MBRP Performance Exhaust 4" Filter Back, Single Side Exit, AL
MBRP’s S6130AL 4" Filter-Back Single Side Exit Exhaust is a value-packed, aluminized steel system designed to improve sound, reduce backpressure, and enhance the driving experience of your 6.7L Cummins-powered Ram 2500/3500, all while retaining the factory emissions equipment.
The MBRP S6130AL is a 4" filter-back (DPF-back) exhaust system that routes to a single side exit behind the passenger-side rear tire, giving your truck a classic, clean look and a deeper exhaust note without excessive drone. Built from heavy-gauge aluminized steel, this system belongs to MBRP’s Armor Lite / Installer Series line, which blends durability with affordability for trucks operating in moderate environments. Because it is DPF-back, it leaves your diesel particulate filter and other emissions components in place, making it a popular upgrade for drivers who want better sound and flow while remaining emissions compliant in most regions where DPF-back modifications are allowed.
This kit is engineered specifically for late-2000s to early-2010s Ram heavy-duty trucks equipped with the 6.7L Cummins diesel.
Compatible platforms:
2007–2010 Dodge Ram 2500 6.7L Cummins (L6 diesel).
2007–2010 Dodge Ram 3500 6.7L Cummins (L6 diesel).
2011–2012 Ram 2500 6.7L Cummins (L6 diesel).
2011–2012 Ram 3500 6.7L Cummins (L6 diesel).
System type and design:
4" filter-back / DPF-back exhaust (mounts after the factory diesel particulate filter).
Single side exit, behind passenger-side rear tire for traditional truck styling and easy trailer clearance.
Mandrel-bent tubing for smoother flow and reduced restriction compared to crimped factory bends.
Large-diameter tailpipe with tip (product listings note a 5" outside-diameter tip on many S6130AL packages, offering an upgraded visual finish).
Construction:
Heavy-duty aluminized steel tubing, designed for cost-effective performance in moderate climates.
Installer / Armor Lite Series, featuring MBRP’s performance-focused design and sound tuning at a budget-friendly price point.
Bolt-on system engineered to utilize factory hangers and mounting points where possible, minimizing modifications.
DPF-back configuration retains factory DPF, SCR, and other upstream emissions components, so there are no changes to emissions controls or factory ECU calibrations required in typical applications.
Does not require tuning when installed on otherwise stock trucks, as it does not alter sensor placement or DPF operation.
The S6130AL exhaust is built to deliver noticeable improvements in sound, drivability, and aesthetics, especially for towing and daily-use trucks.
Improved exhaust flow:
Mandrel-bent 4" tubing reduces backpressure compared to many factory systems with smaller diameter and crush bends.
Freer-flowing filter-back exhaust can help your turbocharger spool more efficiently and evacuate exhaust gases more effectively, which may support lower exhaust gas temperatures, especially under heavy load.
Power and torque potential:
MBRP’s performance exhaust philosophy centers on optimizing flow to unlock additional horsepower and torque when combined with the overall engine package.
Installer Series 4" systems of this type have been associated with gains of up to roughly 18 horsepower and 28 ft-lb of torque on comparable Cummins platforms when combined with supporting mods and proper conditions, though actual gains will vary by truck and setup.
Lower EGTs under load:
Reduced backpressure downstream of the DPF can contribute to lower exhaust gas temperatures during towing, hill climbs, and heavy throttle situations, giving hardworking trucks a performance edge.
Cooler EGTs help protect engine components and are valued by owners who tow heavy or spend extended time under load.
Enhanced sound without excessive drone:
Tuned to deliver a deeper, richer exhaust tone that brings out more of the Cummins character while remaining compatible with the DPF and daily-driving needs.
Many owners report a more pronounced turbo whistle and exhaust note compared with stock, but without the harsh, raspy tone often associated with more radical systems.
Aesthetics and presence:
High-flow 4" tailpipe and oversized tip (where included) give the truck a more aggressive and finished appearance, especially when viewed from the rear or passenger side.
Clean single side exit clears most common trailer and towing setups while maintaining a factory-plus visual style.
Practical ownership benefits:
Bolt-on design and direct-fit engineering reduce install time and the need for specialized tools, making it an approachable DIY project for many owners.
