Why Upgrade to an MBRP Exhaust on Your Jeep Wrangler?

Upgrading your Jeep Wrangler’s exhaust system with an MBRP setup delivers a noticeable boost in both sound and performance. Known for their durable construction and aggressive tone, MBRP exhausts are designed to improve exhaust flow, which can unlock a few extra horsepower and torque, especially when paired with other modifications. The deep, resonant rumble—without the drone—is a hallmark of MBRP’s engineering, making it a favorite among off-road and daily-driver owners alike. This guide walks you through every step of installing an MBRP exhaust system on your Wrangler, from gathering tools to final testing, so you can enjoy that signature sound and extra performance safely and correctly.

Whether you drive a JK, JL, or JT Gladiator, the installation process is largely similar, but it’s crucial to verify your specific MBRP kit’s fitment. MBRP offers systems in aluminized steel and T-304 stainless steel, each with different weight and corrosion resistance. Choose based on your climate and budget. With proper preparation and attention to detail, you can complete the installation in your garage in a few hours.

Tools and Materials Needed

Before starting, gather all necessary tools and materials. Having everything within reach avoids mid-job trips to the hardware store and ensures a smooth workflow. Here’s a comprehensive list:

  • MBRP Exhaust System Kit – verify it matches your Wrangler’s year, engine (3.6L Pentastar, 2.0L turbo, etc.), and model.
  • Socket set – metric and SAE, mostly 10mm, 13mm, 15mm, and 18mm sockets. A deep socket for stubborn nuts is helpful.
  • Wrench set – combination wrenches in the same sizes; a ratcheting wrench speeds up work.
  • Jack and jack stands – a floor jack and at least two sturdy jack stands (3-ton capacity recommended). Never work under a vehicle supported only by a jack.
  • Safety glasses and gloves – exhaust work can send rust flakes and debris into your eyes; gloves protect against sharp edges and hot surfaces.
  • PB Blaster or penetrating oil – essential for loosening rusted bolts and exhaust hangers.
  • Exhaust sealant – optional, but recommended for slip-fit joints to prevent leaks and ease future disassembly.
  • Rubber mallet or dead blow hammer – to tap stubborn hangers loose without damaging rubber isolators.
  • O2 sensor socket – if your system requires unbolting the O2 sensor and you don’t have a crow’s foot.
  • Torque wrench – to tighten hardware to spec (MBRP provides recommended values).
  • Ramps (optional) – if you don’t have a jack, ramps can work, but stands are safer for full removal.

MBRP exhaust systems typically come with all necessary clamps, gaskets, and hardware. Open the box and inventory parts against the instruction sheet. If anything is missing, contact MBRP support before starting.

Preparation and Safety

Vehicle Positioning and Safety

Park your Wrangler on a level, solid surface. Engage the parking brake and chock the rear wheels. If you have a manual transmission, leave it in gear (or in Park for automatic). Allow the engine and exhaust system to cool completely—ideally overnight—if the vehicle was driven recently. Hot exhaust components can cause severe burns.

Lifting the Vehicle

Use a floor jack to raise the rear of the Wrangler (or the entire vehicle if you prefer). Place jack stands under the frame rails or axle tubes (refer to your owner’s manual for safe lift points). Never rely solely on a jack. For exhaust work, having the vehicle high enough to slide the old exhaust out and the new one in is critical—about 18–24 inches of clearance from the ground to the frame is typical. Double-check that the stands are stable before crawling underneath.

While not strictly necessary for a cat-back system, disconnecting the negative battery terminal prevents accidental short circuits when working near the O2 sensors or wiring. It also resets the ECU, which can help it adapt to the new exhaust flow more quickly once you reconnect and drive.

Removing the Old Exhaust System

With the vehicle safely lifted and the exhaust cool, follow these steps to remove the factory system. Apply penetrating oil to all bolts and hanger studs 10–15 minutes before you start working.

Step 1: Locate and Remove Exhaust Hangers

Modern Wranglers have several rubber hangers supporting the exhaust along the underbody. Use a flathead screwdriver or pry bar to gently push the rubber isolator off the metal stud, or unbolt the hanger bracket from the frame. A rubber mallet can help free stubborn hangers. It’s easier to remove the hangers while the exhaust is still loosely supported, so work from the rear forward.

Step 2: Unbolt the Exhaust from the Catalytic Converter

Locate the flange connection between the factory cat-back pipe and the catalytic converter (or the downpipe on diesel models). Depending on your Wrangler’s exhaust manifold setup, there may be a donut gasket or flat flange with a gasket. Use a socket and wrench to unbolt the flange nuts. If they are seized, apply more penetrating oil and use a breaker bar. Caution: if the bolts strip or break, you may need to drill them out—consider replacing them with stainless hardware during reassembly.

