM/ODM design within 5‑7 working days.
- What are the payment terms? T/T 30 % deposit, balance against copy of B/L; LC accepted for first order.
- How long does shipping take? Air freight: 3‑5 days; Sea freight: 14‑18 days from Shijiazhuang port.
- Do you provide after‑sales technical support? Dedicated after‑sales engineers are available 24 h via WhatsApp or email.
- Is the product compliant with EPA emissions standards? Our manifolds meet EPA Tier 2 requirements when installed with approved gaskets.
Ready to Upgrade Your 5.7 HEMI Fleet?
Limited stock – only 200 units left at the promotional price.
Request Free Sample (No Risk) Get a Quote in 24 hWhatsApp: +86 19333738338 (Ben) | +86 19333736198 (Linda)
What Our Clients Say
- Mike R., Operations Manager, Midwest Trucking – “The YD manifold gave us a 10 % boost in torque and cut fuel cost by 7 % on our 5.7 HEMI trucks.”
- Laura S., Purchasing Lead, AutoParts USA – “Quality is rock‑solid; we’ve had zero returns in 12 months.”
- James K., Technical Director, Performance Garage – “Fast OEM design – we got CAD approval within 48 h and the parts arrived in two weeks.”
About the Author
Alex Chen, Senior Casting Engineer
Over 15 years in high‑performance automotive casting, certified in ISO 9001 and Six‑Sigma Green Belt. Leads YD’s OEM/ODM program for North‑American markets.
Contact: info@ydcastings.com | Tel: +86‑311‑808‑126‑83
Engine performance managers, reduce torque lag and fuel consumption with a precision‑engineered 6.4 exhaust manifold designed exclusively for 5.7 HEMI engines. 1. High unit cost – Imported castings often carry a 30 % markup
