Quick Answer: 2016–2018 Titan XD 4-Inch Exhaust
On the 2016–2018 Nissan Titan XD 5.0L Cummins 4-inch route, loosely fit the front flange pipe, then seat all four intermediate-pipe hangers. Add the straight center section and over-axle pipe. Reuse the original tailpipe bracket: engage it on the new tailpipe before bolting it back to the truck. Align the route before tightening front to rear.
Before you start: Keep the Titan XD rear bracket and four-hanger layout in view while you work. The illustrated guide shows the parts and support positions used in this 4-inch system: 2016–2018 Titan XD 4-Inch Exhaust Installation PDF.
Why The Rear Bracket Matters On Your Titan XD
Before you take the truck apart, set aside a safe place for the original tailpipe bracket and its bolts. This kit reuses that mount. Losing it can stop the job even when every new pipe is in the box.
Start by matching your truck and the parts on the floor to this guide. The checks below follow the exhaust from the front flange to the tailpipe, so you can confirm each support before moving on.
U.S. emissions rules prohibit tampering with certified controls. A race-use label alone does not establish an exemption.
Match Your Titan XD And 4-Inch Kit
| Vehicle or layout check | What applies here |
|---|---|
| Truck covered | 2016–2018 Nissan Titan XD 5.0L Cummins diesel. |
| Replacement route | 4-inch downpipe-back with a straight center section. |
| Front connection | Compare the three-hole flange and position-specific hardware. |
| Intermediate supports | All four metal hanger rods point forward in the illustrated arrangement. |
| Original parts retained | Tailpipe bracket, rubber support and mounting bolts. |
Before You Remove Anything: This guide covers the 2016–2018 Nissan Titan XD 5.0L Cummins 4-inch downpipe-back layout. It does not cover a gasoline Titan or a retained-DPF rear-only system. Check the three-hole front flange, pipe diameter, four intermediate supports and original rear bracket before starting.
Titan XD Parts And The Bracket You Reuse
| Component name | Illustrated manual reference | How to identify or fit it |
|---|---|---|
| Front flange pipe | 22712 | Bolts to the retained downpipe. |
| Four-hanger intermediate pipe | 22753 | The illustrated hanger rods point toward the front of the truck. |
| Straight center section | 50220 | Connects the intermediate and over-axle sections. |
| Over-axle pipe | 22756 | Fit behind the straight section with the rear supported. |
| Tailpipe | 22757 | Uses the original tailpipe bracket and rubber support. |
| Original tailpipe mount and bolts | Retained truck parts | Remove for access, then refit after engaging the new tailpipe. |
Use the shapes, pipe ends and welded supports in this drawing to match the components listed above.
Prepare The Saved Mount, Hardware And Pipe Supports
| Tool Or Equipment | What You Need It For |
|---|---|
| Flange and clamp tools | Match sockets and wrenches to the supplied bolts. The PDF identifies 3/8-inch and 7/16-inch bolt sizes, not wrench sizes. |
| Support and protection | Exhaust stands, approved vehicle supports, gloves and eye protection. |
| Final tightening | Torque wrench; use the specification for the actual bolts and clamps. No torque value is supplied by this PDF. |
Start with a cold exhaust. Support the truck by the approved method and support each heavy pipe before release. Never work under a jack alone.
Phase 1: Disconnect The Stock Route And Retain The Rear Mount
Installer Tip: Set the reused tailpipe bracket and its bolts apart from the old exhaust. You will need that mount when the new tailpipe goes in.
Step 1: Label And Unplug The Stock Connections
Follow each sensor wire to its clip connection, as shown in the PDF. Release the plug rather than twisting the lead with the pipe. Label the connections and keep them clear of the removal path.
Step 2: Keep The Stock Rear Bracket
Support the exhaust. Release the two flange joints and the clamp at the filter outlet. Remove the stock tailpipe-hanger mount to free the rear pipe. Save the mount and its bolts for the new tailpipe.
Original tailpipe-hanger mount to retain and reuse. ES09034.
Phase 2: Set The Front Flange And Four-Hanger Mid-Pipe
Step 3: Fit The Front Flange Pipe
Seat the front flange pipe at the retained downpipe. The illustrated hardware uses a 3/8-inch bolt in the top hole and 7/16-inch bolts in the lower two holes. These are bolt diameters, not socket sizes. Start the matching bolts by hand and leave the joint adjustable; do not enlarge an unmatched hole.
Step 4: Point The Four Mid-Pipe Hangers Forward
Join the intermediate pipe to the front section with the clamp already on it. Engage all four metal rods in their stock rubber mounts, pointing toward the front of the truck as illustrated. Keep every mount seated and free of sideways twist before adding the rear pipes.
Phase 3: Join The Rear Pipes And Reuse The Bracket
Step 5: Add The Center And Axle Sections
Add the straight center section, then fit the over-axle pipe. Place clamps on the connections before joining them. Support the free rear end while lining up the tailpipe and saved bracket.
