I've got a blob radiator in mine and a bugeye bottle if that helps? I cleaned mine out with a bottle brush and pressure wash last time I dropped the coolant - not as new but good enough for me.
While you're working in that area take a good look at the hard cross over pipe from the modine under the engine as this rots badly. Also the water pump pipes (small L shaped pipes behind the timing covers).
http://www.importcarparts.co.uk/part...y=&searchPart=
£36 not much to pay for peace of mind.
Or £46 for the bling version!
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2005 Spec B 6MT - KiDO tuned (~270Bhp)
Custom exhaust - Cosworth filter - Samco Intake - Tints - Bilstein B8/B6 & STI springs - SuperPro ALK - Whiteline positive shift kit, rack mounts, rear adjustable camber bushes, front ARB mounts & strut brace, 20mm rear ARB with AVO mounts, - Hardrace Gearbox and pitch mounts - Prodrive PFF7's - Front Brembos - Kenwood CarPlay - 1/2 carbon grille - STI front splitter