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The Gibson 65640 is a direct bolt-on cat-back exhaust system purpose-built for the 2010–2014 Chevrolet Tahoe and 2010–2014 GMC Yukon equipped with the 5.3L V8 engine. Part of Gibson's Dual Sport Series, the 65640 exits its polished stainless tips cleanly behind the rear tire no hanging past the bumper, no trailer-hitch clearance issues. Built from 2.25-in. 409 stainless steel, mandrel-bent tubing and backed by a Lifetime Limited Warranty, this cat-back system delivers dyno-proven power gains, an aggressive tone, and a factory-quality finish that lasts.
Why Choose the Gibson 65640?
- Dyno-Proven Power: Average gains of 10–15 horsepower and 15–20 lb-ft of torque real tested numbers. Peak gains occur in the 1,800–3,000 RPM range, exactly where a 5.3L Tahoe or Yukon spends most of its time towing, merging, and passing.
- Aggressive Sound, Zero Drone: The Gibson Superflow muffler uses a baffled and chambered design with no internal packing. Deep, authoritative tone outside the cabin with minimal interior drone critical on a daily-driven SUV.
- Dual Sport Exit: Both 3.50-in. tips exit cleanly behind the rear tire, protecting trailer coupler clearance and giving the truck a purposeful look without bumper overhang.
- 2.25-in. Mandrel-Bent Tubing: Mandrel bending preserves full tube diameter through every curve, eliminating flow restrictions that crush-bent tubing creates.
- T-304 Polished Tips: 3.50-in. round slash-cut tips in T-304 stainless a higher-grade alloy for a mirror finish that resists discoloration and corrosion season after season.
- Direct Bolt-On — No Welding: Uses factory hangers, all clamps included. Most installs take 1–2 hours with basic hand tools.
- 50-State Legal: Fully emissions-compliant in all 50 states including California. Connects downstream of the catalytic converter.
- Made in the USA: Every Gibson exhaust is fabricated domestically.
- Lifetime Limited Warranty: Gibson backs the 65640 for the life of the vehicle.
Full Specifications — Gibson 65640
| Specification | Detail |
|---|---|
| SKU / Part Number | 65640 |
| UPC | 677418023008 |
| Brand | Gibson Performance Exhaust |
| Series | Dual Sport |
| System Type | Cat-Back |
| Tubing Material | 409 Stainless Steel, Mandrel-Bent |
| Tubing Diameter | 2.25 in. |
| Tip Material | Polished T-304 Stainless Steel |
| Tip Style | Round Slash-Cut, Clamp-On |
| Tip Diameter (Outlet) | 3.50 in. |
| Tip Specs | Inlet 2.25 in. | Outlet 3.50 in. | Length 12 in. |
| Muffler Type | Gibson Superflow — Baffled & Chambered, No Internal Packing |
| Muffler Body | 8 in. Round | 3 in. Offset Inlet | 2.25 in. Dual Outlet | Length 24 in. |
| Exit Position | Behind Rear Tire |
| Sound Character | Aggressive Exterior Tone, Minimal Interior Drone |
| Horsepower Gain (avg.) | 10–15 HP (dyno-proven) |
| Torque Gain (avg.) | 15–20 lb-ft (dyno-proven) |
| Installation | Direct Bolt-On | No Welding | All Hardware Included |
| Emissions Compliance | 50-State Legal |
| Country of Origin | Made in USA |
| Warranty | Lifetime Limited Warranty |
| Weight | 52 lbs. |
| Package Dimensions | 54 in. × 20 in. × 12 in. |
| Ships Via | UPS / FedEx Ground Oversized |
What's Included
- Gibson 65640 Dual Sport Cat-Back Exhaust System
- Dual 3.50-in. Polished Round Slash-Cut T-304 Stainless Tips
- Gibson Superflow Baffled & Chambered Muffler
- All Clamps, Hardware, and Factory-Style Hangers
Exact Fitment — 2010–2014 Chevy Tahoe & GMC Yukon 5.3L
The Gibson 65640 fits the following vehicles with the 5.3L V8 engine only. Does not fit 6.0L engines or Hybrid models.
