Diesel Stack Kits - How to Choose and Install Them on Your Truck

An Introduction to Diesel Stack Kits

Diesel trucks have become increasingly popular over the past decade, especially for truck enthusiasts and professionals who rely on their rigs for work. One way diesel owners like to customize and upgrade their trucks is by installing an aftermarket diesel exhaust stack kit. These stack kits give trucks a unique look while also enhancing exhaust flow.

What is a Diesel Stack Kit?

A diesel stack kit refers to the large vertical exhaust pipes that are mounted behind the cab of a truck. Most diesel pickup trucks come stock with a single exhaust pipe on each side. But aftermarket companies offer kits that replace the single pipes with large, chrome 4 or 5-inch diameter stacks.

Full stack kits include two vertical exhaust stacks, mounting hardware, and the necessary exhaust piping to route the exhaust through the stacks. The stacks mount to the truck's frame or bed sides using sturdy mounting brackets. Diesel stacks are strictly cosmetic add-ons and do not increase horsepower or performance on their own.

Benefits of Adding Stacks to Your Diesel Truck

There are a few key reasons truck owners add these eye-catching stacks:

• Aesthetic appeal - Stacks give trucks a custom, raised appearance that stands out.
• Exhaust flow - The large diameter stacks optimize and increase exhaust flow compared to factory pipes.
• Sound - Increased flow translates to a deeper, throatier exhaust tone.
• Smoke - With free-flowing stacks, smoke output is increased for drivers who want to "roll coal."

Popular Diesel Stack Styles

There are many styles of stack kits for different makes and models. Here are some of the most popular configurations:

Straight Stacks

The simplest and most common style, straight stacks stand vertically behind the cab. They typically range from 4 to 8 inches in diameter and 1 to 3 feet tall. Straight stacks maintain the classic diesel truck look.

Angle Cut Stacks

Angled stacks are cut at roughly 45 degrees at the top to create a distinct look. The angled cut also helps optimize exhaust flow by allowing upward momentum.

Turnout Stacks

These stacks feature a bend about two-thirds of the way up and turn outward, away from the truck's body. This creates a very prominent, attention-grabbing style.

Smokestacks

Extremely large diameter stacks, ranging from 6 to 8 inches across. Made for maximum exhaust volume and smoke output.

Popular Brands of Diesel Stack Kits

High quality stainless steel and polished aluminum stacks are produced by these leading manufacturers:

• Flo-Pro - American made stacks for Chevy, Ford, and Dodge trucks. Known for tig-welded stainless and aluminum construction.
• MBRP - Canadian manufacturer offering angled and turnout stacks for Ford, Chevy, GMC, and Ram trucks.
• Dynatech - American company producing race-inspired SuperMax stacks in stainless and polished aluminum.
• Black Tip - Australian maker of stainless steel stacks for Ford and Dodge trucks.

Factors to Consider Before Buying Stacks

There are a few important considerations when shopping for and installing diesel stacks:

• Diameter and Height - Make sure to get properly sized stacks for your truck's exhaust volume.
• Cab Clearance - Measure to ensure the stacks clear your truck cab and sleeper.
• Mounting Style - Determine the optimal mounting style for your application.
• Noise Laws - Check local noise ordinances before installing stacks if sound level is a concern.
• Exhaust Modifications - Extra exhaust modifications may be needed for optimal flow through stacks.

Installing Your Diesel Exhaust Stack Kit

Installing a stack kit takes some mechanical ability, but can be done at home with common tools and a bit of time. Here is the basic process:

1. Lift the truck safely using jacks or ramps to access the frame and exhaust.
2. Remove the factory exhaust pipes where you'll mount the stacks.
3. Bolt the stack mounting brackets to the truck frame or bedsides.
4. Cut and position the included exhaust tubing to route exhaust into the stacks.
5. Clamp or weld all exhaust connections.
6. Mount the stacks to the brackets.
7. Tighten all hardware and clamps.
8. Lower the truck and start the engine to test for leaks.

Many truck owners have their stacks professionally installed for convenience and to ensure a leak-free setup. But DIY installation can save on labor costs if you're handy with tools.

Conclusion

Adding an aftermarket diesel stack kit is an eye-catching way to customize your Ford, Chevy, or Dodge diesel pickup. Quality stainless or aluminum stacks from top brands not only look great, but can improve exhaust flow and sound compared to restrictive factory exhaust. Just be sure to measure properly for fitment and check local laws before rolling out with your shiny new stacks!

FAQs

Do stacks actually increase horsepower?

No, diesel stacks themselves do not increase horsepower or performance. They are solely an aesthetic upgrade. However, some people add them along with actual performance mods like improved intake and exhaust systems, which can increase power.

Are stacks legal to run on public roads?

Legality depends on local laws. Many areas restrict modifications that increase exhaust noise over certain decibel levels. Larger stacks often create more noise, so check your local ordinances. Police may prohibit running stacks if they deem them too loud.

Should I tune my truck if I add stacks?

It's a good idea to get a custom tune when adding stacks to optimize engine performance. Tuning allows the engine computer to account for the increased airflow and backpressure changes from the stacks.

What's better - stainless steel or aluminum stacks?

Stainless and aluminum both work well. Stainless has excellent corrosion resistance while aluminum is lighter weight. Polished aluminum has a bright chrome-like finish. Personal preference determines the better option.

Will smokestacks increase rolling coal?

Yes, large diameter smokestacks allow more unburnt fuel to exit the exhaust for bigger smoke output. But this practice can be illegal in many areas due to pollution laws.