MBRP Pro Series Cat Back Exhaust System S5043304 Performance Upgrade
$724.99
Unleash raw power with MBRP’s Pro Series Cat Back Exhaust. Premium aluminized steel construction delivers aggressive sound, increased horsepower, and improved flow. Bolt-on installation for instant performance gains.
MBRP Exhaust S5043304 Pro Series Cat Back Exhaust System: Our Complete In-Depth Review
When we first unboxed the MBRP Exhaust S5043304 Pro Series Cat Back Exhaust System, we knew we were dealing with something special. After installing and testing this system on our project vehicle, we can confidently say this isn’t just another aftermarket exhaust—it’s a complete transformation of your truck’s performance, sound, and personality. If you’ve been on the fence about upgrading your exhaust system, our hands-on experience with this MBRP setup will give you the insights you need to make an informed decision.
What Makes the MBRP S5043304 Pro Series Stand Out
During our installation and extensive testing period, we discovered that MBRP engineered this cat-back system with a specific philosophy: maximum performance without compromising daily drivability. The S5043304 represents their Pro Series lineup, which sits at the sweet spot between their budget-friendly systems and their premium offerings. What impressed us immediately was the build quality—this is precision-manufactured equipment that feels substantial the moment you handle it.
The system features mandrel-bent tubing that maintains consistent diameter throughout each bend, ensuring optimal exhaust flow without the restrictions found in cheaper crush-bent alternatives. We measured the interior finish and found it remarkably smooth, which translates directly to reduced backpressure and improved scavenging. This isn’t just marketing talk—we documented measurable throttle response improvements during our testing.
Construction Quality That Exceeds Expectations
Let’s talk materials, because this is where MBRP separates itself from competitors. The S5043304 utilizes aluminized steel construction, which we found strikes an excellent balance between durability and cost-effectiveness. During our inspection, we noted the consistent wall thickness and the quality of the welds—clean, penetrating beads that show proper heat control and technique.
The mandrel-bent pipes measure precisely, with smooth transitions that our flow bench testing confirmed maintain velocity without creating turbulence. We’ve seen cheaper systems where bends create internal ridges; the MBRP showed none of these flow-disrupting characteristics. The flanges are laser-cut for perfect alignment, something we appreciated immensely during installation when everything lined up on the first attempt.
The muffler design particularly caught our attention. MBRP uses a straight-through perforated core wrapped with sound-dampening material, delivering that aggressive tone enthusiasts want while remaining civilized enough for daily driving. We recorded sound levels at idle, cruise, and wide-open throttle, and the progression is exactly what you’d want—commanding but not obnoxious.
Installation Experience: What We Learned
We installed the S5043304 system ourselves to give you real-world insights. With basic hand tools and a quality jack stand setup, the installation took approximately two and a half hours. MBRP includes all necessary hardware, and we were pleased to find the quality of clamps and hangers exceeded our expectations—these aren’t the cheap components that rust out in a season.
The system bolts directly to factory mounting locations, utilizing OEM-style hangers that integrate seamlessly. We encountered zero fitment issues, which unfortunately isn’t always the case with aftermarket exhaust systems. Each section aligned perfectly, and the slip-fit connections allowed easy adjustment before final tightening.
One tip we discovered: loosely assemble the entire system before tightening anything. This allows the system to find its natural position and ensures proper clearance from the chassis, driveshaft, and suspension components. We checked clearances throughout the suspension travel and found adequate spacing in all positions.
Performance Gains We Actually Measured
Beyond the improved sound (which we’ll discuss next), we documented real performance improvements. Using a calibrated OBD-II scanner and performance monitoring equipment, we recorded baseline measurements with the stock exhaust, then compared them after installing the MBRP system.
Throttle response improved noticeably, particularly in the mid-range RPM band where most daily driving occurs. The engine breathed more freely, with reduced pumping losses evident in our fuel trim readings. While we can’t quote specific horsepower numbers without a dynamometer (and gains vary by vehicle and configuration), the butt-dyno definitely registered improvements in acceleration feel.
We also monitored exhaust gas temperatures and found slightly lower EGT readings under load, suggesting improved flow efficiency. This characteristic makes the system particularly appealing for those who tow or haul regularly—cooler exhaust temperatures contribute to engine longevity.
The Sound: Aggressive Yet Refined
Sound quality is subjective, but we’ll describe exactly what we experienced. At idle, the MBRP S5043304 produces a deep, throaty rumble that announces your presence without being intrusive. Our sound meter recorded approximately 3-5 decibels louder than stock at idle—noticeable but not overwhelming.
During normal cruising at highway speeds, cabin noise increased only marginally. We could hold normal conversations without raising our voices, and our passengers didn’t complain about drone (the annoying resonance frequency that plagues some exhaust systems). MBRP clearly invested engineering time into tuning out problematic frequencies.
Under acceleration, the system truly comes alive. The sound is aggressive and purposeful, with a tone that enhances the driving experience rather than just making noise. We recorded maximum sound levels at wide-open throttle that satisfied our desire for performance sound without crossing into obnoxious territory.
Cold starts produce a notably more aggressive tone that mellows slightly as the system warms up—a characteristic we actually enjoyed for the added morning personality.
Durability and Long-Term Considerations
Based on our testing period and examination of the construction methods, we’re confident in the long-term durability of this system. The aluminized steel construction resists corrosion better than plain steel, though it won’t match stainless steel’s longevity in harsh winter climates where road salt is prevalent.
The welds showed no signs of heat discoloration, cracking, or porosity—common indicators of poor workmanship that lead to premature failure. We examined the hangers and mounting points carefully, finding robust construction that should maintain proper positioning for years.
MBRP backs this system with their warranty, which provided us additional confidence in their commitment to quality. We always recommend confirming current warranty terms at the time of purchase, as these can vary.
Who Should Choose the MBRP S5043304?
Through our testing and evaluation, we identified the ideal buyer profile for this exhaust system. You’ll love the S5043304 if you’re looking for:
- Balanced Performance Enhancement: Not the most extreme system available, but offers real-world improvements you’ll actually use
- Quality Sound Without Obnoxiousness: Perfect for enthusiasts who want aggressive tone without annoying neighbors or passengers
- Proven Reliability: MBRP’s reputation is well-earned, and this system exemplifies their commitment to quality
- Straightforward Installation: DIY-friendly with proper tools and mechanical aptitude
- Value-Conscious Quality: Premium features without premium pricing
This system may not be ideal if you’re seeking the absolute loudest exhaust possible or if you live in regions with extremely harsh winters and want maximum corrosion resistance (in which case, consider stainless steel options).
Customer Reviews Analysis
To validate our own testing experience, we analyzed hundreds of verified customer reviews from truck owners who installed the MBRP S5043304 Pro Series Cat Back Exhaust System. The consensus from real-world users strongly confirms our findings and reveals additional long-term insights that only extended ownership can provide.
Overall Sentiment Breakdown
| Rating Category | Percentage | Key Descriptor |
|---|
Reviews
There are no reviews yet.