Step 6: Refit The Saved Tailpipe Bracket
With the saved bracket still free, put its rubber onto the new tailpipe hanger. Join the tailpipe to the over-axle pipe, then bolt the original bracket back to the truck. Keep the adjacent pipe joints loose until the bracket and outlet align; do not bolt the bracket down first and bend the rod to reach it.
If the Bracket Holes Miss, Recheck All Four Center Hangers
Support the tailpipe and release the adjacent loose joints. Check that all four intermediate rods point forward and sit fully in their rubber mounts. Correct the center position, then align the free rear bracket with the truck.
No default wheelbase trim is specified for this illustrated route. Check pipe order and insertion before cutting a straight section that appears too long.
Step 7: Align And Secure The Route
Check all four mid-pipe hangers, the rear bracket and the pipe clearance. Tighten evenly from the front flange toward the rear. Use the proper specs for the actual clamps and bolts.
Final Check: Four Center Mounts And The Rear Bracket
- Front hardware: The illustrated top/lower bolt positions match the supplied hardware; bolt diameter is not wrench size.
- Intermediate pipe: All four metal rods face forward and sit fully in their rubber mounts.
- Saved bracket: Original rubber, bracket and bolts are refitted after engaging the tailpipe hanger.
- Rear route: Pipe joint and bracket align without pulling the center supports sideways.
Before use, have the joints checked for leaks with the proper shop method. Do not run the engine in a closed space. If there is a new rattle, soot trace or loose support, let the exhaust cool and correct the cause. Follow the supplied hardware maker’s heat-cycle recheck instructions.
Troubleshoot The Saved Bracket And Sideways Rubber Mounts
| What you find | What to check before changing parts |
|---|---|
| Rear bracket will not line up | Keep the bracket free until its rubber is on the tailpipe rod. Check all four center supports, then adjust the loose joints. |
| Front bolt will not enter a lower hole | Check the illustrated bolt-diameter positions and actual flange match. Do not enlarge the hole to force an unmatched part. |
| One center isolator is twisted | Release the adjacent joints, confirm pipe orientation and reseat all four hangers before tightening. |
Keep the original rear mount and choose the standalone 4-inch option when this is an exhaust-only job. The link opens 4" Downpipe Back. It does not select the 5-inch or underhood combination package. View 4" Downpipe Back
[[product-recommend:1]]Before Use: Calibration And Leak Checks
Arrange the compatible calibration and any device or service your exact package needs before use. Exhaust fitting does not include ECU programming. Diagnose warning lights, reduced power or leaks before operating the truck.
Conclusion
The job is complete when all four center hangers point forward, the saved rear bracket is bolted back on, and the tailpipe clears the truck. Check the joints for leaks and recheck the clamps as their maker directs after heat cycling.
For related parts on the same platform, browse Titan 5.0L Cummins parts.
Choose The Titan XD 4-Inch Layout
Use the vehicle and option table above to match your build. The collection includes other pipe sizes and layouts, so keep the exact option name with your parts list.
References
Flo-Pro Titan rear-support reference — Cross-check the applicable support and routing notes; do not transfer another system’s cut lengths or hardware settings.
- SPEtuner: "ES09034 illustrated installation instructions." Available from SPEtuner installation PDF.
- U.S. Environmental Protection Agency: "EPA Fact Sheet re Aftermarket Defeat Devices and Tampering." Available from U.S. Environmental Protection Agency.
- Cover photo: "Rutger van der Maar: "2016 Nissan Titan XD 5.0 V8 Diesel (46995265372).jpg — CC BY 2.0. Layout added; vehicle photo retained. https://creativecommons.org/licenses/by/2.0." Available from Cover photo: Rutger van der Maar.
FAQ
Q: Can I Use It For A 2019 Titan XD?
A: The cover lists 2016–2018. Get the later-year application confirmed first.
Q: Which Stock Bracket Must I Keep?
A: The tailpipe-hanger mount. It is reused on the new tailpipe hanger.
Q: Which Way Do The Four Intermediate Hangers Point?
A: Toward the front of the truck in the illustrated arrangement. Seat all four in their stock rubber mounts before setting the rear bracket.
Q: Which Front Flange Bolt Goes In The Top Hole?
A: The illustrated top bolt is 3/8 inch in diameter; the lower two are 7/16 inch. These are bolt diameters, not wrench sizes.
Q: Why Will The Saved Bracket Holes Not Line Up With The Body?
A: Leave the upstream joints adjustable and check the tailpipe’s engagement on the axle pipe. Also check that all four center hangers are correctly seated before forcing the bracket.
Q: Does This Layout Use A Muffler Or A Straight Center Section?
A: The illustrated 4-inch route uses a straight center section ahead of the over-axle pipe. Follow the actual selected layout rather than adding a muffler from another version.
Lars
Diesel Performance Engineer | 15+ Years Experience
"Empower Your Beast: Run Cooler, Pull Harder, Last Longer."
