Frequently Asked Questions About Kenworth W900A Elbows, Piping & Comp.

What are the main differences between chrome and stainless steel exhaust elbows for my W900A?

Chrome-plated elbows offer a mirror-like finish that many drivers prefer for show trucks, but they require regular polishing and can eventually rust or peel in harsh conditions. Stainless steel elbows, while initially more expensive, provide superior corrosion resistance and maintain their appearance longer with minimal maintenance. For trucks operating in salt-heavy regions or frequent rain, stainless steel is the better long-term investment. Chrome works well for fair-weather trucks or those kept in garages.

Will these exhaust components fit my specific year W900A, and what modifications might be needed?

Most exhaust elbows and piping are designed to fit W900A models from 1961-1984, but there can be variations depending on your engine configuration and whether you have a day cab or sleeper. Pre-1970 models may require different mounting brackets. Always verify your exhaust pipe diameter (typically 5" or 6") and measure the distance from your turbo outlet to where the elbow needs to connect. Some installations may require minor adjustments to hangers or brackets, especially if converting from a different exhaust setup.

How difficult is it to install these exhaust components myself, and what tools will I need?

Installation difficulty varies by component, but most exhaust elbows and straight pipes can be installed in 2-4 hours with basic tools. You'll need a socket set (typically 9/16" and 5/8"), band clamps, exhaust hangers, and potentially a sawzall if cutting is required. The trickiest part is often aligning everything properly to avoid stress on joints. Having a helper makes the job much easier. Professional installation typically runs $200-400 if you prefer to have a shop handle it.

What's the difference between mitered and mandrel-bent elbows, and which is better for my truck?

Mandrel-bent elbows maintain a consistent diameter throughout the bend, providing better exhaust flow and slightly improved performance. Mitered elbows are made from straight sections welded at angles, which can create minor flow restrictions but are often more affordable and readily available in custom angles. For most W900A applications, the performance difference is minimal. Choose mandrel-bent for maximum flow or if you're building a high-performance setup, and mitered for cost-effectiveness or specific angle requirements.

How do I prevent exhaust leaks at the connections, and what type of clamps work best?

Proper sealing starts with clean, undamaged pipe ends and correctly sized components. Stainless steel band clamps provide the most reliable seal and won't rust like standard clamps. Apply high-temperature exhaust sealant to joints before clamping for extra protection. Tighten clamps evenly to avoid warping, and retighten after the first heat cycle. Avoid over-tightening, which can deform pipes. For critical connections, consider using flanged joints with gaskets instead of slip-fit connections.