Parts for your 1999 Mitsubishi Lancer-Exhaust gasket

1999 Mitsubishi Lancer exhaust gasket — what it does and when to sort it

Yes, the 1999 Mitsubishi Lancer uses exhaust gaskets. Technical sources including the Mitsubishi Motors Lancer/Mirage CE Workshop Manual (1996–2003) and the Mitsubishi ASA electronic parts catalogue list multiple gaskets in the exhaust system: an exhaust manifold-to-cylinder head gasket, a front pipe “doughnut”/ring gasket at the manifold or catalytic converter join, and flat flange gaskets further down the system. Aftermarket catalogues commonly used in AU/NZ workshops (e.g., Permaseal, Fel-Pro) also specify these gaskets for CE-series Lancers. So an exhaust gasket is absolutely relevant to this model.

On a 1999 Lancer, the exhaust gaskets seal the hot, high-pressure gases as they leave the engine and move through the manifold, front pipe, cat and mufflers. The manifold gasket is typically multi-layer steel to handle heat cycles, while the front pipe often uses a tapered metal/graphite ring that lets the joint flex with engine movement. Downstream flanges can use composite or steel gaskets depending on the section.

They’re not a routine “replace by kilometres” item, but they do wear out from heat, vibration and corrosion, and should be renewed whenever a joint is disturbed. During regular servicing or before a WoF/RWC, a tech should check for soot marks at joins, ticking on cold start, exhaust fumes in the cabin, or a raspy note under load — all classic signs of a leak. A leaking gasket can skew oxygen sensor readings, bump up fuel use, and land the car with an emissions or noise fail.

• Best practice when replacing: always fit new gaskets if a joint is undone