Parts for your 2008 Subaru Impreza-Exhaust mount

2008 Subaru Impreza Exhaust Mount

On the 2008 Subaru Impreza, exhaust mounts (also called exhaust hangers or cushion rubbers) are very much part of the design. Subaru’s 2008 Impreza Factory Service Manual and the official parts catalogue both show multiple rubber mounting points supporting the centre pipe and rear muffler across GE/GH/GR models, so the part is absolutely relevant to this vehicle.

These small rubber isolators do a big job. They suspend the exhaust away from the body and driveline, soak up engine pulses from the boxer four, and keep the tailpipe sitting neatly in the bumper cut-out. By isolating vibration, they reduce cabin buzz and protect welds, flanges and catalytic converters from fatigue. When a mount perishes or stretches, the system sags or shifts, which is when owners notice knocks over bumps, a tinny rattle at idle, or a muffler that sits off-centre.

As part of routine servicing, it’s smart to give the hangers a look at every 10,000–15,000 km, or any time the car is on a hoist. A quick check goes a long way:

• Inspect for cracking, glazing, or tears in the rubber.
• Wiggle the exhaust, excessive movement or contact with heat shields means a tired mount.
• Check clearances to the subframe, prop shaft and rear bar after any other underbody work.

Replacement is straightforward. Support the exhaust, spray the old mount with silicone spray, then lever it off the pegs. Fit the new mount the same way, making sure each peg is fully seated. If the vehicle runs a heavier aftermarket system, consider stiffer polyurethane hangers to control movement, just note they can pass a touch more vibration into the cabin.

Pro tips for longevity:

• Replace mounts in pairs on the rear muffler to keep it level.
• Use high-temp silicone rather than petroleum grease, which can attack rubber.
• After installation, start the engine and watch for movement, adjust bracket angles if needed.

Look after the mounts and the Impreza’s exhaust will stay quiet, aligned, and drama-free. That means fewer rattles, less stress on joints, and better comfort on Aussie and Kiwi roads, day after day.

How many exhaust mounts does a 2008 Subaru Impreza have?

Most 2008 Impreza models use four to six mounts, depending on body style and trim. Expect two at the rear muffler, one or two along the centre pipe, and one at the front/secondary pipe. A quick look on a hoist will confirm the exact count on the car.

What size hangers should be used — 12 mm or 14 mm?

Most factory hanger pegs on GE/GH/GR Imprezas are around 12 mm. That said, always measure the studs on your car and consider the exhaust brand fitted. Aftermarket systems sometimes use different peg sizes, so checking before ordering avoids a loose or overly tight fit.

Can worn mounts cause a WOF or roadworthy issue?

They can. If the exhaust is insecure, contacting the body, or rattling due to failed mounts, it may attract a note or fail until it’s secured. Fresh mounts restore clearance and stability, helping the car meet WOF/roadworthy expectations.