$595.00 USD
$595.00 USD
The Dinan D660-0090 axle-back exhaust system is a precision-engineered performance exhaust replacement designed to enhance both sound characteristics and exhaust flow efficiency. This bolt-on system features mandrel-bent T304 stainless steel construction with black ceramic-coated exhaust tips, providing a premium appearance and aggressive exhaust note while maintaining drivability for daily use.
As an axle-back system, this exhaust replaces components from the rear axle to the exhaust outlets, including the rear muffler section and tips. This design approach provides sound enhancement and minor performance improvements without requiring modifications to catalytic converters or other emissions-critical components, making it a straightforward upgrade that maintains emissions compliance.
The system utilizes Dinan's extensive engineering expertise to balance performance, sound quality, and build durability. Each component is manufactured to precise tolerances ensuring proper fitment, optimal exhaust flow, and long-term reliability under demanding operating conditions.
| Part Number | D660-0090 |
| Manufacturer | Dinan Engineering |
| System Type | Axle-Back Exhaust System |
| Primary Material | T304 Stainless Steel |
| Construction Method | Mandrel-Bent Tubing |
| Tip Finish | Black Ceramic Coating |
| Tip Diameter | 4.0 inches (per tip) |
| Tip Configuration | Dual Outlet |
| Muffler Type | Straight-Through Performance Design |
| Installation Type | Bolt-On Direct Replacement |
| Sound Level | Aggressive (Moderate Increase Over Stock) |
| Weight | Approximately 25-30 lbs (system weight varies by application) |
| Warranty | Limited Lifetime Warranty |
| Emissions Compliance | 50-State Legal (maintains factory emissions equipment) |
| Country of Manufacture | USA |
The exhaust system is constructed entirely from T304 stainless steel, a high-grade austenitic stainless steel alloy containing 18% chromium and 8% nickel. This material specification provides several critical advantages for exhaust system applications:
T304 stainless steel offers superior corrosion resistance compared to aluminized or mild steel alternatives, ensuring long-term durability even in harsh environmental conditions including road salt exposure, moisture, and temperature extremes. The alloy maintains structural integrity at elevated exhaust gas temperatures exceeding 1,500°F while resisting oxidation and scaling.
The material's mechanical properties provide excellent formability during manufacturing while maintaining strength characteristics necessary for exhaust system applications. This combination allows for precise mandrel bending while ensuring the exhaust maintains structural rigidity under thermal cycling and vibration.
All tubing bends utilize mandrel bending technology, a precision manufacturing process that maintains consistent internal diameter throughout curved sections. During mandrel bending, a solid rod (mandrel) supports the tube's interior during the bending process, preventing collapse or deformation that occurs with traditional crush bending methods.
This construction approach ensures optimal exhaust flow by eliminating restrictions at bend points. Maintaining constant internal diameter reduces turbulence, minimizes backpressure, and promotes efficient exhaust gas evacuation. The improved flow characteristics contribute to both performance optimization and the system's characteristic exhaust note.
The exhaust tips feature a black ceramic coating applied through a high-temperature curing process. This coating provides both aesthetic and functional benefits. The ceramic layer offers additional heat resistance and corrosion protection while maintaining a consistent black finish that resists discoloration and oxidation.
The ceramic coating is bonded to the stainless steel substrate at a molecular level through thermal curing, ensuring durability and resistance to chipping or peeling. This finish maintains its appearance even under sustained exposure to high exhaust gas temperatures and environmental conditions.
Straight-through muffler configuration reduces exhaust restriction while controlling sound levels through strategically placed internal chambers and sound-dampening materials.
Engineered for precise fitment using factory mounting points and connection interfaces. No modifications to vehicle structure or exhaust hangers required.
4.0-inch diameter black ceramic-coated tips provide an aggressive visual presence while complementing factory or aftermarket rear diffuser designs.
Maintains all factory emissions control components including catalytic converters and oxygen sensors. No impact on emissions testing or inspection compliance.
