Upgrading to an axle-back exhaust from AWE Tuning is one of the most rewarding modifications you can make to your vehicle. It sharpens throttle response, unleashes a richer exhaust note, and often sheds weight from the factory system. However, achieving a perfect installation requires more than just unbolting the old mufflers—it demands proper preparation, attention to hardware torque, and careful alignment of the tips. This guide walks through every stage of the process, from the tools you need to final system checks, so you can enjoy your AWE exhaust without leaks, rattles, or misaligned tips.

Preparation and Tools

Before you slide under the car, gather everything you’ll need. Good preparation saves time and prevents frustrating trips to the hardware store mid-job.

Required Tools

  • Socket set – 10mm, 13mm, 15mm, and 18mm sockets are common for most vehicles. A ratcheting wrench in the same sizes helps reach tight fasteners.
  • Torque wrench – Essential for tightening clamps to manufacturer specifications. Over-tightening can strip threads or deform clamps; under-tightening invites leaks.
  • Breaker bar – Stock exhaust bolts are often rusted or seized. A breaker bar provides the leverage needed to break them free without damaging hardware.
  • Flathead screwdriver – Useful for prying rubber hangers off their mounts without tearing the isolators.
  • Penetrating oil (e.g., PB Blaster or WD-40 Specialist) – Spray on bolts and hangers 15–20 minutes before starting.
  • Rubber mallet – Taps stubborn hanger mounts loose without damaging the exhaust pipes.
  • Jack and jack stands or a lift – Never work under a vehicle supported only by a jack. Use ramps or stands rated for your car’s weight.
  • Safety glasses and mechanic gloves – Protect your eyes from falling debris and your hands from sharp edges and hot components.

Workspace Setup

Choose a flat, well-lit area. If working on a sloped driveway, the car must be chocked on both front and rear wheels. Allow the exhaust to cool completely—even after a short drive, catalytic converters and mufflers retain heat that can cause burns. A creeper seat or mechanic’s mat makes reaching undercarriage hangers far more comfortable.

Removing the Stock Exhaust

Removing the factory axle-back is usually straightforward, but rust and corrosion can turn a 30-minute job into an afternoon project. Proceed methodically.

Step 1: Access the Hangers

Locate the rubber hanger isolators along the rear section of the exhaust. Most vehicles have two to four hangers supporting the muffler and tailpipe assembly. Spray each hanger with penetrating oil and let it soak for a few minutes. Using a flathead screwdriver or a pry tool, carefully work the rubber isolator off the metal mounting tab. Avoid twisting or pulling the rubber too hard; a sharp tug can tear an isolator. If a hanger is stubborn, use a rubber mallet to tap the tab while prying evenly.

Step 2: Disconnect Clamps and Bolts

The factory exhaust is typically connected to the mid-pipe by a band clamp or a flanged connection with two or four bolts. Use a breaker bar to loosen these fasteners—be prepared for resistance. If bolts snap (common in salt-belt cars), drill them out and replace with new stainless steel hardware. Once all clamps and bolts are removed, the axle-back section should slide off the mid-pipe. You may need to wiggle the muffler assembly back and forth to break any rust seal. Keep the original gasket if it’s in good condition, or replace it with a new one if provided by AWE Tuning.

Step 3: Remove and Inspect

Slide the stock exhaust out from under the car. Compare its weight to the new AWE unit—you’ll likely feel a significant reduction. Inspect the mid-pipe flanges for signs of rust or damage. Wire-brush the mating surface to ensure a clean seal, and check that the hanger tabs on the chassis are not bent or corroded.

Installing the AWE Tuning Axle-Back Exhaust

With the stock system removed, installation of the AWE exhaust proceeds in reverse order, but with important nuances that set it apart from simply bolting on parts.

Dry Fit First

Before tightening anything, hang the entire axle-back assembly loosely on the rubber isolators. This allows you to adjust the position of the pipes and ensure the tips align with the cutouts in the rear bumper. AWE exhausts are engineered for a specific fitment, but minor shifts can occur due to chassis tolerances. With all hangers engaged and the connection to the mid-pipe loosely attached, step back and check tip alignment from behind and from the side. The tips should be centered in the cutouts and parallel to the ground.

Torque to Spec

AWE provides hardware and clamps specifically designed for their systems. Use a torque wrench to tighten all fasteners to the values listed in the instruction manual. General guidelines: band clamps around 35–45 lb‑ft (47–61 N·m) depending on pipe diameter; flange bolts typically 20–25 lb‑ft (27–34 N·m). Over-tightening band clamps can collapse the inner pipe and restrict flow, while under-tightening causes leaks and a hissing sound at idle.