Chevrolet Tahoe
| Year | Trim | Engine |
|---|---|---|
| 2010 | LS, LT, LTZ | 5.3L V8 |
| 2011 | LS, LT, LTZ | 5.3L V8 |
| 2012 | LS, LT, LTZ, PPV, SSV | 5.3L V8 |
| 2013 | LS, LT, LTZ, PPV, SSV | 5.3L V8 |
| 2014 | LS, LT, LTZ, PPV, SSV | 5.3L V8 |
GMC Yukon
| Year | Trim | Engine |
|---|---|---|
| 2010 | SLE, SLT | 5.3L V8 |
| 2011 | SLE, SLT | 5.3L V8 |
| 2012 | SLE, SLT | 5.3L V8 |
| 2013 | SLE, SLT | 5.3L V8 |
| 2014 | SLE, SLT | 5.3L V8 |
Important: Does not fit Yukon XL, Suburban, Hybrid variants, or 6.0L engines. Unsure of your engine? Check your door jamb sticker 5.3L will show RPO code LMG or LC9.
Gibson 65640 vs. 65642 — What's the Difference?
Both fit the same 2010–2014 Tahoe and Yukon 5.3L, use identical tubing, muffler, and hardware, and produce the same power gains. The only difference is the exit layout:
- Gibson 65640 — Dual Sport: Both polished tips exit from the passenger side, tucked behind the rear tire. Clean, tow-friendly, preferred for daily drivers and trucks that haul regularly.
- Gibson 65642 — Dual Extreme: Tips exit behind each rear tire one per side. Symmetrical, wide-stance, maximum visual aggression.
Sound, power, materials, and warranty are identical on both. Choose 65640 if you tow or want a clean tucked look. Choose 65642 if you want both rear corners announced.
50-State Legal and Won't Void Your Factory Warranty
The 65640 is street-legal in all 50 states including California. It connects downstream of the catalytic converter and does not modify any emissions control equipment.
Under the Magnuson-Moss Warranty Act, a dealer cannot void your factory warranty simply because you installed an aftermarket exhaust they would need to prove the part directly caused a specific failure. The 65640 is bolt-on, does not touch engine internals or emissions hardware. Your factory powertrain warranty stays intact.
Frequently Asked Questions
Q: Does the Gibson 65640 fit a 2012 Chevy Tahoe PPV?
A: Yes. The 65640 fits 2012, 2013, and 2014 Chevrolet Tahoe PPV (Police Pursuit Vehicle) and SSV (Special Service Vehicle) models with the 5.3L V8. These trims use the same exhaust routing as the civilian LS/LT/LTZ models direct bolt-on.
Q: Does the Gibson 65640 fit the GMC Yukon?
A: Yes. Confirmed fitment for 2010–2014 GMC Yukon SLE and SLT with the 5.3L V8. The Yukon and Tahoe share the same platform and exhaust architecture on this generation.
Q: Will this clear my trailer hitch?
A: Yes, with most factory and aftermarket hitches. The Dual Sport routes tips behind the rear tire rather than past the bumper, specifically to avoid trailer coupler interference.
Q: How much HP does the 65640 add to a 5.3L Tahoe?
A: Gibson's dyno testing shows average gains of 10–15 horsepower and 15–20 lb-ft of torque, with peak gains in the 1,800–3,000 RPM band.
Q: Is the Gibson 65640 legal in California?
A: Yes, 50-state legal. It does not modify or remove any catalytic converter or upstream emissions equipment.
Q: Does it fit a Yukon XL or Suburban?
A: No, The 65640 fits the standard-wheelbase Tahoe and Yukon only not the Yukon XL or Suburban. A different Gibson part number is required for extended-wheelbase models.
Q: Is there highway drone?
A: Minimal. The Superflow's baffled and chambered design with no internal packing avoids the resonance frequencies that cause drone at cruise RPM. Owners consistently report it sounds aggressive outside but stays comfortable inside at highway speeds.
Q: What's the difference between 409 and T-304 stainless?
A: 409 stainless is used for the tubing durable and ideal for high-heat exhaust environments. T-304 is used for the tips higher chromium and nickel content gives it a brighter polished appearance and better cosmetic corrosion resistance. Gibson uses the right alloy for each part of the system.
Q: How does it ship?
A: Same or next business day via UPS or FedEx Ground Oversized. Arrives fully pre-assembled in a 54 × 20 × 12 in. box (~52 lbs.). Tracking provided automatically.
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