Optimized exhaust path reduces flow restriction compared to factory exhaust, improving exhaust scavenging efficiency and throttle response.
Utilizes OEM-style clamps and hangers for secure mounting and proper exhaust system alignment. Compatible with factory heat shields and underbody components.
The axle-back design focuses on optimizing the final section of the exhaust path, where stock systems often prioritize sound suppression over flow efficiency. The Dinan system's straight-through muffler design and mandrel-bent construction reduce flow restriction, allowing exhaust gases to exit more efficiently.
While axle-back systems provide modest horsepower gains compared to full exhaust systems (typically 5-10 horsepower depending on engine configuration), the primary performance benefit manifests as improved throttle response and enhanced engine sound character. The reduced backpressure allows the engine to evacuate exhaust gases with less pumping loss, particularly noticeable in mid-range to high-RPM operation.
The exhaust system produces a deeper, more aggressive tone compared to factory exhaust while maintaining sound levels appropriate for daily driving. The sound character emphasizes lower frequencies, providing a sporty exhaust note without excessive drone during highway cruising.
Sound levels increase most noticeably during acceleration and under load, where the straight-through muffler design allows more exhaust sound to exit unrestricted. During idle and light throttle operation, the system maintains relatively moderate sound levels suitable for residential areas and noise-sensitive environments.
The muffler internals are engineered to control specific frequency ranges that typically cause cabin drone, allowing for an engaging exhaust note without compromising interior comfort during extended driving.
The Dinan axle-back exhaust system is designed as a direct bolt-on replacement for the factory exhaust section. Installation utilizes existing mounting points, exhaust hangers, and connection interfaces without requiring modifications to the vehicle.
The installation process involves removing the factory exhaust section from the connection point at the rear axle forward to the exhaust tips, then installing the Dinan system in its place. All necessary hardware is included with the system.
Installation requires standard automotive hand tools including metric wrenches and sockets (typically 13mm-15mm), penetrating oil for loosening factory exhaust connections, and proper vehicle support equipment (jack and jack stands or automotive lift).
The use of penetrating oil on factory exhaust bolts 24 hours prior to installation is strongly recommended, as exhaust fasteners often corrode and seize due to heat cycling and environmental exposure.
Experienced technicians can typically complete installation in 1-2 hours. First-time installers should allow additional time for familiarization with exhaust system removal procedures and proper alignment during installation.
Important: Allow exhaust system to cool completely before beginning installation. Exhaust components retain heat for extended periods after engine operation.
Proper exhaust system alignment is critical for preventing exhaust leaks and ensuring even clearance around suspension components, chassis members, and body panels. The system should be loosely assembled first, then aligned and torqued to specifications once proper positioning is confirmed.
All exhaust hangers should be properly seated in their mounting locations to prevent excessive movement or contact with underbody components. The exhaust tips should be positioned to achieve even spacing within the rear bumper cutouts and proper visual alignment.
Periodic visual inspection of the exhaust system is recommended to identify potential issues before they develop into failures. Inspect exhaust hangers for deterioration, check all connection points for signs of exhaust leaks (indicated by carbon deposits or soot), and verify that the exhaust maintains proper clearance from underbody components.
The stainless steel construction requires minimal maintenance, though periodic cleaning can maintain appearance. The black ceramic-coated tips should be cleaned using mild automotive detailing products designed for painted or coated surfaces. Avoid abrasive cleaners that could damage the ceramic coating.
While stainless steel resists corrosion, regular washing of the underbody during winter months removes road salt and corrosive materials that can accelerate oxidation over time.
Exhaust connection points should be inspected periodically for proper torque and gasket condition. The continuous thermal cycling of exhaust systems can cause fasteners to loosen over time. All clamps and bolts should be checked for proper tightness during routine vehicle maintenance.
