Product Description
Horsepower Inc. Stainless 2-Into-1 Exhaust for Harley Dyna
Transform the performance, sound, and appearance of your Harley-Davidson Dyna with the Horsepower Inc. (HPI) Stainless 2-Into-1 Exhaust. Handcrafted in the USA, this premium performance exhaust combines precision TIG-welded stainless steel construction, an aggressive exhaust note, and a distinctive design built for riders who demand exceptional quality from their motorcycle.
Horsepower Inc. is well known throughout the Harley-Davidson performance community for producing high-quality exhaust systems and engine components. The HPI Dyna Exhaust features a true 2-into-1 configuration designed to promote efficient exhaust flow and support improved horsepower and torque when paired with the appropriate engine combination and calibration.
Each exhaust system is handmade in-house by HPI using stainless steel construction and precision TIG welding. The perforated stainless steel muffler interior delivers the deep, aggressive sound that performance-minded Dyna riders appreciate, while the exposed stainless steel finish provides a clean, race-inspired appearance.
Whether you're upgrading a stock Twin Cam engine or building a high-performance Dyna with aftermarket camshafts, increased displacement, and other engine modifications, the Horsepower Inc. Stainless Exhaust provides a premium foundation for your performance build.
Fitment
- 1999-2005 Harley-Davidson Dyna models without accessory floorboards, using the appropriate early-model exhaust configuration
- 2006-2017 Harley-Davidson Dyna models without accessory floorboards, using the appropriate late-model exhaust configuration
- Compatible with select Dyna Super Glide, Street Bob, Low Rider, Fat Bob, and Wide Glide models, depending on model year and exhaust mounting configuration
Important Fitment Notes:
- Does not fit Harley-Davidson Police Dyna models.
- Not compatible with motorcycles equipped with accessory floorboards.
- Verify clearance when using aftermarket foot controls, forward controls, or other modified components.
- Early and late Dyna applications require different exhaust configurations. Select the correct fitment option for your motorcycle.
- Not designed for Harley-Davidson FXR, Softail, Touring, Sportster, or Milwaukee-Eight models.
Features
- Premium stainless steel 2-into-1 performance exhaust for Harley-Davidson Dyna motorcycles
- 100% handcrafted in the USA by Horsepower Inc.
- Precision TIG-welded construction
- Perforated stainless steel muffler interior
- Designed to promote efficient exhaust flow and support increased horsepower and torque
- Deep, aggressive exhaust tone with distinctive HPI sound characteristics
- Performance-oriented design for stock and modified Twin Cam engines
- Stainless steel finish with visible TIG-welded craftsmanship
- Suitable for performance builds featuring upgraded camshafts, intake systems, and engine modifications
- Includes applicable exhaust mounting hardware, brackets, and clamps supplied by HPI
Specifications
- Manufacturer: Horsepower Inc. (HPI)
- Product Type: Full Performance Exhaust System
- Exhaust Configuration: 2-Into-1
- Material: Stainless Steel
- Finish: Stainless
- Construction: Handmade, TIG-Welded
- Muffler Interior: Perforated Stainless Steel
- Engine Compatibility: Harley-Davidson Dyna / Twin Cam
- Manufacturer Part Number (Early Dyna): HPI-DYEX1-S
- Manufacturer Part Number (2006-2017 Dyna): HPI-DYEX6-S
- Country of Manufacture: USA
Performance & Installation Notes
The HPI Stainless 2-Into-1 Exhaust is engineered for riders seeking strong exhaust performance and an aggressive sound. Its 2-into-1 configuration allows exhaust gases from both cylinders to flow into a single collector and muffler assembly.
Engine Tuning: Appropriate fuel and ignition calibration is recommended after installing a complete performance exhaust. Actual horsepower and torque gains depend on engine displacement, compression ratio, camshaft selection, intake configuration, and tuning.
Installation Hardware: New HPI exhaust systems include the applicable mounting brackets, clamps, and hardware supplied by the manufacturer. Replacement hardware is available separately if needed.
Fitment Verification: Confirm your motorcycle's model year, foot control arrangement, and any aftermarket chassis or engine modifications before ordering.
Stainless Steel Care & Maintenance
Before starting your motorcycle after installation, thoroughly clean the exhaust system to remove fingerprints, oils, and installation residue. Residue left on the stainless steel may cause permanent discoloration when the exhaust reaches operating temperature.
Horsepower Inc. recommends cleaning the exhaust with an appropriate product such as rubbing alcohol, glass cleaner, or soap and water to remove surface contamination. Stainless steel coloration and heat-related discoloration are normal during operation.
Availability & Ordering Information
Horsepower Inc. exhaust systems are handcrafted in the USA, and availability depends on current inventory and manufacturing schedules. These premium exhaust systems may have extended production and fulfillment lead times.
Contact for Availability: Please contact Get Lowered Cycles for current inventory and estimated shipping information before ordering if delivery timing is important.
Emissions Notice
Horsepower Inc. states that its performance exhaust systems are not legal for sale or use in California on pollution-controlled motor vehicles and that the manufacturer does not ship these systems to California. Verify applicable federal, state, and local emissions regulations before purchasing or installing this exhaust system.
| MPN | HPI-DYEX6-S |