Muffler KSH10948 for Case CX290B CX350B Link-Belt 350 X2

Unleash the Full Potential of Your Isuzu 6HK1

The Case CX350B, Link-Belt 350 X2, and Sumitomo SH350-5 excavators are renowned for their legendary reliability, sharing the exact same robust platform and the powerful Isuzu 6HK1 common-rail diesel engine. However, when the original muffler structurally degrades or becomes restricted with carbon, it creates a severe exhaust bottleneck. This excessive backpressure chokes the 6HK1 engine, leading to delayed turbocharger response, elevated Exhaust Gas Temperatures (EGT), and a significant drop in fuel efficiency. The KSH0948 High-Flow Muffler is specifically engineered to resolve this restriction, allowing your 35-ton excavator to breathe freely and maximize its hydraulic breakout force.

Engineered for Exhaust Velocity and Fuel Economy

A heavy-duty muffler should do more than just suppress noise; it must manage fluid dynamics. Replacing a clogged exhaust component is one of the most effective ways to lower your fleet's operating costs.

• Optimized Exhaust Scavenging: Precision-aligned internal baffles minimize exhaust turbulence and acoustic resistance. This promotes rapid scavenging of spent gases from the combustion chamber, significantly reducing parasitic horsepower loss.

• Turbocharger Protection: By minimizing downstream restriction, the KSH0948 muffler allows the Isuzu turbocharger to spool up effortlessly while actively pulling damaging heat away from the turbine housing.

• Maximum Fuel Efficiency: Lower backpressure means your engine burns diesel more efficiently. Restoring optimal exhaust flow ensures your excavator performs the same heavy trenching operations while consuming measurably less fuel per hour.

Cross-Platform Compatibility

Because Case (CX-B Series), Link-Belt (X2 Series), and Sumitomo (Dash-5 Series) mid-to-large excavators share identical chassis and powertrain engineering, the KSH0948 serves as a universal, 100% exact-fit replacement across all three brands. Manufactured from heavy-gauge, corrosion-resistant steel, it is built to endure the extreme thermal cycling and shock loads of rigorous earthmoving applications.

Diagnostic Fitment & Verification Guide

To ensure a seamless installation, please verify your required part number and machine model prior to procurement:

• Primary Part Number: KSH0948 (Note: Frequently misread as KS10948 on worn data plates)

• Engine Platform: Isuzu 6HK1 / AH-6HK1XYSS (Tier 3)

• CASE Fitment: CX290B, CX330, CX350, CX350B

• Link-Belt Fitment: 290 X2, 330 X2, 350 X2

• Sumitomo Fitment: SH290-5, SH330-5, SH350-5

• Component Type: High-Flow Engine Muffler / Exhaust Silencer Assembly

• Installation: Direct drop-in. Verify flange diameter and mounting bracket positions against your existing exhaust system.