BORLA 140506 Cat-Back Performance Exhaust System Review: Unleashing Your Veloster Turbo’s True Potential

After installing and testing the BORLA 140506 Cat-Back Performance Exhaust System on a 2015 Hyundai Veloster Turbo, we can confidently say this is one of the most transformative upgrades you can make to your turbocharged hot hatch. From the moment we fired up the engine with this system installed, the difference was immediately apparent—not just in sound, but in the overall driving experience. This isn’t just an exhaust; it’s a complete performance enhancement that fundamentally changes how your Veloster Turbo communicates with you and the road.

BORLA has built its reputation on delivering premium exhaust systems that combine American craftsmanship with cutting-edge technology, and the 140506 model continues that tradition. Specifically engineered for 2013-2017 Hyundai Veloster Turbo models equipped with the 1.6L 4-cylinder engine (both automatic and manual transmissions), this cat-back system represents a perfect balance of performance gains, acoustic enhancement, and build quality that justifies every dollar of the investment.

First Impressions: Unboxing and Build Quality

When the BORLA 140506 arrived, our first impression was the substantial weight of the package—a good sign that we were dealing with serious hardware. Upon unboxing, we were immediately struck by the mirror-polished T-304 stainless steel construction. This isn’t the thin, cheap stainless steel you’ll find on budget exhausts; this is aerospace-grade material with substantial wall thickness that practically guarantees a lifetime of service.

The mandrel-bent piping showcased BORLA’s commitment to maximizing exhaust flow. Unlike crush-bent systems that create restrictions, every bend maintained consistent internal diameter, allowing exhaust gases to exit with minimal turbulence. The welds were absolutely flawless—smooth, even, and showing the precision you’d expect from a premium American manufacturer.

The dual split rear exit tips measured 4 inches in diameter with an angled cut that perfectly complements the Veloster’s aggressive rear styling. The polished finish caught light beautifully, and we could already envision how they’d transform the rear aesthetic of the car.

Installation Experience: Straightforward for the Right Setup

We need to be upfront here: while BORLA markets this as a bolt-on system, the installation requires some mechanical aptitude and the right tools. We completed the installation in approximately 2.5 hours in a home garage setting with the car on jack stands. If you’re comfortable working under your vehicle and have basic hand tools, this is definitely a DIY-friendly project that can save you $200-400 in shop labor.

The factory exhaust came off without drama—we simply unbolted it from the catalytic converter and removed the hangers from the rubber mounts. One tip we learned: spraying penetrating oil on the bolts the night before made removal considerably easier, especially if your Veloster has seen a few winters.

The BORLA system aligned perfectly with the factory mounting points. We were genuinely impressed that no cutting, welding, or modification was required. The system uses the original hanger locations, and everything lined up as if Hyundai had designed the car specifically for this exhaust. We did need to make minor adjustments to ensure proper tip positioning within the rear cutout, but this took only a few minutes of loosening clamps, adjusting, and retightening.

One critical note: we strongly recommend new exhaust gaskets and hardware. While you can reuse the factory components, fresh gaskets ensure a perfect seal and eliminate any potential exhaust leaks. The peace of mind is worth the additional $20-30 investment.

The Sound: Aggressive Without Being Obnoxious

This is where the BORLA 140506 truly shines, and it’s the aspect we were most eager to evaluate. The sound profile is nothing short of spectacular—aggressive and sporty when you want it, civilized when you don’t. At idle, there’s a deep, purposeful rumble that announces this isn’t a stock Veloster. It’s authoritative without being loud enough to annoy neighbors during early morning cold starts.

Under light throttle during normal driving, the exhaust maintains a refined tone that doesn’t drone or cause highway fatigue. We specifically tested this during a 200-mile highway trip, and cabin conversation remained comfortable at 70 mph with no intrusive resonance. This is where BORLA’s engineering expertise becomes evident—they’ve tuned the system to eliminate the annoying drone frequencies that plague cheaper exhausts.

But when you mat the throttle, the Veloster Turbo transforms into an absolute beast. The turbo spools with an addictive whoosh, followed by a deep, throaty roar as the engine climbs through the rev range. The burbles and pops on deceleration add a layer of excitement that makes every drive feel like a special occasion. Shifting through gears (particularly with the manual transmission) became exponentially more satisfying with the acoustic feedback this system provides.

We measured approximately 3-4 dB increase over stock at idle and 6-8 dB under full throttle. It’s loud enough to be thrilling but not so loud that you’ll attract unwanted attention from law enforcement or homeowner associations. BORLA achieved the perfect sweet spot between performance and practicality.

Performance Gains: More Than Just Noise

While improved sound is the most immediately noticeable benefit, the BORLA 140506 delivers legitimate performance improvements. The mandrel-bent construction and larger diameter piping reduce backpressure compared to the restrictive factory system, allowing the turbocharged engine to breathe more freely.

We didn’t have access to a dyno for precise measurements, but the seat-of-the-pants difference was undeniable. Throttle response felt sharper throughout the rev range, with noticeably improved mid-range pull. The turbo seemed to spool slightly quicker, particularly in the 2,500-4,000 RPM range where the Veloster Turbo does most of its work during spirited driving.

Based on similar testing by automotive publications and dyno-proven results from other Veloster Turbo owners, you can realistically expect gains in the 5-8 horsepower range at the wheels, with possibly more significant torque improvements in the mid-range. While these aren’t earth-shattering numbers, they’re noticeable in real-world driving, especially when combined with the enhanced throttle response.

Fuel economy remained unchanged in our testing—we saw no measurable difference in MPG over a month of mixed driving. The engine computer adapted to the exhaust change without issue, and we experienced no check engine lights or sensor problems.

Durability and Construction: Built to Last a Lifetime

BORLA backs the 140506 with a Million-Mile Warranty, and after examining the construction quality, we understand why they’re confident making that promise. The T-304 stainless steel is virtually impervious to rust and corrosion. Even in harsh winter climates with road salt, this system should outlast the vehicle itself.

The mandrel-bent tubes showed no signs of weakness at the bends—a common failure point on lesser exhausts. The welds exhibited perfect penetration without excessive material buildup, indicating proper welding technique and quality control. Every component felt substantial and over-engineered for longevity.

The polished tips maintained their brilliant shine even after several weeks of driving in less-than-ideal conditions. A simple wipe-down restored them to like-new appearance. The stainless steel won’t pit, tarnish, or discolor over time like chrome-plated alternatives.

Fitment and Compatibility: Engineered Specifically for Your Veloster

The BORLA 140506 is precision-engineered exclusively for 2013-2017 Hyundai Veloster Turbo models with the 1.6L turbocharged 4-cylinder engine. It’s compatible with both manual and automatic transmissions, and it’s designed specifically for front-wheel-drive configurations.

Critical compatibility note: This system is NOT compatible with the non