Parts for your 2010 Subaru Impreza-Exhaust gasket

2010 Subaru Impreza Exhaust Gasket — Purpose, Service Tips, and FAQs

Technical sources confirm the 2010 Subaru Impreza uses multiple exhaust gaskets. The Subaru Factory Service Manual for 2010MY Impreza (GE/GH/GR/GV) specifies gaskets at the cylinder head to exhaust manifold, front pipe connections, and various flange joints. Subaru’s electronic parts catalogue (FAST), under Group 44 Exhaust, lists manifold gaskets and “gasket–exhaust pipe” donut/flange types for this model range, and major aftermarket catalogues (e.g., Fel‑Pro, Walker) also show required gaskets for both naturally aspirated and turbo variants. So yes—exhaust gaskets are absolutely relevant and fitted on the 2010 Subaru Impreza.

On this Impreza, exhaust gaskets do the heavy lifting of sealing incredibly hot gases as they leave the engine, keeping things quiet, efficient, and safe. Manifold gaskets (typically multi‑layer steel) seal the head-to-manifold joint, donut or ring gaskets handle the spring‑bolted slip joints at the front pipe and mid‑pipe, and flat flange gaskets are used further down the system. Turbo models add gaskets at the turbo to downpipe interface as well.

Keeping these gaskets healthy matters. A leaking gasket can cause a sharp tick or hiss on cold start, fumes under the bonnet or near the cabin, soot marks at a joint, and even dodgy oxygen‑sensor readings that knock fuel economy around. Because most exhaust gaskets are crush‑style, they’re designed for single use—once compressed by heat cycles, they won’t reseal properly after being disturbed.

Good servicing practice on a 2010 Subaru Impreza includes:

• Replacing any exhaust gasket that’s been separated during work—don’t reuse the old one.
• Inspecting for soot tracks, warping, or corrosion while the car’s on a hoist, pay extra attention around the manifold, front pipe, and spring‑bolt joints.
• Using quality OEM‑equivalent gaskets, avoid exhaust paste upstream of the catalytic converter as it can contaminate O2 sensors.
• Evenly tightening spring‑bolt and flange joints and following the service manual torque specs, on spring‑bolted donut joints, tighten evenly until the specified torque/length is reached.
• Applying high‑temp anti‑seize to studs/nuts and replacing fatigued springs, bolts, or cracked hangers to prevent future leaks.

There’s no strict kilometre interval—replace on condition or whenever the joint is opened. With regular checks and fresh gaskets at any disturbed joint, the Impreza’s exhaust stays quiet, leak‑free, and compliant with emissions rules across Australia and New Zealand.

Popular questions about the 2010 Subaru Impreza exhaust gasket

Does a 2010 Subaru Impreza have exhaust gaskets?
Yes. It uses manifold gaskets at the head, donut/flange gaskets at the front pipe and mid‑pipe, and additional gaskets on turbo models at the turbo to downpipe interface. These are documented in the 2010MY Subaru service manual and parts catalogue.

How often should exhaust gaskets be replaced?
There’s no fixed interval. Replace any time a joint is separated, when a leak is suspected, or if there’s noise, fumes, or soot at a flange. In practice, many last years, but once crushed and heat‑cycled, reusing them risks leaks.

What are the signs of a failing exhaust gasket?
A ticking or hissing sound on cold start, a whiff of exhaust under the bonnet, black soot marks around a joint, droning, or a check‑engine light tied to O2 readings. Any of these warrant an inspection and likely a fresh gasket.