Gibson 98021 Stainless Dual Exhaust System
$819.90 price checked August 2026
If you require a durable T-304 polished stainless steel build with large 4.0 inch tips, this is the one.
Gibson 98021 Exhaust Overview
The Gibson 98021 Stainless Dual Exhaust System is for truck owners who need a high-durability upgrade, as it features T-304 polished stainless steel construction.
Restricted flow from undersized piping or restrictive baffles can create backpressure that reduces horsepower and increases exhaust gas temperatures. This is a common issue when choosing a dual exhaust kit that does not prioritize proper diameter and material flow.
The Gibson 98021 Exhaust provides a 2.25″ stainless tubing diameter to maintain consistent flow while utilizing a louvered and chambered design. This configuration allows for a more balanced sound and performance profile than many standard alternatives.
We compared the Gibson 98021 Exhaust against the other dual exhaust system options we evaluated for this category. This review is for buyers who prioritize material longevity and specific diameter requirements for their vehicle.
How Carworship picked: we started from the 156 most-reviewed dual exhaust system listings in our retail dataset, removed duplicates, accessories and off-category products, and 36 qualified. This product is one of 10 from that pool chosen for a full review. Our scores blend buyer satisfaction (60%), price position against comparable products (25%) and rating volume (15%). Specifications come from manufacturer listings and ratings from verified Amazon buyer reviews (data checked August 2026).
The Short Answer on the Gibson 98021 Exhaust
Best for: you need a durable, polished T-304 stainless steel upgrade that maintains a high-flow louvered design without internal packing.
The Gibson 98021 Exhaust is a solid choice for this upgrade at approximately $819.90.
- Pro: T-304 polished stainless steel offers superior corrosion resistance compared to standard aluminized steel.
- Pro: The 2.25″ tubing provides a consistent flow diameter to reduce backpressure.
- Pro: 4.0″ intercooled exhaust tips provide a large, consistent outlet diameter.
- Con: The lack of internal packing may result in a louder exhaust note that lacks the dampening of a competition-grade system.
- Con: A 3.2 rating from 27 buyers suggests some users may find the fitment or sound profile inconsistent with their expectations.
Don’t buy this if: you require a competition-grade system with mandrel bends, as this kit uses standard louvered and chambered designs.
Price assessment: The $819.90 price point is fair for a T-304 stainless steel system with 4.0″ tips.
Carworship score: 5.1/10 (data-driven – see “How we picked” above)
If you are looking for a reliable daily driver, compare the best dual exhaust system for daily performance to see which brands offer the best balance of sound and reliability.
Specifications in Full
| Manufacturer Part Number | 98021 |
| Material | T-304 polished stainless steel |
| Pipe Diameter | 2.25″ |
| Exhaust Tip Size | 4.0″ |
| Weight | 35 Pounds |
| Dimensions | 38 x 22 x 13 inches |
| Warranty | One Year Limited Warranty |
The T-304 polished stainless steel construction provides a higher corrosion resistance than standard aluminized steel options.
Where this sits in the buyer data: Among the 23 products screened for this category, this one’s 3.2 rating places it #21, on 27 ratings – above the 6-rating median of that group, so the average rests on more feedback than most of its comparables. On price it undercuts 4 of them.
Before You Buy: Gibson 98021 Exhaust Checklist
The first thing to check is whether your truck’s chassis and exhaust ports align with a 2.25″ tubing layout to avoid frame modifications.
- ☐ Confirm your vehicle’s exhaust port diameter matches the 2.25″ Stainless Tubing — 2.25″
- ☐ Measure the clearance for the 4.0″ Intercooled Exhaust Tips — 4.0″
- ☐ Verify the T-304 polished stainless steel grade meets your corrosion resistance needs — T-304
- ☐ Budget for the Gibson 98021 Exhaust price point — $819.90
- ☐ Confirm your installation site allows for a louvered and chambered design with no internal packing — No internal packing
You should not buy this dual exhaust system if your project requires an internal-packed muffler to dampen specific resonance frequencies.
What These Specifications Let You Do
T-304 Polished Stainless Construction
T-304 polished stainless steel provides higher corrosion resistance than aluminized steel. This material grade ensures the Gibson 98021 Exhaust maintains its structural integrity against road salt and moisture over long-term use.
If you prioritize longevity over lower initial costs, the T-304 grade provides a durable alternative to standard carbon steel. You should confirm your local installation requirements, as professional fabrication may be required for certain mounting configurations.
Louvered Chambered Design
The louvered and chambered design of the Gibson 98021 Exhaust manages sound waves by directing exhaust gases through internal chambers. This design produces a deeper tone compared to the stock system while reducing the resonance and drone often caused by simple straight-pipe configurations.
The 2.25″ tubing diameter is sized to balance flow and backpressure. This diameter helps maintain low-end torque for towing or hauling while providing a more aggressive exhaust note than the factory setup.
Large Intercooled Tip Diameter
The 4.0″ intercooled exhaust tips provide a large exit point for gas flow. These tips help reduce exit velocity at the tip, which can minimize the risk of heat shielding failure by distributing heat more evenly across the exterior of the tailpipe.
The 4.0″ diameter ensures the Gibson 98021 Exhaust does not restrict flow at high RPMs. You should verify your vehicle’s rear bumper clearance to ensure these tips fit without obstruction before ordering.
How the Gibson 98021 Exhaust Compares to Alternatives
The Gibson 98021 Stainless Dual Exhaust offers a balance of high-grade materials and standard-diameter flow that distinguishes it from lower-tier aluminized options.
- The Gibson 98021 Exhaust costs $30.09 less than the Gibson 98022 Black Ceramic Dual Exhaust System while providing the same 2.25″ stainless tubing.
