Next Level Performance
August 7, 2026 • 10 min read
Our Verdict
The Injen 3.8L V6 SS cat-back is the best all-around exhaust for the 2010–2016 Genesis Coupe 3.8, and the Injen 2.0T system is the pick for turbo cars.
Across six cat-back systems from Injen, Borla, MagnaFlow and MXP, the Injen 304 stainless V6 kit ($2,151.77) delivers the deepest naturally-aspirated tone with quad titanium tips and the best fit. Want the loudest race note? Choose Borla. Want a resonant, drone-free daily setup? MagnaFlow’s Street Series is the one.
Shop Our Top Pick →Upgrading your Genesis Coupe exhaust is the single most satisfying bolt-on you can make to Hyundai’s 2010–2016 rear-drive sport coupe — it wakes up the Lambda V6 and Theta II turbo-four, drops weight over the heavy factory system, and finally lets the engine breathe past the muffled OEM cans. At NLP Performance in Tampa, FL, we ship cat-back systems for both the 2.0T and 3.8 V6 every week, and the six kits below are the ones our customers keep coming back for. This guide compares real specs, materials, tip styles, sound character and pricing so you can match the right cat-back to your car the first time.
Why Upgrade Your Genesis Coupe Exhaust?
A cat-back exhaust replaces everything from the catalytic converter back — mid-pipe, mufflers and tips — with wider-diameter, mandrel-bent stainless tubing that reduces backpressure. On a naturally aspirated Genesis Coupe 3.8 V6, expect roughly 2–8 wheel horsepower depending on the rest of your setup; the bigger, more repeatable win is tone, throttle response and a system that will not rust out like the factory mild-steel unit. On the 2.0T, freeing up the exhaust after the turbo helps spool and pairs well with a tune and intake.
The factory Genesis Coupe exhaust is deliberately quiet and heavy. Every kit in this roundup is built from 304 or T-304 stainless steel, so corrosion resistance and longevity jump immediately. Straight-through muffler designs (MagnaFlow, Injen, MXP) flow more and sound louder; chambered and resonated designs tame drone for daily driving. Below we break down which system fits which engine, then review all six head to head.
Genesis Coupe Engine Specs
2.0T vs 3.8 V6: Match the Exhaust to Your Engine
The correct Genesis Coupe cat-back depends entirely on which engine you have. The 3.8L V6 (Lambda) made 306 hp and 266 lb-ft from 2010–2012 and jumped to 348 hp and 295 lb-ft with the 2013 GDI update; it uses a true dual-exit system, so V6 cat-backs are two-pipe designs that reward a deeper, multi-cylinder tone. The 2.0L turbo (Theta II) made 210 hp and 223 lb-ft through 2012, then 274 hp and 275 lb-ft as a direct-injected unit for 2013–2014; turbo cat-backs run a single larger pipe (often with a Y-pipe and resonator) for a punchy four-cylinder note.
The practical rule: buy a V6-specific kit for a 3.8, and a 2.0T-specific kit for a turbo car. They are not interchangeable because the rear-axle routing and outlet configuration differ. Trim (base, Premium, R-Spec, Grand Touring, Track, Ultimate) does not change exhaust fitment — engine and year do.
| Kit | Engine Fit | Material / Tips | Warranty | Price |
|---|---|---|---|---|
| Injen 3.8 V6 SS Cat-BackTop Pick | 3.8 V6 (2010–2016) | 304 SS / quad titanium | Limited lifetime | $2,151.77 |
| Injen 2.0T SS Exhaust | 2.0T (2010–2013) | 304 SS / 76mm Y-pipe | Limited lifetime | $2,050.30 |
| Borla 3.8 V6 S-Type Cat-Back | 3.8 V6 (2010–2013) | T-304 SS / dual round | 1 Million Mile | $1,758.99 |
| MagnaFlow 3.8 Street Series | 3.8 V6 (2010–2016) | SS / quad 4-inch split | Lifetime | $1,691.00 |
| Borla 2.0T Cat-Back | 2.0T (2010–2014) | T-304 SS / dual round | 1 Million Mile | $1,514.99 |
| MXP 2.0T SP T304 System | 2.0T (2009–2012) | T304 SS / single tip | Limited | $1,080.61 |
The 6 Best Genesis Coupe Cat-Back Exhaust Systems
Here are the six systems ranked and reviewed, split by engine. Prices reflect current NLP Performance listings. Every kit is a direct bolt-on cat-back — no cutting, no welding.
