The 612600111993 exhaust manifold is not just a replacement part; it is a performance upgrade. Manufactured from high‑nickel ductile iron, it withstands thermal cycling up to 850°C without warping or cracking. The integrated EGR ports and oxygen sensor bungs are precisely machined, ensuring seamless integration with your HOWO engine management system.
Every 612600111993 manifold undergoes 100% dimensional inspection and pressure testing. The precision‑cast runners match the exhaust port geometry of HOWO 5‑ and 6‑cylinder heads, eliminating hot spots and ensuring uniform EGT distribution. Fleet operators report a noticeable reduction in turbo lag and a smoother power band across the entire RPM range.
| Parameter | Value | Remark |
|---|---|---|
| OEM Number | 612600111993 | Genuine HOWO |
| Engine Application | 5‑ & 6‑cylinder | WD615 / WD618 |
| Material | Ductile iron (GGG40) | High‑nickel |
| Flange Thickness | 14 mm | Precision ground |
| Max. Operating Temp. | 850 °C | Continuous |
| Bolt Pattern | 4 x M10 | Torque 45 Nm |
| Weight | 4.2 kg | ±0.1 kg |
| Coating | Zinc‑phosphate | Anti‑corrosion |
Fitting the 612600111993 is straightforward: use new gaskets and torque the nuts in a cross pattern to 45 Nm. The manifold features alignment dowels that guarantee perfect mating with the cylinder head. Always replace the studs if they show signs of stretching.
For long‑term performance, inspect the manifold every 50,000 km for any signs of soot accumulation. The smooth internal radius of Exhaust Manifolds reduces carbon build‑up, but periodic cleaning is recommended for extreme duty cycles.
This manifold (612600111993) is a direct cross for multiple OEM variants used in SINOTRUK, FAW, and Shacman trucks. The precision casting ensures that the exhaust ports align perfectly with the cylinder head, eliminating the need for porting or modification. Whether you are maintaining a fleet of HOWO dump trucks or Sitrak long‑haul tractors, this component guarantees reliable operation under the most demanding conditions.
Independent lab tests show that the manifold reduces exhaust backpressure by up to 22% compared to aftermarket castings. This directly translates to lower EGTs (exhaust gas temperatures) and improved turbocharger response. The material’s high thermal conductivity also helps in dissipating heat quickly, protecting nearby components like the starter motor and wiring harness.
The exhaust manifold is the preferred choice for workshops that demand OEM fit and finish. Its robust construction, combined with precise port alignment, makes it the ideal replacement for 5‑ and 6‑cylinder HOWO engines. Upgrade your truck today and experience the difference that genuine engineering makes.
Genuine HOWO exhaust manifold • 5 & 6 cylinders • Heavy‑duty certified
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