Upgrading your vehicle's exhaust system with an MBRP Challenger Exhaust is one of the most rewarding modifications you can make. You gain noticeable horsepower, a throaty sound, and a more aggressive look—all while benefiting from MBRP's reputation for quality craftsmanship. However, a successful install isn't just about bolting on parts; it demands careful preparation, correct tooling, and attention to detail. This guide provides comprehensive installation tips for the MBRP Challenger exhaust, focusing on achieving a seamless fit and optimizing sound. Follow these steps to ensure your new exhaust performs flawlessly for years.

Preparation: Tools, Safety, and Workspace

Preparation is the single most important factor in a smooth installation. Rushing into the job without the right tools or a safe setup nearly guarantees problems—stripped bolts, leaks, and frustration. Take the time to gather everything you need before you lift the vehicle.

Essential Tools and Materials

While the MBRP Challenger exhaust kit includes all necessary hardware (clamps, hangers, and in some cases, bolts), you must supply the following:

  • Socket and ratchet set – A complete set ranging from 8mm to 19mm. Deep sockets help reach recessed fasteners.
  • Combination wrenches – Same size range as your sockets, for tight spots where a socket won't fit.
  • Torque wrench – Essential for proper clamp and bolt tightening; many installs suffer from over-tightening that deforms flanges.
  • Breaker bar – For stubborn, rusted bolts; a ½-inch drive bar gives the leverage you need.
  • Penetrating oil (e.g., WD-40 Specialist or PB Blaster) – Apply to exhaust hangers and bolts 24 hours before starting.
  • Jack and jack stands – Never rely on a floor jack alone. Use four jack stands rated for your vehicle's weight (min. 3 tons).
  • Safety glasses and gloves – Rust flakes, debris, and undercarriage grime demand eye and hand protection.
  • Pry bar or exhaust hanger tool – Rubber hangers can be very tight; a dedicated tool prevents damage to the new hangers.
  • Angle grinder or reciprocating saw (only if you must cut the old exhaust – many MBRP systems bolt directly to factory flanges).
  • Anti-seize compound – Apply to clamp threads to prevent future corrosion and ease removal.

Safety First

Work on a level, hard surface – asphalt or concrete. Engage the parking brake and chock the rear wheels. Raise the vehicle high enough to work comfortably under it (usually 18–24 inches of clearance). Double-check that jack stands are seated on solid frame points, not on suspension components or exhaust pipes.

Workspace Tips

Good lighting is critical. A portable LED work light or a headlamp makes a huge difference when you're lying under the vehicle. Lay out the MBRP exhaust components on a clean tarp or cardboard to avoid scratching the finish. Check all parts against the instruction sheet to confirm you have the correct mid-pipes, muffler, tailpipe, and clamps. Also verify that no damage occurred during shipping – dents or bent flanges will cause alignment headaches later.

Key Strategies for a Seamless Fit

MBRP designs their Challenger exhaust systems with precision mandrel bends and quality materials, but every vehicle ages differently. Rusted flanges, misshapen hangers, and minor shifts in the drivetrain can complicate installation. Use these strategies to ensure your new exhaust fits perfectly without forcing anything.

Slide Everything Together Before Tightening

This is the cardinal rule of exhaust installation. Do not fully clamp any joint until the entire system is assembled and loosely supported by the hangers. Start by slipping the mid-pipe onto the catalytic converter or downpipe flange, then add the muffler, then the over-axle pipe, and finally the tailpipe. Use the supplied rubber hangers to hang each section. With all parts in place, you can shift sections left, right, up, and down to achieve perfect alignment.

