Trask Performance 2-into-1 Exhaust Systems for Harley-Davidson M8 Touring
Trask Performance 2-into-1 Exhaust Systems for Harley-Davidson
Hand-built in Phoenix, Arizona. Maximum airflow. Commanding sound. Uncompromising performance. Choose the Trask exhaust that matches your riding style and power goals.
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Trask Nasty Bastard vs. Big Sexy: Which Exhaust is Right for You?
| Feature | Nasty Bastard | Big Sexy |
|---|---|---|
| Best For | All-around performance and sound | High-output builds (140+ HP) |
| Recommended Engine | All M8 engines | 117″ M8 and higher output builds |
| Header Design | 1-3/4″ tapered headers | Three-step header design |
| Muffler Style | Turnout megaphone (3″ to 3-1/2″) | High-flow merge megaphone |
| End Cap Style | Turn-out billet | Conical |
| Profile Style | Short | Angled |
| Heat Shields | Standard | Custom Assault-style |
| Joint Type | Standard | Double-slip (heat expansion) |
| Finish Options | Black, Chrome | Black, Brushed Stainless, Polished Stainless |
| Fitment | 2017–2025 M8 Touring | 2017–2024 M8 Touring |
| Price Range | From $1,259.96 | From $1,259.96 – $1,599.95 |
| Made in USA | Yes – Phoenix, AZ | Yes – Phoenix, AZ |
Frequently Asked Questions About Trask Exhaust Systems
Will a Trask 2-into-1 exhaust fit my Harley-Davidson Street Glide?
Yes. Both the Trask Nasty Bastard and Big Sexy 2-into-1 exhaust systems are designed to fit 2017–2025 Harley-Davidson Street Glide models, including the Street Glide Special and Street Glide ST. They are engineered for Milwaukee-Eight (M8) powered touring motorcycles and bolt on with no frame modifications required.
What is the difference between the Trask Nasty Bastard and the Trask Big Sexy exhaust?
The Nasty Bastard is an excellent all-around performance exhaust suitable for any M8 engine, featuring 1-3/4″ tapered headers flowing into a turnout megaphone. The Big Sexy is specifically designed for higher-output builds making 140+ horsepower, featuring a three-step header design, double-slip joints for heat expansion, and a high-flow merge muffler. If you have a stock or mildly modified engine, the Nasty Bastard is ideal. If you’re running a 117″ or built motor, the Big Sexy is the way to go.
Do I need a tune after installing a Trask exhaust on my Harley?
Yes, a fuel management tune is strongly recommended after installing any full 2-into-1 exhaust system. The increased airflow from the exhaust changes the air/fuel ratio, and without a proper tune, your engine may run lean, which can cause poor performance, excessive heat, and potential engine damage. A quality fuel management device like a Power Vision or ThunderMax tuner paired with your new Trask exhaust will maximize your horsepower and torque gains.
Can I use my stock air cleaner with a Trask Nasty Bastard exhaust?
No. The Trask Nasty Bastard exhaust will not fit with the OEM air cleaner. You will need an aftermarket high-flow air cleaner. Trask Performance makes their own line of Assault air cleaners that pair perfectly with their exhaust systems, but other quality aftermarket air cleaners will work as well.
How loud is the Trask Nasty Bastard 2-into-1 exhaust?
The Trask Nasty Bastard produces a deep, aggressive exhaust note that is noticeably louder than stock but not obnoxious. It includes a removable performance baffle that gives you some control over the sound level. With the baffle in, you get a strong, authoritative rumble. With the baffle removed, you get a more aggressive, open exhaust sound. Most riders find the baffled sound to be the perfect balance of performance and livability for daily touring.
Is the Trask Big Sexy exhaust worth the extra money over the Nasty Bastard?
If you’re building a high-performance touring bike with a 117″ or larger displacement engine, the Big Sexy is absolutely worth the investment. Its three-step header design and high-flow merge muffler are specifically engineered to support 140+ horsepower, and the double-slip joints handle the extreme heat expansion of high-output engines. For stock or mildly modified engines, the Nasty Bastard provides excellent performance gains at a lower price point.
Are Trask exhaust systems made in the USA?
Yes. All Trask Performance exhaust systems are hand-built in their facility in Phoenix, Arizona. Trask uses high-quality mandrel-bent stainless steel in their construction and each system undergoes quality inspection before shipping. The company has been a leader in Harley-Davidson performance parts for years and is well-known in the V-twin community for their quality and innovation.
What finish options are available for Trask M8 Touring exhaust systems?
The Trask Nasty Bastard is available in Black or Chrome. The Trask Big Sexy offers three finish options: Black ceramic coating, Brushed Stainless Steel (natural look), and Polished Stainless Steel (mirror finish). The Polished Stainless option carries a premium price due to the additional finishing work required. All finishes are designed for durability and heat resistance.
Will a Trask 2-into-1 exhaust fit a Road Glide with the fairing?
Yes. Both the Nasty Bastard and Big Sexy are designed to fit all M8 Touring models, including the Road Glide, Road Glide Special, Road Glide ST, CVO Road Glide, and Road Glide Limited. The exhaust routing is designed to clear the fairing, frame, and all touring components without interference.
Do Trask exhaust systems include O2 sensor bungs?
Yes, Trask exhaust systems include 18mm oxygen sensor bungs. However, if your motorcycle uses 12mm sensors, the 18mm to 12mm sensor bung adapters are not included and must be purchased separately. If your bike does not use O2 sensors, you will also need to purchase O2 sensor port plugs separately for non-sensor applications.
Can I install a Trask 2-into-1 exhaust myself, or do I need a professional?
A Trask exhaust can be installed by a mechanically competent home mechanic with basic hand tools. The installation typically takes 1-3 hours depending on experience. You will need to remove the stock exhaust, heat shields, and mounting hardware, then install the new system. The most important post-installation step is getting a proper fuel management tune, which is best done by a dyno tuner or Trask-certified dealer for optimal results.
Are Trask exhausts legal in California?
Trask Performance exhaust systems are not legal for sale or use in California on pollution-controlled motor vehicles. They are designed for off-road or competition use in states with emissions restrictions. In most other states, aftermarket exhaust systems are legal for street use. Always check your local and state regulations regarding exhaust modifications before purchasing.
