Frequently Asked Questions About Volvo VNL Gen III Chrome Stacks & Tops

What sizes of chrome stacks are available for the Volvo VNL Gen III, and how do I choose the right diameter?

Chrome stacks for the Volvo VNL Gen III typically come in 5-inch, 6-inch, and 7-inch diameters. The most common choice is 5-inch for single stack setups and 6-inch for dual stack configurations. To determine the right size, measure your existing exhaust pipe diameter and consider your truck's overall appearance. Keep in mind that larger diameters may require additional brackets or modifications to your existing exhaust system.

Will these chrome stacks fit my 2017-2024 Volvo VNL, and are there any model-specific considerations?

These chrome stacks are designed specifically for Volvo VNL Gen III models manufactured from 2017 onwards, including the VNL 300, 400, 740, 760, and 860 series. However, sleeper vs. day cab configurations may affect mounting locations. The VNL 860 with its higher roof may require longer stacks for proper proportions. Always verify your specific model year and configuration before ordering, as pre-2017 VNL models have different mounting systems.

How difficult is the installation process, and what tools or additional parts will I need?

Installation typically takes 2-4 hours and requires basic hand tools including wrenches, a drill with metal bits, and possibly a sawzall for trimming. Most installations require clamps, mounting brackets, and rain caps which may need to be purchased separately. Some customers report needing to modify or relocate DEF tanks or air cleaners on certain configurations. Professional installation is recommended if you're not comfortable with exhaust system modifications.

What's the difference between 304 and 316 stainless steel options, and how long will the chrome finish last?

304 stainless steel is the standard option, offering good corrosion resistance and shine retention for most climates. 316 stainless steel contains molybdenum, providing superior resistance to salt and harsh chemicals - ideal for coastal areas or heavy winter salt exposure. With proper maintenance, quality chrome stacks maintain their mirror finish for 3-5 years. Regular polishing every 2-3 months and avoiding harsh cleaners will maximize longevity.

Can I install chrome stacks without modifying my truck's emissions equipment or voiding warranties?

Yes, chrome stacks can be installed as cosmetic additions that work with your existing exhaust system without affecting emissions equipment. They attach after the DPF and SCR systems, maintaining all factory emissions controls. However, improper installation that alters exhaust flow or damages factory components could impact warranty coverage. We recommend keeping all factory exhaust components intact and using clamp-on style installations when possible to preserve your warranty.