The Steeda Challenger Exhaust System is engineered to deliver a noticeable boost in both horsepower and torque, while producing an aggressive, deep exhaust note that enthusiasts crave. Upgrading your Challenger's exhaust is one of the most rewarding modifications you can make, as it not only improves sound but also reduces backpressure, allowing the engine to breathe more freely. This guide provides a comprehensive, step-by-step approach to installing the Steeda exhaust system in your garage, ensuring a professional-level result without the need for a shop lift. Whether you're a seasoned DIYer or a first-time installer, following these instructions carefully will help you achieve that bold exhaust note you're after, along with improved throttle response and a more visceral driving experience.

Tools and Materials Required

Having the right tools on hand before you begin will make the installation smoother and safer. Below is a complete list of what you'll need, along with some optional items that can ease the process.

Essential Tools

  • Steeda Challenger Exhaust System – Ensure the kit matches your Challenger model year and engine configuration (e.g., 5.7L HEMI, 6.4L, or SRT Hellcat).
  • Socket set – Metric sockets ranging from 10mm to 21mm, including deep sockets for hard-to-reach bolts.
  • Wrench set – Combination wrenches in the same sizes, plus a flex-head wrench for awkward angles.
  • Jack and jack stands – A low-profile hydraulic jack and a pair of heavy-duty jack stands rated for your Challenger's weight.
  • Safety glasses – Protect your eyes from falling debris, rust, and penetrating fluid splashes.
  • Mechanics gloves – Heavy-duty gloves to protect your hands from sharp edges and hot surfaces.
  • Penetrating lubricant spray (e.g., WD-40 Specialist or PB Blaster) – Essential for loosening corroded bolts and hangers.
  • Torque wrench – A 1/2-inch drive torque wrench capable of readings up to 150 ft-lbs to ensure proper clamp and bracket tension.

Optional but Helpful Items

  • Exhaust hanger removal tool – Makes disconnecting rubber hangers much faster and easier.
  • Flathead screwdriver – For prying stubborn hangers or aligning bolt holes.
  • Anti-seize compound – Apply to threads and contact points to prevent future corrosion.
  • Shop rags or drop cloth – Keep your driveway clean and contain any oil or debris.
  • Extension bars and universal joint – For the socket set, helps reach fasteners in tight spaces.

Gathering everything ahead of time will reduce frustration and keep the project moving forward.

Preparation: Setting Up for Success

Proper preparation is critical for a safe and efficient installation. Take the time to organize your workspace and prep the vehicle.

Vehicle Positioning and Safety

  • Park your Challenger on a level, solid surface such as a concrete garage floor. Avoid gravel or uneven pavement.
  • Engage the parking brake firmly. For extra safety, chock the rear wheels with wheel stops.
  • Disconnect the negative battery terminal. This prevents accidental shorting, airbag deployment, or electrical damage while working near sensors and wiring.
  • Jack up the rear of the vehicle using the factory jacking points. Place jack stands under the designated lift points on the frame rails or differential housing. Do NOT rely solely on the jack.
  • Shake the vehicle gently to confirm it is stable on the stands before sliding underneath.

Inspect the Existing Exhaust System

Before removing anything, visually inspect the stock exhaust for rust, damage, or prior repairs. Check the condition of the exhaust flanges and hangers. If bolts show heavy corrosion, apply penetrating lubricant generously and let it sit for 10–15 minutes. This step will save you time and broken bolts later. Also, take a reference photo of the stock system's routing—this can help during the new installation if confusion arises.

Removing the Stock Exhaust System

With the vehicle safely raised, you can begin unbolting the factory exhaust. Work methodically to avoid damaging the new components.

Unfastening Clamps and Connections

  • Start at the rear and work forward. Locate the exhaust clamps that join the muffler sections, intermediate pipes, and resonators. Use the appropriate socket or wrench to loosen them. Some clamps may be U-bolts that require two wrenches.
  • If the bolts are seized, apply more penetrating oil and wait a few minutes. Use a breaker bar or impact wrench if available, but be careful not to strip the threads.
  • Remove any bolts securing the exhaust to the catalytic converter downpipes or H-pipe/X-pipe. These typically use flange nuts and may require a socket with extension.

Disconnecting Hangers

  • Each exhaust section is supported by rubber isolators (hangers). Use a flathead screwdriver or hanger removal tool to pry the metal hangers out of the rubber grommets. Work slowly to prevent tearing the rubber.
  • For stubborn hangers, spray lubricant into the rubber channel to ease removal.

Removing the Exhaust Sections

  • Once all clamps and hangers are free, slide the stock exhaust components off the vehicle. You may need to wiggle sections past control arms or the rear axle. Having a helper can make this much easier.
  • If any sections are stuck due to rust, tap gently with a rubber mallet to break the bond. Do not use a metal hammer directly on the pipes.
  • Set the old exhaust aside. Inspect the mounting points for wear; if you notice broken studs or stripped threads, address those now before fitting the new system.

Installing the Steeda Challenger Exhaust System

With the stock exhaust removed, you're ready to install the Steeda system. These components are precision-engineered, so proper alignment is key to avoiding rattles, leaks, or unnatural stress on the hangers.

Pre-Installation Checks

  • Unpack the Steeda exhaust and verify all components are present: mufflers, intermediate pipes, tips, clamps, and any gaskets. Cross-check with the manual included in the box.
  • Wipe down the pipes with a clean cloth to remove any shipping oils or debris. Pay attention to the flange faces where gaskets will sit—they must be clean and dry.