1. Injen 3.8 V6 SS Cat-Back — Best Overall for the V6
Injen’s 304 stainless V6 cat-back is our top pick for the 3.8 because it nails the two things Genesis Coupe owners want most: a deep, refined naturally-aspirated tone and jewelry-grade quad titanium tips that transform the rear valance. Mandrel-bent tubing keeps flow smooth, and the fit is genuinely bolt-on. It carries an Injen limited lifetime warranty. The one caveat is compliance — this system is not CARB legal and cannot ship to California addresses, so out-of-state 3.8 owners get the most out of it.
What We Like
- + Deepest, most refined V6 tone in the group
- + Quad titanium tips look factory-plus
- + 304 stainless with limited lifetime warranty
Things to Consider
- – Not CARB legal — will not ship to California
- – Highest price in the roundup
Injen’s quad titanium tips on the 3.8 V6 system.
2. Injen 2.0T SS Exhaust — Best for Turbo Cars
For 2.0T cars, the Injen system is the one to beat. A large 76mm Y-pipe, an integrated resonator and investment-cast, molded stainless flanges make it flow hard while keeping in-cabin drone in check — important on a turbo four that can get boomy. Combined with a tune and intake, it sharpens spool and gives the 2.0T a purposeful, deeper voice without sounding like a coffee can. It is fully bolt-on for 2010–2013 turbo coupes.
What We Like
- + 76mm Y-pipe and resonator balance flow and drone
- + Molded stainless flanges seal cleanly
- + Pairs perfectly with a 2.0T intake and tune
Things to Consider
- – Best gains require a supporting tune
- – Turbo-only — will not fit the 3.8 V6
The Injen 2.0T system’s 76mm Y-pipe and resonator.
3. Borla 3.8 V6 S-Type Cat-Back — Loudest Race Note
Borla built its reputation on sound, and the S-Type note on the 3.8 V6 is the most aggressive in this roundup — a hard, motorsport-flavored bark that shows up under throttle but settles at cruise. It is fabricated from premium T-304 stainless (more corrosion-resistant than the 409 many budget kits use) and is backed by Borla’s legendary 1 Million Mile warranty. If you want your Genesis Coupe heard before it is seen, this is the pick.
What We Like
- + Loudest, most aggressive V6 tone
- + Premium T-304 stainless construction
- + Industry-best 1 Million Mile warranty
Things to Consider
- – Can be loud for a daily commute
- – Covers 2010–2013 fitment
Borla’s T-304 dual-outlet S-Type system for the V6.
4. MagnaFlow 3.8 Street Series — Best Daily Driver
MagnaFlow’s Street Series 16507 is the drone-free daily-driver choice for the 3.8. It uses 2.5-inch mandrel-bent main piping and two straight-through mufflers for a signature resonant, dyno-proven tone that is powerful without being obnoxious on the highway. The quad split rear exit with 4-inch polished, double-wall angle-cut tips is a genuine styling upgrade. It fits the full 2010–2016 3.8 range and is covered by MagnaFlow’s lifetime warranty.
What We Like
- + Resonant tone with minimal highway drone
- + Covers all 2010–2016 3.8 model years
- + Lifetime warranty and 4-inch polished tips
Things to Consider
- – Not the loudest option if you want race volume
- – V6-specific — not for the 2.0T
MagnaFlow’s quad split 4-inch polished tips on the 3.8.
5. Borla 2.0T Cat-Back — Best Turbo Value
If you want the Borla name and warranty on a turbo car at a friendlier price, the 2.0T T-304 cat-back is the value play. It brings Borla’s trademark tone to the four-cylinder, fits both automatic and manual RWD 2.0T coupes from 2010–2014, and carries the same 1 Million Mile warranty as the V6 system. At $1,514.99 it undercuts the Injen turbo kit while still delivering premium T-304 stainless construction.
