Frequently Asked Questions About Peterbilt 330/335/337 Elbows, Piping & Comp.

What material options are available for exhaust elbows and pipes, and which is best for my application?

Most exhaust components for Peterbilt 330/335/337 models come in either aluminized steel or 304 stainless steel. Aluminized steel offers good corrosion resistance at a lower price point and works well for most standard applications. Stainless steel provides superior longevity and heat resistance, making it ideal for heavy-duty use, coastal environments, or applications requiring maximum durability. Chrome-plated options are also available for show trucks or when appearance is a priority.

Will these exhaust components fit my specific year model Peterbilt 330, 335, or 337?

These exhaust components are designed to fit Peterbilt 330, 335, and 337 models typically from 2005 through current production years. However, there can be variations based on engine type (Caterpillar C7, Cummins ISB, Paccar PX-6/PX-7) and whether you have a single or dual exhaust system. Always verify your specific engine model and exhaust configuration before ordering. Key measurements to check include inlet/outlet diameter (typically 4" or 5") and the overall length needed for your application.

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

Most exhaust elbows and straight pipes can be installed with basic tools including wrenches, exhaust clamps, and potentially a sawzall for modifications. Installation typically takes 1-3 hours depending on the components being replaced. Common challenges include dealing with rusted connections and ensuring proper alignment to prevent exhaust leaks. While many operators successfully complete DIY installations, professional installation is recommended if you need to modify hangers, brackets, or if welding is required for a secure fit.

What diameter exhaust components do I need for my Peterbilt 330/335/337?

The correct diameter depends on your engine and existing exhaust system. Most Peterbilt 330/335/337 models use either 4-inch or 5-inch diameter exhaust systems. Caterpillar C7 engines typically use 4-inch systems, while larger displacement engines like the Cummins ISC or Paccar PX-7 often use 5-inch systems. Check your existing exhaust pipe diameter before ordering, as using the wrong size will require adapters or modifications that can restrict exhaust flow and affect performance.

How do I prevent exhaust leaks at connection points?

Proper sealing is crucial for preventing exhaust leaks that can affect performance and create safety hazards. Use high-quality exhaust clamps rated for commercial truck applications, not automotive-grade clamps. Apply high-temperature exhaust sealant at slip-fit connections before clamping. Ensure all surfaces are clean and free of rust or debris before assembly. For critical connections, consider using band clamps instead of U-bolt style clamps for more even pressure distribution. After installation, run the engine and check for leaks using soapy water on connections - bubbles indicate a leak that needs attention.