The aFe 49-46126-B cat-back uses 2.5-inch MIG-welded, mandrel-bent 409 stainless tubing with a free-flowing stainless muffler and two 3.5-inch black 304 stainless clamp-on tips ahead of the passenger rear tire. The exact current application covers 2017-2024 Titan gas V8-5.6L, while the older selected guide ends at 2023. Match the named year ranges and actual cab/bed limits below.
Match 139.8-inch wheelbase with the listed standard/single cab and 8-foot bed, King Cab and 6.6-foot bed, or crew cab and 5.6-foot bed. The primary and guide use different standard/long/short bed names for the same dimensions; actual cab, dimensions and wheelbase control. No longer-wheelbase application is inferred. The exact current manufacturer application table and selected guide identify Titan, not Titan XD. Existing Titan XD 2016-2018 named groups are positive in the exact-part retailer table but remain UNVERIFIED against current manufacturer scope. They are retained as legacy data, not cleared for ordering or installation. Obtain exact manufacturer approval for the actual XD gas configuration; omission alone is not proof of physical incompatibility. No new XD S mapping is added. The full exact-part named table supports extending four existing Titan groups: Platinum Reserve, PRO-4X and SV through 2024, S through 2023; SL remains through 2021. No new named groups are added.
| Years | Make | Model | Submodel | Application qualification |
|---|---|---|---|---|
| 2017-2024 | Nissan | Titan | Platinum Reserve | Gas V8-5.6L; listed cab/bed and 139.8-inch wheelbase only |
| 2017-2024 | Nissan | Titan | PRO-4X | Gas V8-5.6L; listed cab/bed and 139.8-inch wheelbase only |
| 2017-2023 | Nissan | Titan | S | Gas V8-5.6L; listed cab/bed and 139.8-inch wheelbase only |
| 2017-2021 | Nissan | Titan | SL | Gas V8-5.6L; listed cab/bed and 139.8-inch wheelbase only |
| 2017-2024 | Nissan | Titan | SV | Gas V8-5.6L; listed cab/bed and 139.8-inch wheelbase only |
| 2016-2018 | Nissan | Titan XD | Platinum Reserve | UNVERIFIED legacy - exact manufacturer confirmation required |
| 2016-2018 | Nissan | Titan XD | PRO-4X | UNVERIFIED legacy - exact manufacturer confirmation required |
| 2016-2018 | Nissan | Titan XD | SL | UNVERIFIED legacy - exact manufacturer confirmation required |
| 2016-2018 | Nissan | Titan XD | SV | UNVERIFIED legacy - exact manufacturer confirmation required |
| Detail | Value |
|---|---|
| Manufacturer Part Number | 49-46126-B |
| Product type | Catback |
| Construction and exit | 2.5-inch MIG-welded, mandrel-bent 409 stainless tubing with a free-flowing stainless muffler and two 3.5-inch black 304 stainless clamp-on tips ahead of the passenger rear tire |
| Cab, bed and wheelbase | Match 139.8-inch wheelbase with the listed standard/single cab and 8-foot bed, King Cab and 6.6-foot bed, or crew cab and 5.6-foot bed. The primary and guide use different standard/long/short bed names for the same dimensions; actual cab, dimensions and wheelbase control. No longer-wheelbase application is inferred. |
| Mounting parts and original hardware | Remove the front OE hanger mount and install supplied bracket #2 05-46278. Remove the rear OE hanger mount and install supplied hanger bracket #1 05-46277 and isolation mount 05-46050 using OE bolts. Support the muffler with a jack stand during installation. The diagram/photo references establish these selected parts; no early-generation rear bracket is substituted. |
| Packing or installation qualification | Side steps may interfere. The exact current primary describes no cutting. Front flange connections use original nuts. No selected numeric torque, battery, sensor, ground-strap or crossmember instruction is printed. |
| Front seals | The selected sheet retains original front-flange hardware but lists no new front gaskets and prints no front-gasket reuse/replacement instruction. Confirm correct flange sealing service for the actual vehicle before disassembly. |
| Tightening and mileage | No numeric torque is printed. Align complete system and tips before final tightening. Maintain at-least-1/2-to-1-inch tailpipe/body clearance. Recheck after 50-100 miles: all clamps and bolts. |
| Power and chart identity | The Rebel primary claims +18 hp/+24 lb-ft, but its linked chart explicitly identifies the different 49-46125 single-exit system. It does not independently establish measured gains for this selected dual mid-side Rebel. The linked full chart is for a 2017 Titan PRO-4X 5.6L and identifies aFe 49-46125 Single Exhaust, without a finish suffix. At 3,871 rpm it shows 258.31 versus 240.89 hp and 350.50 versus 326.86 lb-ft: +17.42 hp/+23.64 lb-ft. Separate peaks differ by +15.13 hp and +18.01 lb-ft at different peak speeds. Baseline July 18, 2017 uses SAE 1.04; exhaust run August 22 uses SAE 1.02. Both list OE intake/manifold and fourth gear, but their notes differ: baseline OE ECU/headers/exhaust, 275/70R18, open hood/large fan; exhaust run OE wheels, Sport Mode, traction control off, 2,000-rpm start/black fan. Conditions differ; this is not every-vehicle or finish-comparison proof. |
| Legacy XD qualification | The exact current manufacturer application table and selected guide identify Titan, not Titan XD. Existing Titan XD 2016-2018 named groups are positive in the exact-part retailer table but remain UNVERIFIED against current manufacturer scope. They are retained as legacy data, not cleared for ordering or installation. Obtain exact manufacturer approval for the actual XD gas configuration; omission alone is not proof of physical incompatibility. No new XD S mapping is added. |
aFe Power develops application-specific intake, filtration, exhaust, cooling, tuning, suspension, drivetrain, and truck-performance components supported by product testing and documented installation requirements.