The Dinan D660-0090-BLK axle-back exhaust system is covered by Dinan's limited lifetime warranty against defects in materials and workmanship. This warranty coverage applies to the original purchaser for the lifetime of their ownership of the vehicle on which the product was originally installed.
Warranty coverage includes replacement or repair of defective components at Dinan's discretion. The warranty does not cover damage resulting from improper installation, accident, abuse, misuse, or modification of the product.
Normal wear items including gaskets, clamps, and exhaust hangers are subject to standard wear patterns and may require periodic replacement as part of routine maintenance. These items are not covered under the lifetime warranty but are covered against manufacturing defects during the initial warranty period.
An axle-back exhaust system replaces the exhaust components from the rear axle to the exhaust tips. This includes the rear muffler section and exhaust tips. Axle-back systems are typically the most affordable exhaust modification and provide sound enhancement without requiring modifications to catalytic converters or mid-pipes.
Mandrel bending maintains a consistent internal diameter throughout bends in the exhaust tubing, unlike crush bending which reduces the internal diameter at bend points. This consistent diameter ensures optimal exhaust flow, reduces backpressure, and maximizes performance gains while improving exhaust scavenging.
T304 stainless steel is a high-grade austenitic stainless steel alloy containing chromium and nickel. It offers superior corrosion resistance compared to mild steel, excellent durability in harsh environments, and maintains structural integrity at high temperatures. T304 is the preferred material for premium exhaust systems.
Axle-back exhaust systems modify the exhaust note by changing muffler design and internal flow dynamics. The Dinan system provides a deeper, more aggressive tone compared to stock while maintaining reasonable sound levels suitable for daily driving. The sound is most noticeable during acceleration and under load.
Axle-back exhaust systems replace only the rear muffler section and do not affect emissions control components such as catalytic converters or oxygen sensors. This system maintains all factory emissions equipment and should pass standard emissions testing in most jurisdictions.
Installation typically requires basic hand tools including metric wrenches and sockets, penetrating oil for removing factory exhaust bolts, and a jack and jack stands for vehicle support. Installation time is approximately 1-2 hours for experienced technicians. Professional installation is recommended for those unfamiliar with exhaust work.
The black ceramic coating is applied through a high-temperature curing process and is bonded to the stainless steel at a molecular level. This coating is designed to resist fading and discoloration even under sustained high-temperature operation. Proper cleaning and maintenance will preserve the finish appearance over time.
Axle-back exhaust systems typically provide modest horsepower gains of 5-10 HP depending on engine configuration and existing modifications. The primary benefits are improved throttle response, enhanced exhaust sound, and reduced backpressure. More substantial power gains require full exhaust systems including headers or downpipes.
Yes. The axle-back system can be combined with aftermarket mid-pipes, downpipes, or headers for increased performance and sound enhancement. When combining multiple exhaust components, ensure all parts are compatible and properly sized to maintain optimal flow characteristics.
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$595.00 USD
$595.00 USD
This product can expose you to chemicals such as lead and lead compounds, which are known to the State of California to cause cancer or birth defects or other reproductive harm. For more information, visit www.P65Warnings.ca.gov.
For a complete list of chemicals known to cause harm, visit https://www.p65warnings.ca.gov/chemicals.
Under the federal Clean Air Act (42 U.S.C. §7522(a)(3)), it is illegal to manufacture, sell, install, or use any part that defeats or alters a motor vehicle’s emission control system for use on public roads. Unless a product has received an Executive Order (EO) from the California Air Resources Board (CARB), it is not legal for use or installation on any pollution-controlled vehicle driven on public highways.
Some states have CARB-equivalent or independent emissions laws. Customers are responsible for verifying local regulations before purchasing or installing emissions-related products.
All performance, racing, or competition parts sold by this company are intended solely for off-road, closed-course, or competition use on vehicles that are never registered or used on public highways.
Kies Motorsports, LLC sells and markets these products for lawful use only. We do not condone or authorize the use of emission-control defeat devices or any modification that violates the Clean Air Act or state regulations.
