Frequently Asked Questions About Peterbilt 357/378 Chrome Stacks & Tops

What are the differences between 304 and 430 stainless steel stacks, and which should I choose?

304 stainless steel offers superior corrosion resistance and maintains its shine longer, making it ideal for trucks exposed to road salt and harsh weather conditions. 430 stainless steel is more budget-friendly and still provides good durability for moderate climates. Most professional drivers prefer 304 for its long-term value, though 430 works well for trucks primarily operating in dry regions. Both grades accept chrome plating equally well.

Will these stacks fit my specific Peterbilt 357 or 378 model year?

Our chrome stacks are designed to fit Peterbilt 357 models from 1987-2005 and Peterbilt 378 models from 1986-2007. The mounting brackets and stack diameters (typically 5", 6", or 7") are standardized across these years. However, custom exhaust configurations or aftermarket modifications may require adapter kits. We recommend measuring your current exhaust outlet diameter and checking clearance from the cab before ordering.

How difficult is the installation process, and what tools do I need?

Installation typically takes 2-4 hours for experienced mechanics or dedicated DIYers. You'll need basic hand tools including socket wrenches, a torque wrench, and potentially a sawzall for trimming existing exhaust pipes. Most installations require loosening the exhaust clamps, removing old stacks, and securing new ones with provided band clamps. Some models may need minor bracket adjustments. Professional installation runs $150-300 if you prefer expert help.

What stack styles and top options are available, and how do they affect performance?

We offer straight cut, curved, mitered, and bull hauler styles in both single and dual configurations. Stack tops include straight cut, turn-out, curved, and weather-cap designs. While aesthetic preferences vary, curved tops and weather caps provide better rain protection. Straight pipes offer slightly less exhaust restriction but may allow moisture entry when parked. Stack diameter affects sound - larger diameters produce deeper tones while maintaining proper exhaust flow.

How do I maintain the chrome finish and prevent rust or discoloration?

Regular maintenance extends chrome life significantly. Wash stacks monthly with mild soap and water, avoiding abrasive cleaners. Apply quality chrome polish every 2-3 months, or monthly in winter salt conditions. Blue discoloration near the base is normal from heat but can be minimized with heat shields. For trucks running hot or with frequent idle time, consider ceramic-coated options. Inspect clamps quarterly and retighten as needed to prevent exhaust leaks that accelerate corrosion.