Frequently Asked Questions About Kenworth T700 Chrome Stacks & Tops

What size exhaust stacks fit the Kenworth T700, and how do I measure for the correct diameter?

Kenworth T700 models typically accommodate 5-inch or 6-inch diameter stacks, depending on your exhaust system configuration. To determine the correct size, measure the outside diameter of your existing exhaust pipe or stack base. Most T700s from 2011-2019 come standard with 5-inch exhaust systems, while some heavy-haul configurations may have 6-inch systems. Always measure twice before ordering, as stack diameters are based on the inside diameter of the stack that fits over your exhaust pipe.

Will these chrome stacks work with my T700's emission systems and DPF setup?

Yes, our chrome stacks are designed to work with T700 models equipped with DPF (Diesel Particulate Filter) and DEF (Diesel Exhaust Fluid) systems. However, you must ensure proper clearance between the stack and any emission components. For 2011 and newer T700s with aftertreatment systems, we recommend curved or angled stacks that direct exhaust away from the cab and maintain at least 6 inches of clearance from DEF tanks and wiring harnesses. Straight stacks can work but may require additional bracket modifications.

How difficult is the installation, and what tools or modifications are required?

Installation typically takes 2-4 hours and requires basic hand tools including wrenches, a drill with metal bits, and potentially a sawzall for trimming. Most installations involve removing the existing stack, installing new clamps and brackets (usually included), and securing the new stack. Some T700 models may require drilling 2-4 new holes in the frame rail for bracket mounting. Professional installation is recommended if you need to modify exhaust routing or lack experience with heavy-duty truck components.

What's the difference between 304 and 316 stainless steel stacks, and which is better for my T700?

304 stainless steel stacks offer excellent corrosion resistance and mirror-like finish for most applications and are more budget-friendly. 316 stainless steel contains molybdenum, providing superior resistance to road salt, chemicals, and coastal environments. For T700s operating in northern states with heavy road salt use or coastal areas, 316 stainless is worth the extra investment. Both grades polish to the same brilliant finish, but 316 will maintain its appearance longer under harsh conditions.

Do chrome stack tops/raincaps affect exhaust flow or engine performance on my T700?

Quality chrome stack tops and raincaps are designed to maintain proper exhaust flow without creating excessive back pressure. Curved tops and most bull hauler styles have minimal impact on performance when properly sized. However, some heavily restricted or decorative tops can create 1-2 PSI of additional back pressure. For T700s with modern emissions equipment, we recommend open-style or minimally restrictive tops to prevent any interference with DPF regeneration cycles. Always ensure the top's inlet diameter matches your stack size for optimal flow.