Adjusting the Tips

The final step is tip adjustment. With all clamps tightened, the tips may still shift slightly. Loosen the adjustable clamp at the tip hanger (if equipped), rotate and slide the tips to the perfect position, then retighten. Some AWE systems feature double-walled tips that can be adjusted independently of the muffler. Use a level to ensure vertical plumb, and measure from the driver-side tip to the passenger-side tip for symmetry.

Post-Installation Checks

Even an expertly installed exhaust can develop issues after the first heat cycle. Verify everything before taking your car on the road.

Visual Inspection

Check every connection point for signs of leakage. A small puff of smoke or soot around a clamp indicates a leak. Use a glove or a piece of paper to feel for escaping exhaust gas (do this only when the system is cool after a brief start). Tighten clamps incrementally until the leak stops, but again, don’t exceed torque limits.

Sound and Drive Test

Start the engine and let it idle. Listen for rattles from the tips contacting the bumper or from loose internal parts. Rev the engine gently through the RPM range (while parked) to hear if the tone is consistent. Drone or excessive resonance during the first few minutes is normal as the system breaks in; AWE’s patented drone-canceling technology usually eliminates unwanted frequencies once the exhaust reaches operating temperature. Take a short drive, paying attention to sound at cruising speeds and under load. Check for any vibration transmitted through the floor or seat rails.

Retorque After Heat Cycles

Metal expands when hot. After your first 20–30 miles of driving, allow the exhaust to cool completely, then recheck all clamp and bolt torque. This “cold torque” ensures connections remain tight as the system settles into its thermal cycle.

Performance and Sound Expectations

AWE Tuning axle-back exhausts are engineered to deliver a balanced sound profile—aggressive when you accelerate, refined during highway cruising. The key difference from many competitors is AWE’s use of drone-canceling 180° technology in certain models. This design uses opposing sound waves to cancel out low-frequency resonance inside the cabin, making long drives comfortable without sacrificing external volume.

In terms of performance, expect a modest horsepower gain (typically 5–8 hp at the wheels) and a slight improvement in throttle response due to reduced backpressure. Weight savings range from 10 to 25 pounds depending on the vehicle, contributing to better handling dynamics. The sound matures after about 500 miles as the muffler packing settles and the pipes develop a subtle patina. Initial notes may be slightly raspy, but after break-in, the tone deepens and becomes more refined.

Maintenance Tips for Your AWE Exhaust

With proper care, an AWE Tuning axle-back will last the life of the vehicle. Keep these practices in mind:

  • Clean the tips regularly – Use a quality metal polish or a dedicated stainless steel cleaner to remove road grime and prevent pitting. For carbon buildup on the inner tips, a soft brass brush works without scratching.
  • Inspect hangers and clamps annually – Rubber isolators degrade over time. Replace any that show cracking or excessive stretch. Retorque clamps during every oil change.
  • Protect against corrosion – If you live in an area with salted roads, consider applying a high-temperature exhaust coating or ceramic spray to exposed pipe sections. Wash undercarriage regularly during winter months.
  • Listen for changes – A sudden increase in volume or a new rattle may indicate a loose clamp or a broken internal baffle. Address small issues before they lead to larger repairs.

Troubleshooting Common Issues

Tips Misaligned After a Few Weeks

Sometimes the exhaust shifts as the hanger rubber stretches. Realign by loosening the clamp(s) nearest the tip, repositioning the pipe, and torquing back. If misalignment recurs, replace the rubber isolators—they may have softened from heat or age.

Excessive Drone

While AWE’s 180° technology minimizes drone, some vehicles may still exhibit a slight boom between 1,800–2,200 rpm during the first few hundred miles. This typically fades as the exhaust packs in. If persistent, check that the exhaust is not contacting the underbody or a heat shield. A small clearance gap (¼ inch minimum) prevents structure-borne drone.

Leaking at the Mid-Pipe Connection

If you notice a puffing sound or a soot trace at the flange, the gasket may be damaged or the clamp not fully seated. Remove the clamp, clean both mating surfaces, install a new gasket, and torque evenly in a crisscross pattern.

Rust Spots on Stainless Steel

Surface “tea staining” can appear on some stainless alloys, especially in road-salt environments. This is cosmetic only. Use a stainless steel cleaner to remove it, and avoid aggressive abrasive pads that could scratch the finish.

Final Thoughts

Installing an AWE Tuning axle-back exhaust is a weekend project that transforms the driving experience. The company’s precision engineering means fitment is excellent on most applications, but taking the time to properly prepare, align tips, and torque every fastener pays dividends in long-term satisfaction. Whether you’re chasing a deeper rumble or a few extra horsepower, following these best practices ensures your AWE exhaust delivers peak performance, a leak-free seal, professional-grade appearance, and years of reliable service.

For further reading, explore the official AWE Tuning product page for application-specific details and sound clips. Installation videos from trusted sources like AWE’s YouTube channel offer visual guides for common platforms. And for a deeper dive into exhaust theory, check out Eastwood’s exhaust tech tips.