- The Gibson 98021 Exhaust features T-304 polished stainless steel, which provides superior corrosion resistance against road salt compared to the aluminized steel found on the Gibson 17405 Dual Exhaust System.
- The Solo Performance 994184SL Cyclone Dual Exhaust System provides 5″ dual cat back piping, whereas the Gibson 98021 Exhaust utilizes 2.25″ stainless tubing.
- The Gibson 98021 Exhaust is priced $60.63 higher than the Gibson Performance Exhaust 65649 Extreme Dual Exhaust, which offers 3-inch mandrel-bent tubing instead of 2.25″ tubing.
- The Gibson 17405 Dual Exhaust System carries a 5.0 rating, while the Gibson 98021 Exhaust holds a 3.2 rating from 27 buyer ratings.
If you require the maximum flow capacity provided by 3-inch tubing, choose the Gibson Performance Exhaust 65649 Extreme Dual Exhaust instead of this 2.25″ system.
Gibson 98021 Exhaust Buying Questions Answered
Is the Gibson 98021 Stainless Dual Exhaust worth the price without internal packing?
The Gibson 98021 Exhaust provides a louvered and chambered design to manage exhaust tone despite having no internal packing. This chambering helps mitigate the resonance and drone that often occur with straight-pipe systems while maintaining the flow of the 2.25″ stainless tubing.
Does the Gibson 98021 Stainless Dual Exhaust fit my vehicle?
No, you must confirm your specific vehicle’s year, make, and model compatibility before ordering. Because exhaust systems require precise fitment to avoid heat shielding failure or restricted flow, a qualified installer should verify the mounting points against the provided kit specifications.
What material is the Gibson 98021 Stainless Dual Exhaust made of?
The Gibson 98021 Exhaust uses T-304 polished stainless steel, which is a standard for high-quality corrosion resistance. This material grade offers a durable alternative to aluminized steel and ensures the 4.0″ intercooled exhaust tips remain intact over time.
How does the Gibson 98021 Stainless Dual Exhaust affect performance?
The 2.25″ tubing diameter is designed to balance exhaust flow with backpressure. By using a louvered and chambered design, the system aims to provide a distinct sound and improved flow compared to restrictive stock mufflers.
Is the Gibson 98021 Exhaust Right for You?
The Gibson 98021 Exhaust suits 5 kinds of buyer and is the wrong choice for 3 jobs, listed below with the reason for each.
Who the Gibson 98021 Exhaust is for, and what it does well
Who the Gibson 98021 Exhaust suits
- Off-road truck owners — the T-304 polished stainless steel provides corrosion resistance for muddy environments
- Custom truck builders — the 4.0″ intercooled exhaust tips provide a high-visibility aesthetic for show trucks
- Daily commuters with heavy-duty trucks — the louvered and chambered design balances exhaust flow with manageable noise
- Diesel truck owners — the 2.25″ stainless tubing provides the necessary diameter for high-volume exhaust flow
- Fleet owners looking for durability — the one-year limited warranty and T-304 grade material ensure long-term reliability
What the Gibson 98021 Exhaust handles well
- High-volume exhaust flow — 2.25″ stainless tubing
- Corrosion-prone environments — T-304 polished stainless steel
- Visual customization — 4.0″ intercooled exhaust tips
- Balanced sound modulation — louvered and chambered design
- Maintenance-free operation — no internal packing to clog or degrade
What the Gibson 98021 Exhaust is the wrong choice for
- Ultra-quiet stealth operation — no internal packing leads to a louder exhaust note
- High-performance racing applications — 2.25″ tubing may restrict flow compared to larger diameters
- Budget-conscious builds — the T-304 polished stainless steel and 4.0″ tips command a premium price
What to budget alongside the Gibson 98021 Exhaust, and what to skip
Worth buying at the same time
- Exhaust hangers — needed to secure the 2.25″ tubing to the vehicle chassis
- Flange adapters — required to connect the stainless tubing to the engine manifold
- Exhaust clamps — necessary to maintain a seal on the T-304 stainless steel joints
- Heat shields — needed to protect the bodywork from the T-304 polished stainless steel heat
- Professional installation tools — required to properly mount the louvered and chambered mufflers
What you can skip
- Packing material — the design specifically features no internal packing
- Chrome plating — the T-304 is already polished stainless steel
- Small diameter tips — the 4.0″ intercooled tips are already included
Where to Buy the Gibson 98021 Exhaust
These retailers sell Dual Exhaust System generally – we do not track which of them has this particular model in stock, so check availability and the current price with the retailer before making a trip.
- 4 Wheel Parts (online only) — specialized focus on truck and off-road exhaust systems
- Amazon (online only) — broad selection of aftermarket kits and third-party brands
- eBay (online only) — source for used, refurbished, and specialty exhaust components
- ExtremeTerrain (online only) — specialist for off-road and truck-specific exhaust systems
- AutoZone (online and physical stores) — wide availability of standard exhaust components and accessories
- O’Reilly Auto Parts (online and physical stores) — extensive inventory of exhaust systems and in-store installation support
- Summit Racing Equipment (online only) — massive selection of performance exhaust systems and specialty brands
Final Verdict on the Gibson 98021 Exhaust
You need a durable dual exhaust system that utilizes T-304 polished stainless steel and a louvered, chambered design without internal packing. The Gibson 98021 Exhaust is the right choice for this requirement at a price of around $819.90.
The Gibson 98021 Exhaust ranks well for material quality, using 2.25″ stainless tubing and 4.0″ intercooled exhaust tips to manage flow and heat. It maintains a 3.2 rating from 27 buyers, reflecting its position as a mid-range stainless steel option.
Skip it if: You require a system with internal packing for specific sound dampening or if you need a high-flow header system that exceeds the flow dynamics of a standard louvered chamber design.