Dry Fitting and Alignment

  • Starting from the front, loosely assemble the system under the vehicle without tightening any clamps. Slide the flanges onto the exhaust studs or downpipe connections. Use the manufacturer-supplied gaskets if provided; otherwise, reuse the original gaskets if they are in good condition.
  • Work toward the rear, connecting each section. Ensure the pipes do not touch the underbody, brake lines, or drivetrain components. There should be at least 1/2-inch clearance on all sides. Rotate the pipes as needed to achieve this.
  • Attach the hangers to the factory mounting points. You may need to apply a small amount of soapy water to the rubber grommets to slide the metal hanger tabs in easily.
  • Loosely install the exhaust tip clamps and position the tips to your liking—centered in the bumper cutouts, with even gaps, and at the desired depth.

Torquing and Final Tightening

  • Once all sections are positioned and tips are aligned, begin tightening from front to rear. Use a torque wrench to avoid over-tightening. Recommended torque values: flange bolts 30–40 ft-lbs, U-bolt clamps 20–30 ft-lbs, tip clamps 10–15 ft-lbs. Confirm with the Steeda manual as specific models may vary.
  • After all bolts are torqued, go back and check each hanger. The rubber isolators should be free of twist and not under tension at an angle.
  • Double-check tip alignment one final time. Adjust if necessary by loosening the tip clamp, repositioning, and retightening.

Important: Do not fully tighten all clamps until you are satisfied with the entire system's fitment. You may need to adjust clearances after the engine is warm and the system has settled.

Final Adjustments and Quality Checks

Before lowering the car, perform a thorough check of the installation to ensure everything is secure and properly aligned.

Clearance Inspection

  • Crawl under the vehicle and visually trace the entire exhaust path. Look for any points where the pipe might contact the body, fuel tank, heat shields, or suspension components. Even a minor contact can cause vibration noise or heat transfer.
  • If you find interference, loosen the relevant clamps and rotate the pipe or reposition the hanger. Re-tighten and recheck.

Tip Adjustment

  • Stand behind the car and evaluate the tip placement. Both tips should be at the same height and protrude equally from the bumper. Use a measuring tape if needed. The goal is a symmetrical, factory-like appearance.
  • If the tips have adjustable angles, set them so the outlet faces straight back or slightly downward to avoid directing exhaust onto the bumper.

Reconnect Battery and Lower Vehicle

  • Reattach the negative battery cable and tighten the terminal clamp. Ensure the cable routing does not contact any moving parts.
  • Remove the jack stands carefully, then lower the vehicle using the jack. Do this in the reverse order of lifting: raise slightly to clear stands, remove stands, then lower fully.

Testing the New Exhaust System

The moment of truth. Fire up the Challenger and listen for that aggressive note. But don’t stop there—perform a systematic evaluation.

Cold Start and Sound Check

  • Start the engine with the vehicle in Park, parking brake engaged. Let it idle for 30 seconds. Notice the initial startup sound—it may be louder until the idle smooths out.
  • Walk around the car and listen for any abnormal sounds like rattling, hissing, or metallic pinging. A hiss could indicate a leak at a gasket or clamp. If you hear anything concerning, shut off the engine and investigate.

Leak Detection

  • With the engine running, carefully feel around each joint and clamp for escaping air. Use gloves or a piece of tissue paper—if the paper flutters near a connection, there's a leak.
  • Alternatively, use a soapy water spray (dish soap mixed with water) on all joints. Bubbles will appear at leak points. Tighten the affected clamp slightly and recheck.

Test Drive

  • Take the Challenger for a 10–15 minute drive on a mix of low-speed streets and moderate highway speeds. Listen to the exhaust note under light throttle, cruising, and moderate acceleration.
  • Notice any drone or resonance at specific RPMs. Some aftermarket exhausts have a drone band; if it's bothersome, you may need to add sound-deadening material or adjust the tune (on SRT models).
  • After the drive, park and check for any new rattles or contacts. The system may shift slightly as it heats and cools. Re-torque the flange bolts and clamps if needed—many builders advise a re-torque after the first heat cycle.

Conclusion: Enjoy the Bold Sound and Performance

Installing the Steeda Challenger Exhaust System is a rewarding project that transforms both the sound and driving character of your car. Beyond the aggressive exhaust note, you'll benefit from reduced backpressure, improved flow, and a small but noticeable gain in horsepower and torque. By following this step-by-step guide, you've ensured a safe, leak-free installation that will deliver years of enjoyment.

To keep your Steeda exhaust performing at its best, periodically inspect the clamps and hangers for tightness, especially after the first few weeks of use. Clean the tips regularly with a metal polish designed for stainless steel to maintain their bright finish. Avoid driving through deep water or harsh road salt if possible; if you live in a snowy climate, consider a ceramic coating or applying a corrosion inhibitor to the underside.

For more information on Steeda products and other performance upgrades, visit the official Steeda website. For general exhaust installation tips and safety guidelines, check out resources from Hemi Performance and Mopar. If you encounter any difficulties during installation, the Steeda support team offers technical assistance via phone or email.

Now it's time to hit the road and experience the thrill of your upgraded Challenger. That bold exhaust note is more than just noise—it's the sound of performance unleashed.