Vance & Hines PCX Big Radius: A Performance Legend for 2010-2017 Softails

The Vance & Hines Big Radius has long been considered the “Gold Standard” for custom Softail builds. For the 2010-2017 Harley-Davidson Softail lineup—including the Heritage, Deluxe, Fat Boy, and Slim—Vance & Hines has introduced the PCX (Power Chamber Exhaust) version. This isn’t just a visual refresh; it is a total internal re-engineering. The PCX system utilizes a high-flow chambered catalyst that creates a specific amount of backpressure. For the Twin Cam 96, 103, and 110 engines, this backpressure is vital for low-to-mid range torque, ensuring that your bike doesn’t just look fast at the stoplight, but actually pulls harder when the light turns green.

Precision Engineering and Blue-Proof Protection

One of the biggest concerns for riders is exhaust discoloration. The PCX Big Radius solves this with full-coverage, 220-degree heat shields. These shields are plasma-arc cut from heavy-duty steel and treated with show-quality chrome or a high-temperature matte black ceramic finish. This “blue-proof” design ensures that the intense heat generated by your air-cooled V-Twin never reaches the exterior finish, keeping your pipes looking showroom-fresh for years. The radius-curved design follows the natural lines of the Softail frame, providing a lean, aggressive profile that offers significantly better ground clearance for cornering compared to traditional long-shot or true-dual systems.

Expert Tuning & Installation Insight

As experts in the Twin Cam platform, we know that these engines perform best when the air-fuel ratio is precisely managed. Pro Tip: When moving to the PCX version of the Big Radius, you must update your fuel map. We highly recommend the Vance & Hines Fuelpak FP3, which has specific, dyno-tested maps for the PCX chamber. This will eliminate “popping” on deceleration and ensure your engine stays cool during summer cruises. Installation Note: To maintain the “perfect” look, always use a fresh set of Vance & Hines Flat Exhaust Gaskets. Standard tapered gaskets can sometimes cause fitment issues with the precision-aligned Big Radius headers. Always wipe the pipes with rubbing alcohol before the first start to remove oils and fingerprints.

The Voice of American Iron

The PCX Big Radius delivers a more “sophisticated” aggression than previous generations. It offers a deep, rhythmic “thump” at idle that is unmistakably Harley-Davidson. Under load, it produces a crisp, roaring exhaust note that is authoritative without being “tinny” or excessively raspy. It is the perfect blend of drag-strip heritage and modern engineering. Whether you are building a chrome-heavy Deluxe or a murdered-out Street Bob, the Vance & Hines PCX Big Radius is the ultimate way to define your bike’s character and performance.

Fitment Note: Fits 2010-2017 Softail models (FLS, FLSTN, FLSTF, FLSTC, FXS, FXST). Does not fit 2008-2011 Rocker or 2013-2017 Breakout models due to oil tank and frame variances.

Vance & Hines PCX Big Radius 2-Into-2 Exhaust For Harley Softail

Delivering the best of both worlds, radical custom-bike styling with high quality details like precision-cut full coverage heat shields, Big Radius reset the bar for aftermarket exhaust systems. Now featuring our innovative PCX Technology, which integrates chambered high-flow catalysts for a boost in torque while producing the deep throaty growl you want from your v-twin machine.

Features:

• PCX (Power Chamber Exhaust) Technology
• Chambered High-Flow Catalyst Cartridge Designed to Increase Torque
• Full Coverage Heat Shields
• Available in Chrome or Matte Black

Note: The selected finish/color refers to the full-coverage heat shields. The underlying header pipe finish/color may vary. Once installed, the selected color will be the primary visible finish.