Hey guys,

I had a compression test down to my block, because there was a fair bit of oil in the breathers, and turns out im down compression in 2 cylinders.

When it comes to fixing it, is it usually just the cylinders that need to be replaced? Or is there more under the surface that would need replacing too?

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MY02 WRX STI

Full Cosworth Internal Rebuild, Autronics tune, Cold Air Intake, 740cc Injectors, 3" TBE, 600hp Fuel Pump