Kenworth W900B/W900L Exhaust Parts

Frequently Asked Questions About Kenworth W900B/W900L Exhaust Parts

Will these exhaust parts fit my specific year and model W900B or W900L?

Most of our exhaust components are designed to fit Kenworth W900B models from 1987-2006 and W900L models from 1988-present. However, fitment can vary based on your truck's configuration, wheelbase, and whether you have an extended hood. We recommend checking the product description for specific year ranges or contacting our support team with your OEM number to ensure proper fitment. Pay special attention to whether your truck has a day cab or sleeper configuration, as this affects stack placement and pipe routing.

What's the difference between 304 and 409 stainless steel exhaust components?

304 stainless steel offers superior corrosion resistance and maintains its chrome-like appearance longer, making it ideal for show trucks or drivers in coastal areas with salt exposure. 409 stainless steel is more affordable and still provides good durability for most applications, though it may develop a light surface rust over time that doesn't affect performance. For daily drivers in moderate climates, 409 is typically sufficient. Choose 304 if appearance longevity is crucial or you operate in harsh environments.

Can I install these exhaust parts myself, or do I need professional installation?

Many exhaust components like straight pipes, elbows, and mufflers can be installed with basic tools and mechanical knowledge. You'll typically need pipe clamps, hangers, and basic hand tools. However, complete exhaust system overhauls, especially those requiring cutting or welding, are best left to professionals. Stack installation often requires drilling through the cab, which demands precision to avoid damage. Most installations take 2-4 hours depending on complexity. Always ensure proper support and clearances to prevent rattling or heat damage.

What finish options are available, and how do they hold up over time?

We offer chrome-plated, polished stainless, and painted finishes. Chrome provides the brightest mirror finish but requires regular polishing to prevent pitting and rust, especially in winter conditions. Polished stainless steel maintains its appearance with less maintenance and won't rust through if the chrome layer is compromised. Painted options like black or heat-resistant coatings are ideal for work trucks where durability matters more than shine. Consider your maintenance schedule and operating environment when choosing a finish.

How do I know what diameter exhaust pipes and stacks I need?

Most W900B and W900L trucks use 5-inch diameter exhaust systems from the factory, though some newer models may have 4-inch systems. Check your current exhaust outlet at the turbo or measure your existing pipes to confirm. For stacks, 5-inch or 6-inch diameters are common, with 6-inch providing a more aggressive look but potentially requiring adapter pipes. Ensure all components match in diameter or use appropriate reducers. Larger diameters don't necessarily improve performance and may actually reduce exhaust velocity on stock engines.