It is the selected muffler-equipped dual mid-side black-tip Rebel cat-back for the listed current Titan gas 5.6L applications.
Which cab and bed configurations are listed?Match 139.8-inch wheelbase with the listed standard/single cab and 8-foot bed, King Cab and 6.6-foot bed, or crew cab and 5.6-foot bed. The primary and guide use different standard/long/short bed names for the same dimensions; actual cab, dimensions and wheelbase control. No longer-wheelbase application is inferred.
Is Titan XD fitment cleared?The exact current manufacturer application table and selected guide identify Titan, not Titan XD. Existing Titan XD 2016-2018 named groups are positive in the exact-part retailer table but remain UNVERIFIED against current manufacturer scope. They are retained as legacy data, not cleared for ordering or installation. Obtain exact manufacturer approval for the actual XD gas configuration; omission alone is not proof of physical incompatibility. No new XD S mapping is added.
What is supplied?one driver front pipe 05-144353, one passenger front pipe 05-144354, one muffler 05-144270, one dual tailpipe assembly 05-144271, four 2.5-inch bands 05-41061, hanger bracket 05-46277, front bracket #2 05-46278, isolation mount 05-46050 and two selected black 304 stainless tips 49T30352-B09. Polished alternative tips are not additional included parts.
Which mounting parts are restored or replaced?Remove the front OE hanger mount and install supplied bracket #2 05-46278. Remove the rear OE hanger mount and install supplied hanger bracket #1 05-46277 and isolation mount 05-46050 using OE bolts. Support the muffler with a jack stand during installation. The diagram/photo references establish these selected parts; no early-generation rear bracket is substituted.
What source gap must be resolved before work?Side steps may interfere. The exact current primary describes no cutting. Front flange connections use original nuts. No selected numeric torque, battery, sensor, ground-strap or crossmember instruction is printed. The selected sheet retains original front-flange hardware but lists no new front gaskets and prints no front-gasket reuse/replacement instruction. Confirm correct flange sealing service for the actual vehicle before disassembly.
What torque, clearance and mileage check apply?No numeric torque is printed. Align system and tips before final tightening. Maintain the selected guide's at-least-1/2-to-1-inch tailpipe/body spacing and recheck after 50-100 miles: all clamps and bolts.
Does the dyno establish the selected system's gain?The Rebel primary claims +18 hp/+24 lb-ft, but its linked chart explicitly identifies the different 49-46125 single-exit system. It does not independently establish measured gains for this selected dual mid-side Rebel. The linked full chart is for a 2017 Titan PRO-4X 5.6L and identifies aFe 49-46125 Single Exhaust, without a finish suffix. At 3,871 rpm it shows 258.31 versus 240.89 hp and 350.50 versus 326.86 lb-ft: +17.42 hp/+23.64 lb-ft. Separate peaks differ by +15.13 hp and +18.01 lb-ft at different peak speeds. Baseline July 18, 2017 uses SAE 1.04; exhaust run August 22 uses SAE 1.02. Both list OE intake/manifold and fourth gear, but their notes differ: baseline OE ECU/headers/exhaust, 275/70R18, open hood/large fan; exhaust run OE wheels, Sport Mode, traction control off, 2,000-rpm start/black fan. Conditions differ; this is not every-vehicle or finish-comparison proof.
California Proposition 65 warning: this product can expose you to chemicals known to the State of California to cause cancer and reproductive harm.
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