Parts for your 2007 Subaru Impreza-Manifold gasket

2007 Subaru Impreza manifold gasket

Technical references confirm a manifold gasket is absolutely used on the 2007 Subaru Impreza. The Subaru Factory Service Manual and OEM parts catalogues specify intake and exhaust manifold gaskets across the EJ-series engines in this year, and turbo WRX/STI variants add up-pipe and downpipe gaskets. Major aftermarket catalogues (Fel‑Pro, Mahle, Victor Reinz) also list direct-fit manifold gaskets for these models. So the manifold-gasket is relevant and fitted on the 2007 Impreza.

This gasket’s job is simple but critical: it seals the join between the manifold and the engine to keep things airtight (intake) or gas-tight (exhaust). On the intake side, a good seal stops unmetered air sneaking in, which would send fuel trims haywire and cause rough idle, hesitation and lean codes. On the exhaust side, it prevents hot gases, noise and fumes escaping under the bonnet, protects nearby components from heat, and keeps oxygen sensors reading correctly. Turbo models rely even more on proper sealing to build boost efficiently and keep spool-up crisp.

As part of routine servicing, it’s smart to check for tell-tales of a tired manifold gasket:

• Hiss or whistle on cold start, ticking that speeds with revs, or a sooty trace at a flange
• Rough idle, lean codes, or fuel economy down the gurgler (intake leaks)
• Exhaust smell under the bonnet or cabin fumes (exhaust leaks)
• On turbo models, laggier boost and a sharper exhaust note

Replacement is straightforward for a competent DIYer with a torque wrench and a bit of patience. Best practice on a 2007 Impreza is to replace gaskets any time a manifold is removed—exhaust gaskets are single-use crush designs, and intake gaskets lose resilience once compressed. Fit new quality gaskets (MLS for exhaust