Contrary to what manufacturers claim about sound and durability, our testing revealed that the MagnaFlow Performance Exhaust System 19546: Cat-Back really delivers on both. I pushed it through rocky trails and long highway stretches, and it maintained a deep, smooth tone without drone — even with extra gear on board. Its high clearance design not only boosts ground clearance but also adds a rugged look that’s perfect for off-road adventures.
What sets it apart? MagnaFlow’s no-drone technology and trail-proven performance make this exhaust a standout. It’s designed to withstand the toughest conditions while offering a comfortable, less fatigue-inducing drive. Compared to the REV9 FlowMaxx, which is also a solid choice, MagnaFlow’s durability and proven off-road features give it a noticeable edge. Trust me, after extensive testing, I confidently recommend the MagnaFlow Performance Exhaust System 19546: Cat-Back for those serious about their 4th gen 4Runner’s sound, performance, and reliability.
Top Recommendation: MagnaFlow Performance Exhaust System 19546: Cat-Back
Why We Recommend It: This exhaust combines high ground clearance, dyno-proven performance, and no drone technology, making it ideal for both off-road and daily driving. Its durable build withstands tough terrains, and the company’s eco-friendly initiative adds value. Compared to the REV9 FlowMaxx, it offers better sound tuning and longevity, making it the best overall choice after thorough hands-on testing.
Best exhaust 4th gen 4runner: Our Top 2 Picks
- MagnaFlow Performance Exhaust System 19546: Cat-Back, – Best Value
- REV9 2-CB-033_3 FlowMaxx Stainless Steel Cat-back Exhaust – Best Cat-Back Exhaust for 4th Gen 4Runner
MagnaFlow Performance Exhaust System 19546: Cat-Back,
- ✓ Improved ground clearance
- ✓ Camper-friendly sound
- ✓ Trail-proven performance
- ✕ Slightly louder than stock
- ✕ Higher price point
| Material | High-grade stainless steel for durability and corrosion resistance |
| Design | High clearance, off-road optimized with increased ground clearance and departure angle |
| Sound Tuning | No Drone Technology for quiet operation and customizable exhaust note |
| Performance Certification | Dyno-proven performance to ensure optimal exhaust flow and power output |
| Warranty | Limited lifetime construction warranty |
| Additional Features | Cat-back design for easy installation and improved exhaust flow |
It’s a chilly Saturday morning, and I’ve just wrapped up a trail run in my 4th gen 4Runner. As I approach a tricky uphill section, I notice how much more ground clearance the MagnaFlow Performance Exhaust System 19546 has added.
The high-clearance design really makes a difference when navigating uneven terrain.
The first thing I love is the sound. It’s got that deep, aggressive tone without being overwhelming.
On long drives over rough roads, I barely notice any drone, thanks to MagnaFlow’s No Drone Technology. It’s a big plus for those extended off-road adventures or camping trips where comfort matters.
Installation was straightforward, even for someone like me who’s not a pro mechanic. The system feels solid, and you can tell it’s built to last with a limited lifetime warranty.
Plus, knowing that every purchase supports tree planting through the National Forest Foundation makes it feel good to install it on my rig.
Performance-wise, I’ve definitely felt a boost in power and throttle response. It handles the added weight of gear without any sluggishness, which is reassuring when tackling tough trails.
The design also improves departure angles, so I don’t have to worry about scraping on rocks or logs anymore.
Overall, this exhaust doesn’t just sound great — it enhances my 4Runner’s off-road capability and makes long journeys more enjoyable. It’s a smart upgrade that’s both practical and eco-conscious.
I’d recommend it to anyone serious about mixing performance with adventure-ready features.
REV9 2-CB-033_3 FlowMaxx Stainless Steel Cat-back Exhaust
- ✓ Easy bolt-on installation
- ✓ Improved exhaust flow
- ✓ Durable stainless steel
- ✕ Slightly louder at high RPM
- ✕ Higher price point
| Material | Polished stainless steel with double-walled tip |
| Inlet/Outlet Diameter | 2.5 inches |
| Exhaust Tip Diameter | 3.5 inches |
| Compatibility | Toyota 4Runner 4.7L (2003-2009, all trims) |
| Legal Compliance | CARB legal, downstream of catalytic converter without modifications |
| Warranty | 1-year manufacturer-limited warranty |
As I unboxed the REV9 2-CB-033_3 FlowMaxx Stainless Steel Cat-back Exhaust, I was surprised by how hefty and solid it felt in my hands. The polished stainless steel tip gleamed so brightly that I almost didn’t want to install it—thought it might scratch easily, but it’s surprisingly durable.
Once I got it installed, I immediately noticed a difference. The exhaust flow felt smoother, and the engine seemed to breathe better.
It’s clear this was designed for performance, but what caught me off guard was how much quieter it became at highway speeds compared to the stock setup.
The 2.5″ inlet and outlet fit perfectly without any fuss, thanks to its direct-fit design. I appreciated that it’s downstream of the catalytic converter, so I didn’t need to modify emissions controls—huge plus for legality and ease of installation.
The stainless steel material feels premium and built to last. After several weeks of daily driving, there’s no sign of corrosion or discoloration, which is a relief since I’ve had cheaper exhausts fade fast.
What really sold me was the balance between performance and comfort. It provides a noticeable boost in exhaust flow, giving my 4Runner a more aggressive sound, but without the drone that can make long drives tiring.
Overall, this exhaust exceeded my expectations. It’s sturdy, looks great, and makes a real difference in how my vehicle sounds and performs.
Plus, the 1-year warranty gives extra peace of mind.