Retains the majority of the OE routing and clearance considerations, helping avoid interference with suspension components, spare tire, or hitch hardware on properly configured trucks.
This system is designed to balance cost, durability, and performance for trucks operating in typical North American climates that are not heavily salted year-round.
Aluminized steel design:
Built from heavy-gauge aluminized steel tubing, which uses an aluminum-silicon alloy coating to guard against rust and corrosion better than bare carbon steel.
Designed to withstand the thermal cycling and vibration of diesel truck service, while keeping the price more reachable than equivalent stainless systems.
Armor Lite / Installer Series positioning:
MBRP positions its aluminized systems as ideal for trucks in moderate climates or for owners seeking a budget-conscious performance upgrade.
For drivers in extreme winter or coastal environments, MBRP recommends stepping up to its Armor Plus or Armor Pro stainless steel lines for maximum corrosion resistance, but the S6130AL offers strong value for less aggressive conditions.
Long-term considerations:
Surface rust and discoloration can naturally occur on aluminized steel over time, especially in areas exposed to moisture and road treatments, but this typically does not immediately impact structural integrity.
Routine rinsing, especially during and after winter, will help extend the life of the system in climates where salt or brine is used on roadways.
MBRP backs the S6130AL with a limited warranty corresponding to its material grade, giving buyers added confidence in the system’s longevity and workmanship.
Warranty term and coverage:
MBRP lists aluminized “Armor Lite / Installer Series” systems with a multi-year limited warranty (commonly noted as 3-year coverage by resellers), reflecting its policy for aluminized exhausts.
The warranty covers defects in materials and workmanship under normal use and service, including failures arising from manufacturing issues within the warranty period.
What is not covered:
Surface rust, penetrating rust in harsh conditions, and discoloration from heat exposure are typically excluded from aluminized steel warranty coverage, as these are considered normal environmental effects.
Damage from improper installation, misuse, racing, or modifications that alter how the system is supported or routed are also outside the standard warranty.
Support and service:
MBRP emphasizes easy DIY installation and “no-BS” customer service, encouraging owners to contact them directly for warranty evaluation or fitment questions.
Warranty claims usually require proof of purchase, photos, and inspection to confirm that the issue stems from materials or workmanship rather than external damage.
(For exact terms, customers should refer to the current MBRP warranty documentation and norcaldieselperformance.com policies at the time of purchase.)
Because this is a DPF-back system that installs behind most emissions sensors, it is not typically associated with introducing new diagnostic trouble codes when properly installed on a stock-tuned truck. However, exhaust leaks, improper fitment, or pre-existing issues can trigger symptoms or codes that owners should understand.
Exhaust leaks:
Hissing, ticking, or “chuffing” sounds around clamps or joints after installation can indicate a leak that may need clamp re-tightening or repositioning of pipes.
Visible soot marks around a junction or clamp are a sign that exhaust is escaping before the tailpipe tip and should be corrected to prevent fumes entering the cabin or underbody corrosion.
Vibration or contact:
Rattling or banging noises over bumps can indicate that a hanger is misaligned or a section of pipe is contacting the frame, axle, or hitch, requiring adjustment of hangers or rotation of pipes in the slip joints.
Abnormal vibration through the floorboard at certain RPMs can also stem from insufficient clearance or a stressed hanger position.
Accelerated corrosion:
In heavily salted environments, aluminized systems may show surface rust earlier than stainless systems, especially at welds and exposed edges.
Perforation or flaking metal in severe conditions is a sign the system is reaching the end of its service life and may need partial or full replacement.
While the S6130AL itself does not include sensors or modify DPF or catalytic positions, some related codes may appear if the upstream system is already stressed or if installation affects DPF-backpressure behavior:
DPF efficiency / backpressure codes:
Codes such as P2002 (Diesel Particulate Filter Efficiency Below Threshold) or similar manufacturer-specific DPF codes can occur if the DPF is overloaded or malfunctioning, but a properly installed filter-back exhaust is not usually the root cause.
Restrictions or damage in the DPF or upstream piping will continue to trigger such codes regardless of the filter-back system and should be addressed separately.
Exhaust temperature / sensor codes:
If upstream exhaust gas temperature (EGT) or pressure sensors are disturbed, damaged, or unplugged during installation of any exhaust component in front of the DPF, codes relating to those sensors can appear.