What We Like
- + Premium Borla T-304 stainless at a lower price
- + 1 Million Mile warranty
- + Fits AT and MT 2.0T coupes 2010–2014
Things to Consider
- – Less drone control than the resonated Injen
- – Turbo cars want a tune to maximize it
6. MXP 2.0T SP System — Best Budget Turbo Kit
The MXP SP-series system is the entry point for 2.0T owners who want real T304 stainless at the lowest price in this guide. At $1,062.60 it is several hundred dollars cheaper than the premium turbo kits, giving early 2009–2012 turbo coupes a louder, freer-flowing note without the premium-brand markup. It is the pick when budget is the priority and you still want stainless durability.
What We Like
- + Lowest price of any kit here
- + Real T304 stainless construction
- + Straightforward bolt-on for early 2.0T cars
Things to Consider
- – Only two catalog photos to preview
- – Covers the 2009–2012 turbo range
How to Choose the Right Genesis Coupe Cat-Back
Start with your engine and year: a 3.8 V6 needs a V6 dual-exit kit, and a 2.0T needs a turbo-specific single-pipe kit. Then weigh three things:
- Sound level: Borla S-Type is the loudest; MagnaFlow Street Series and the resonated Injen 2.0T are the most drone-free for daily driving.
- Material: Every kit here is 304 / T-304 stainless, so all will outlast the factory mild-steel exhaust. T-304 (Borla) resists corrosion best.
- Compliance: Most cat-backs sit behind the catalytic converter and are 50-state legal, but the Injen 3.8 V6 system is explicitly not CARB legal and will not ship to California — confirm your state before buying.
Installation is a driveway-friendly bolt-on for all six — plan on about one to two hours with basic hand tools, penetrating oil for the factory hardware and a second set of hands to hang the mufflers. No tune is required for a cat-back alone, though 2.0T owners see the best results pairing it with an intake and ECU flash.
Frequently Asked Questions
Does a cat-back exhaust add horsepower to the Genesis Coupe?
A cat-back exhaust typically adds about 2–8 wheel horsepower to the Genesis Coupe, with the 3.8 V6 and tuned 2.0T seeing the most. The bigger benefits are a deeper tone, reduced weight versus the factory system and better throttle response. For larger power gains, pair the cat-back with an intake, tune and (on the V6) headers.
What is the best exhaust for the Genesis Coupe 3.8 V6?
The Injen 3.8L V6 SS cat-back ($2,151.77) is the best all-around exhaust for the Genesis Coupe 3.8, offering a deep naturally-aspirated tone and quad titanium tips. If you want the loudest race note, the Borla S-Type ($1,758.99) is the pick; for the most drone-free daily setup, choose the MagnaFlow Street Series ($1,691.00).
What is the best exhaust for the Genesis Coupe 2.0T?
The Injen 2.0T SS exhaust ($2,050.30) is the best cat-back for the Genesis Coupe 2.0 turbo thanks to its 76mm Y-pipe and integrated resonator, which balance flow with low drone. The Borla 2.0T ($1,514.99) is the value alternative, and the MXP SP system ($1,062.60) is the budget choice.
Will a Genesis Coupe cat-back exhaust be too loud or drone?
Drone depends on muffler design. Straight-through and S-Type systems like the Borla are the loudest and can drone on the highway, while resonated designs like the Injen 2.0T and the MagnaFlow Street Series are engineered to minimize in-cabin drone for daily driving. Choose a resonated or chambered kit if your car is a commuter.
Is a Genesis Coupe cat-back exhaust CARB legal in California?
Most cat-back exhausts install behind the catalytic converter and are 50-state legal because they do not alter emissions equipment. However, the Injen 3.8 V6 system in this guide is explicitly not CARB legal and will not ship to California addresses, so California owners should confirm compliance before ordering.
Does a cat-back exhaust fit both the 2.0T and 3.8 V6 Genesis Coupe?
No. Genesis Coupe cat-back exhausts are engine-specific: the 3.8 V6 uses a dual-exit system and the 2.0 turbo uses a single-pipe system, so they are not interchangeable. Always buy the kit listed for your exact engine and model year; trim level does not affect fitment.
How long does it take to install a Genesis Coupe cat-back exhaust?
A Genesis Coupe cat-back exhaust installs in about one to two hours as a bolt-on job with basic hand tools. No cutting or welding is required, and a cat-back alone does not need a tune, though 2.0T owners get the best results combining it with an intake and ECU flash.
Ready to Wake Up Your Genesis Coupe?
Shop cat-back exhaust systems for the 2.0T and 3.8 V6, plus thousands more performance parts at NLP Performance.
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