Check Clearance Points

Before you tighten anything, rotate the tailpipe tips so they are centered in the bumper cutouts. Then check these critical clearance zones:

  • Frame and crossmembers – Ensure at least ½ inch between any exhaust pipe and the frame or crossmember; vibration over time can lead to contact and rattles.
  • Shock absorbers and springs – The over-axle portion must not touch the shock body or coil spring, especially during suspension compression.
  • Spare tire well or fuel tank – Maintain a generous gap (1 inch minimum) to avoid heat transfer and physical contact.
  • Driveshaft – On vehicles with a one-piece or two-piece driveshaft, keep exhaust away from the shaft and any heat shields.

Pro tip: While the system is loose, use a ratchet strap to temporarily pull the exhaust into its final position. This frees your hands to check all clearance points at once.

When to Loosen the Exhaust Hangers

Sometimes the new exhaust's hanger rods do not align exactly with the factory rubber mounts. If the hanger is offset, use a pry bar to gently reposition the rubber mount on the vehicle's bracket. Avoid cutting or modifying the new exhaust hangers. In extreme cases, you can purchase aftermarket adjustable rubber hangers that allow you to fine-tune height and lateral position.

Torque Specifications

Over-tightening is a major cause of exhaust leaks and damaged flanges. MBRP recommends the following torque values for Challenger systems (always confirm with the specific instruction sheet included with your kit):

Connection TypeTorque (ft-lbs)
Band clamps (2.5" – 3")35–40 ft-lbs
V-band clamps30–35 ft-lbs
Ball flange connections40–45 ft-lbs
Hanger bracket bolts15–20 ft-lbs

Use a torque wrench on all clamp nuts. If you don't have one, tighten until snug and then add another ¼ turn – but this is a poor substitute for precise torque.

Sound Optimization: Fine-Tuning Your Tone

MBRP Challenger exhausts are known for their deep, aggressive sound without excessive drone. However, you can further tailor the note to your preference through installation choices and complementary upgrades.

Resonated vs. Non-Resonated Tips

Some MBRP Challenger kits offer a choice between resonated and non-resonated exhaust tips. Resonated tips contain a small internal chamber that absorbs high-frequency sound waves, resulting in a deeper, slightly quieter tone. Non-resonated tips let more raw sound out, adding a sharper edge. If you want a milder idle with a aggressive bark at full throttle, choose resonated tips. If you want maximum auditory presence, go with non-resonated.

Clamp Tightness and Sound

Believe it or not, clamp torque directly affects exhaust note. Loose clamps allow gases to escape at joints, creating a hissing sound that robs power and alters tone. Conversely, over-tightening can distort flanges and create a tinny, vibration-prone note. Always use the recommended torque values – your sound will be deeper and more consistent.

Adding a Helmholtz Resonator or Muffler Bypass

If you find the MBRP tone too boomy or drone-prone in the 1500–2000 RPM range, consider adding a Helmholtz resonator (j-pipe) on the mid-pipe. This cancels specific frequencies without restricting flow. Some advanced users also bypass the muffler section on track days, though this is illegal on public roads. Alternatively, you can install a custom X-pipe or H-pipe crossover to balance exhaust pulses and smooth out drone – consult with a professional exhaust shop.

Tips and Finishing Touches

  • Tip angle – Slightly angling the tips downward (2–3 degrees) can reduce cabin drone by redirecting sound waves away from the trunk floor.
  • Sound deadening in the cabin – Add butyl rubber sound deadener to the trunk floor and rear wheel wells for a quieter interior without changing the external exhaust note.
  • Exhaust wrap – Wrapping the mid-pipe with heat wrap can change sound reflection and reduce under-hood temperatures, but it may trap moisture and shorten pipe life. Use only high-quality wrap designed for stainless steel.

Post-Installation Checks and Break-In

After you've tightened everything and performed a visual alignment, you're ready for the first start-up. But don't just drive off immediately – a few checks ensure your work is sound.

Initial Start-Up and Idle Test

With the vehicle on jack stands, start the engine and let it idle for 2–3 minutes. Walk around the vehicle while listening for leaks – a hissing sound at any joint means a clamp needs adjusting. Also look for smoke coming from joints, which indicates exhaust leakage. Check under the vehicle for any touching of pipes against the chassis – you'll hear a metallic tapping if something is too tight.