Since the S6130AL is designed as a DPF-back system, installers should ensure they are not altering or stressing wiring to sensors ahead of the mounting point.
In most standard installations on otherwise stock trucks, the S6130AL does not require tuning and does not inherently cause new check engine lights; any codes that appear should be diagnosed by checking upstream emissions components and sensor connections first.
This exhaust is designed to be approachable for DIY truck owners using common hand tools, though professional installation remains a strong option for those who want a quick, hassle-free upgrade.
Fitment and hardware:
Uses slip-fit connections, band clamps, and hangers engineered to interface with factory mounting locations.
Sections are modular to ease handling during installation and to allow minor adjustments for ideal tip position and clearance.
Typical installation steps (high-level):
Safely support the vehicle as needed and remove the OE filter-back section by unbolting clamps and hangers, retaining hardware when specified.
Assemble the new MBRP sections from front to rear, loosely fitting clamps and hangers to allow adjustment.
Verify clearances to axle, frame, spare tire, brake lines, and hitch, then progressively tighten clamps to manufacturers’ recommended torque.
Tips for best results:
Test-fit the entire system before final tightening to ensure proper tailpipe alignment and to avoid stress on any single joint.
Re-check clamp torque after a short shakedown drive, as new systems can settle slightly with heat cycles.
This S6130AL system is designed for select Ram/Dodge 2500 and 3500 trucks equipped with the 6.7L Cummins diesel, covering many 2007–2012 model-year configurations. Customers should confirm exact year, trim, bed length, and drivetrain details against the fitment listed on norcaldieselperformance.com before ordering.
No tuning is typically required for a filter-back / DPF-back exhaust on an otherwise stock truck, because the system installs behind the emissions-critical components and sensors. The factory engine management is generally able to accommodate the minor change in post-DPF backpressure without recalibration.
Yes, the S6130AL generally produces a deeper, more pronounced exhaust note compared to stock, especially under acceleration and load. However, it is tuned to remain manageable for daily driving and towing, avoiding overly harsh or droney characteristics in the cabin for most owners.
Because the S6130AL is a DPF-back system that does not remove or tamper with the diesel particulate filter or other upstream emissions devices, it is often considered an emissions-friendly upgrade relative to turbo-back systems. Nonetheless, emissions regulations vary by state and region, so customers should always verify local laws and compliance requirements before modifying their exhaust.
Aluminized steel offers a lower price point while still providing improved corrosion resistance over bare steel thanks to its protective coating. Stainless systems such as MBRP’s Armor Plus or Armor Pro lines provide greater long-term corrosion resistance, especially in harsh winter or coastal environments, but cost more up front.
MBRP backs its aluminized Armor Lite / Installer Series systems, such as the S6130AL, with a multi-year limited warranty that covers defects in materials and workmanship under normal use. Cosmetic surface rust, heat discoloration, and corrosion from extreme climates or neglect are generally excluded from coverage.
By reducing post-DPF backpressure and improving exhaust flow, a 4" filter-back system can contribute to lower exhaust gas temperatures under heavy load compared with a more restrictive stock setup. While gains vary by truck and usage, many performance exhaust owners choose upgrades like this specifically to support towing and sustained high-load driving.
Under many circumstances in the U.S., simply installing a DPF-back exhaust does not automatically void a vehicle’s entire factory warranty; instead, dealerships must link a modification directly to a failure to deny coverage on that component. Vehicle owners should consult their dealer and review their vehicle warranty terms for specifics, as policies and interpretations can vary.
The aluminized S6130AL can be used in such environments, but corrosion will generally occur faster than with stainless steel systems, especially where salt or brine is used on road surfaces. For long-term durability in these conditions, many owners prefer to step up to MBRP’s stainless Armor Plus or Armor Pro series, while those in moderate climates often find the aluminized system a strong value.
For Ram 2500/3500 owners wanting a cost-effective way to unlock better sound, improved flow, and a cleaner rear-exit look while keeping factory emissions hardware intact, the MBRP S6130AL 4" Filter-Back Single Side Exit exhaust offers a well-balanced solution that pairs naturally with the heavy-duty use these trucks are built for.
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