Step 3: Remove the Muffler and Tailpipe

Once all hangers are free and the front connection is unbolted, carefully slide the old muffler and tailpipe out from under the vehicle. On some models, you may need to angle or rotate the assembly to clear the axle and spare tire carrier. Have a helper assist if needed. Inspect the old system for rust, holes, or damage—this can indicate other issues like clogged mufflers or failing hangers.

Installing the MBRP Exhaust System

Now it’s time to install your new MBRP exhaust. MBRP systems are typically “cat-back” (from the catalytic converter back) and come in sections that clamp together. Follow the kit’s specific instructions, but these general steps apply to most Wrangler kits.

Step 1: Pre-Fit the System

Before tightening any clamps, loosely assemble the entire exhaust on the ground to confirm all pieces fit correctly. Check clearance around the spare tire, axle, shock mounts, and frame. MBRP systems are mandrel-bent and should align without interference. If something is off, loosen clamps and adjust; do not force connections.

Step 2: Install the Muffler Section

Start at the front: slide the provided clamp over the catalytic converter neck, then position the MBRP inlet pipe (which includes the muffler) and hand-tighten the clamp. Do not fully tighten yet. Attach the hanger(s) to the muffler bracket and slide rubber isolators into place. Ensure the muffler is not contacting the underbody—leave about 1/2 inch of clearance.

Step 3: Attach the Intermediate Pipe and Tailpipe

Connect the rest of the exhaust sections using the clamp and slip-fit joints. MBRP often uses band clamps or lap-joint clamps; apply a thin layer of exhaust sealant inside each joint for a leak-free seal and easier future disassembly. Secure hangers as you go. Check that the tailpipe exits cleanly past the rear bumper and does not point toward the ground or directly at the spare tire.

Step 4: Tighten All Hardware to Spec

Starting from the front and working back, tighten all clamps and bolts using a torque wrench. MBRP typically recommends 30–50 ft-lbs for clamps—consult your kit’s instructions. Overtightening can collapse pipes or strip threads. Also torque flange bolts to factory specifications (usually 30–35 ft-lbs for exhaust flange nuts). Check that hangers are properly seated in rubber isolators; they should not be twisted.

Step 5: Verify Clearance and Heat Shields

Spin the drive shaft by hand (if accessible) to ensure the exhaust does not contact it. Also check that the exhaust is not too close to brake lines, fuel lines, or plastic heat shields. If anything is within 1 inch, adjust the pipe or add heat shielding. Some MBRP kits include a heat shield for the muffler—install it per instructions.

Post-Installation Checks and Testing

Before lowering the vehicle, do a thorough final inspection. Start the engine (with the vehicle still on jack stands) and listen for any rattles or leaks. Do not rev the engine excessively while on stands; just let it idle. Check all joints with a soapy water spray bottle – bubbles indicate a leak that needs tightening. Also check that the O2 sensor wiring (if any) is not touching the pipe or getting hot.

Lowering the Vehicle

Once you are satisfied with the fit and no leaks are present, carefully lower the Wrangler to the ground. Reconnect the battery if you disconnected it. Start the engine again and let it idle for 60 seconds. Walk around the vehicle and listen for any unusual noise—ticking, hissing, or vibrating. A slight initial smell of paint burning off the new exhaust is normal and will dissipate after the first drive.

Test Drive and Sound Assessment

Take the Wrangler for a test drive on varied roads: stop-and-go, highway, and gentle off-camber turns if possible. Note the sound from inside the cabin. MBRP exhausts are known for a deep tone without excessive drone, but with the top and doors off your Wrangler, the sound will be louder. If you hear a metallic buzz, check clearance under the vehicle again. If the tone is too loud for your taste, consider a resonator or MBRP’s optional silencer insert for certain models.

After the test drive, re-torque all clamps and bolts once the system has cooled. Metal expands when hot, and components can settle, so a second tightening ensures a secure fit. Check for any new leaks or contact points.

Performance Expectations and Real-World Gains

Installing an MBRP cat-back exhaust on a Wrangler typically yields 5–10 horsepower and 5–10 lb-ft of torque, depending on the engine and existing modifications. The real benefit is in the mid-range response, where the improved flow helps the engine breathe more freely. Pairing the exhaust with an intake and a tune can multiply those gains. Sound-wise, expect a deep rumble at idle that turns into a crisp, controlled bark under acceleration, with minimal drone at cruising speeds. Many owners report a more enjoyable driving experience and a sense of power that was missing from the quiet factory exhaust.

