17-20 Raptor / Limited F-150 SPD Performance HXFRM17RPA GEN2 304SS 3" HX Series Helmholtz Resonated Pre-Axle Dump

SPD Performance HX Series Helmholtz Resonated Pre-Axle Dump – 304 Stainless Steel 3" Exhaust Upgrade

Part Number: HXFRM17RPA

The SPD Performance HX Series Helmholtz Resonated Pre-Axle Dump is engineered to deliver aggressive performance sound while maintaining refined cabin comfort for the 2017–2020 Ford F-150 Raptor and High Output Limited models. Designed specifically for trucks equipped with specialized rear suspension systems that cannot route dual exhaust over the axle, this system provides a high-performance solution without sacrificing flow, tone, or durability.

Built around a straight-through HX Series muffler design, this exhaust upgrade eliminates restrictive chambers and reductions to maximize exhaust flow and engine efficiency. A built-in Helmholtz resonator targets and neutralizes drone frequencies that commonly occur at cruising speeds, allowing drivers to enjoy the distinctive exotic exhaust tone produced by equal-length systems without unwanted cabin noise. An integrated X-pipe further blends exhaust pulses to create a smoother, more refined sound profile. Constructed from durable 304 stainless steel with hard-pack sound dampening material that resists breakdown from vibration, this system is designed for long-term performance and reliability. When paired with the SPD Equal Length Trombone mid-pipe, this setup creates one of the most unique and aggressive exhaust tones available for the Gen2 Raptor platform. Additionally, the pre-axle dump configuration reduces system weight by over 30 pounds compared to traditional rear-exit exhaust setups, improving overall efficiency and performance.

Key Features

• 3-inch HX Series straight-through performance muffler design

• Integrated Helmholtz resonator to reduce in-cab drone frequencies

• Built-in X-pipe for improved exhaust tone blending

• Constructed from high-quality 304 stainless steel for corrosion resistance

• Hard pack sound dampening material that will not degrade like glass or metal wool

• Pre-axle dump configuration designed for trucks with limited rear exhaust routing space

• Optimized for use with SPD Equal Length Trombone mid-pipe systems

• Ideal for vehicles running aftermarket downpipes

• Significant weight reduction compared to factory or rear-exit exhaust systems

Benefits

• Produces a deep, exotic performance exhaust note without excessive cabin noise

• Improves exhaust flow for better engine breathing and performance potential

• Helmholtz technology minimizes annoying highway drone while maintaining aggressive sound

• Durable stainless steel construction provides long-term reliability in harsh conditions

• Hard-pack internal materials maintain consistent sound characteristics over time

• Reduces rear vehicle weight by more than 30 pounds for improved efficiency and handling

• Direct-fit design simplifies installation and integrates seamlessly with compatible exhaust components

• Backed by a limited lifetime warranty from SPD Performance for peace of mind

Product Specifications

• Pipe Diameter: 3 inches

• Material: 304 Stainless Steel

• Finish: Natural stainless steel

• Muffler Design: Straight-through HX Series

• Resonator Type: Helmholtz drone-cancellation chamber

• Tone Management: Integrated X-pipe exhaust blending

• Sound Dampening: Hard pack internal material

• Exhaust Configuration: Pre-Axle Dump

• Approximate Product Weight: 20 lbs

• Weight Savings: Over 30 lbs compared to rear-exit systems

• Performance Compatibility: Recommended for use with aftermarket downpipes

Install Difficulty Level
Installation is straightforward and can typically be completed in about 2 hours using basic hand tools. The system is designed as a direct bolt-on upgrade for compatible vehicles, making it an easy installation for experienced DIY enthusiasts or professional technicians. The simplified pre-axle configuration also eliminates the complexity of routing exhaust piping over the rear axle, further speeding up installation.

Vehicle Fitment

• 2017–2020 Ford F-150 Raptor – 3.5L EcoBoost (Gen 2)

• 2019–2020 Ford F-150 Limited – 3.5L EcoBoost High Output

For questions about this product or to report any inaccuracies in this product description, contact the MPT Performance experts at (407) 636-7077 or by email for assistance.