Re-Torque After Heat Cycle

Stainless steel expands when hot and contracts when cool. After the first heat cycle (drive the vehicle until the exhaust is hot, then let it cool completely), all band clamps should be re-torqued to spec. This is the most common oversight that leads to later rattles and leaks. Many installers also perform a second re-torque after 500 miles of driving.

Listen for Drone

Drive through various RPM ranges: idle, 1500 RPM, 2000 RPM, 2500 RPM, and highway speeds. Note any frequency that resonates heavily inside the cabin. If drone is unacceptable, you may need to add a resonator, adjust hanger positions, or add sound deadening. MBRP Challenger systems are designed to minimize drone, but vehicle-specific factors (body style, insulation, panel damping) can amplify certain frequencies.

Common Installation Mistakes to Avoid

Even experienced DIYers make these errors. Knowing them in advance will save you time and frustration.

Forcing Alignment

If a pipe won't slide into place, do not use a hammer on the tubing. Instead, loosen adjacent clamps, reposition hangers, or apply lubricant (soapy water) to the rubber grommets. Forcing can dent pipes and distort flanges, leading to permanent leaks.

Ignoring Hanger Orientation

Rubber hangers are designed to support the exhaust in a specific orientation. Installing them upside down or crooked puts twisting stress on the pipes. Each hanger usually has a natural curve that matches the exhaust rod – pay attention to that curve.

Skipping the Final Clearance Check

After tightening everything, do one more walk-around with the vehicle on the ground (suspension loaded). Suspension droop when on jack stands can change exhaust-to-chassis clearances. Lower the vehicle, bounce the suspension a few times, and recheck all critical gaps.

Using Cheap Clamps

MBRP provides quality band clamps with their kits. Never substitute standard exhaust U-bolts – they crush pipes, cause leaks, and look unprofessional. If you lose a clamp, order a genuine MBRP replacement or a high-quality Walker band clamp of the correct size.

Performance Benefits Beyond Sound

A properly installed MBRP Challenger exhaust does more than enhance the auditory experience. The mandrel-bent, smooth stainless steel tubing reduces backpressure and improves exhaust gas scavenging. You can expect:

  • 5–15 horsepower gain (depending on your vehicle's engine and existing exhaust restriction).
  • Improved throttle response – Less restriction means the engine breathes easier, especially in the mid-RPM range.
  • Weight reduction – Factory exhausts are often made of heavy mild steel with double-wall thicknesses. An MBRP stainless system saves 15–30 pounds.
  • Corrosion resistance – 409 or 304 stainless steel outlasts factory exhaust many times over, especially in states that use road salt.

To maximize these benefits, pair your MBRP exhaust with a cold air intake and a performance tune. The combination can unlock double-digit horsepower gains and a truly exhilarating driving experience.

When to Seek Professional Help

While the MBRP Challenger exhaust is designed for a DIY install, some situations call for a shop's expertise:

  • Severe rust on the original exhaust – bolts may snap off in the flange, requiring drilling or replacement of the catalytic converter.
  • Lack of a proper workspace or tools.
  • Custom modifications needed to adapt the system to a unique vehicle configuration.
  • If you're uncomfortable working under a raised vehicle or lack experience with exhaust systems.

A professional install typically costs between $150 and $350, which includes welding if needed, and gives you the peace of mind that everything is aligned and leak-free.

External Resources for Further Guidance

Final Thoughts

Installing an MBRP Challenger exhaust is one of the most satisfying weekend projects you can do. With careful planning, the right tools, and attention to alignment, you'll achieve a system that fits perfectly, sounds incredible, and adds tangible performance. Remember to slide everything together before tightening, stick to torque specs, and perform the heat-cycle re-torque. Your vehicle will reward you with a deep, clean exhaust note and a noticeable punch in acceleration every time you hit the throttle.