just dont buy aftermarket gaskets, and get atleast 3 nut seals per side. Aftermarket gaskets always leak after a few years, where genuine seem to be made out of better quality rubber, and they fit!!

For genuine gaskets, you are looking at about 150 all up for all the gaskets, and half moons, plus labour. but it is well worth it.

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Version 6 STI

Just got mine replaced...400 sounds about right but i also changed sparkplugs just to be on the safeside...

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My car does the Kessal run in less than 12 parcecs. She's fast enough.

i replaced mine on sunday. took me 1.5 hours from go to woe.
removed half of the CAI to get access into rocker cover, undo 8 rocker cover bolts using a 1/8 inch 10mm socket, remove rocker cover, replaced rocker cover gasket x 1, spark plug hole gaskets x 2 and rocket cover bolt gaskets x 8. wipe down gasket surfaces, replace rocker cover lightly tensioned all the bolts, and nipped them up several times in sequence.

cost me $115 in parts from subaru ozzy park.

Easy DIY...

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Long live the Classic!
MY99 - 245hp & 360Nm.......Best ET - 12.771s