Keep in mind that adding a high-flow exhaust may require a recalibration of the engine’s air/fuel ratio, especially on newer JLs with sensitive emissions controls. A performance tuner can optimize the tune to take full advantage of the exhaust, but many drivers notice a difference without any additional mods. For the best results, consult with a Jeep specialist and consider a complete intake-tune-exhaust combo.

Maintenance Tips for Your MBRP Exhaust

To keep your MBRP exhaust performing and sounding its best for years, follow these simple maintenance steps:

  • Inspect clamps and bolts quarterly. Off-road vibrations can loosen hardware. Re-torque to spec after every major trail run.
  • Check for rust or corrosion. If you opted for aluminized steel (vs. stainless), the coating can wear off. Touch up with high-temp paint (e.g., VHT) if bare metal appears. Stainless steel can still develop surface rust from contamination – polished stainless steel cleaner helps.
  • Clean the exhaust tips regularly. Use a dedicated chrome or stainless steel polish to remove carbon buildup and road grime. This prevents pitting and maintains the show-quality look.
  • Listen for changes in sound. A sudden increase in volume or a new rattle often indicates a loose clamp, broken hanger, or an exhaust leak. Address it promptly to avoid further damage.
  • Apply anti-seize compound. When servicing hangers or clamps, coat the studs and bolts with a nickel-based anti-seize to prevent seizing in the future.
  • Consider an annual undercarriage rinse. If you wheel in mud, salt, or sand, a gentle spray down around the exhaust helps remove corrosive materials. Avoid high-pressure direct hits on flex pipes or clamps.

With proper care, an MBRP exhaust system can outlast your Wrangler. The stainless steel versions come with a limited lifetime warranty, and aluminized steel is covered for several years—register your kit on MBRP’s website to activate the warranty.

Frequently Asked Questions

Does MBRP exhaust void my Jeep warranty?

No, an aftermarket exhaust cannot void your entire vehicle warranty. Under the Magnuson-Moss Warranty Act, the dealer must prove that a specific modification caused a failure to deny a warranty claim. However, if an exhaust leak damages an O2 sensor or catalytic converter, that repair may not be covered. Keep your factory parts in case you need to return to stock for dealer visits.

Can I install an MBRP exhaust on a diesel Wrangler (EcoDiesel)?

Yes, MBRP makes specific cat-back and DPF-back systems for the 3.0L EcoDiesel JL and Gladiator JT. The installation is similar but involves additional sensors and a DEF injection point. Follow the instructions for your specific diesel kit.

Will the exhaust improve fuel economy?

Real-world reports are mixed. On the highway, the reduced backpressure can allow the engine to run more efficiently, potentially improving fuel economy by 1–2 MPG. However, the more aggressive sound may encourage you to step on the gas, which can reduce economy. Your driving habits are the biggest factor.

How loud is MBRP compared to other brands?

MBRP is known for a refined deep tone that is louder than stock but not obnoxious. Compared to straight-pipe systems or some budget brands, MBRP’s mufflers include internal tuning to reduce drone. They test extensively to provide a “no-drone” guarantee on many of their systems. On a scale of 1 to 10, with 1 being stock and 10 being open headers, MBRP is usually a 6 or 7 at idle and 8–9 under wide-open throttle.

Resources and Further Reading

For more detailed information directly from the manufacturer, visit the official MBRP website for product specs, sound clips, and installation videos: MBRP Exhaust Systems. For community advice and real-world experiences, check out the Jeep Wrangler forums: JL Wrangler Forums or Wrangler Forum. If you need to purchase tools, a reputable online retailer like Summit Racing carries a wide selection of sockets, jack stands, and torque wrenches. Finally, refer to your Wrangler’s factory service manual for torque specifications and wiring diagrams—available from dealerships or online resources like Mopar Tech Authority.

Conclusion

Installing an MBRP exhaust on your Jeep Wrangler is a rewarding weekend project that transforms both the sound and feel of your vehicle. With careful preparation, attention to detail, and the right tools, you can achieve a professional-grade installation that provides years of trouble-free enjoyment. The deeper tone, modest power gains, and quality construction make MBRP a top choice for Wrangler owners who want to stand out without sacrificing drivability. Once you’ve followed this guide and tightened down the last clamp, go out and hit the trail—you’ll immediately notice the difference. Enjoy the rumble.