ISDC owner guides
Subaru guides for Irish owners
Practical know-how from 25 years of club members: passing the NCT, importing, servicing, and getting the right parts for your Impreza.
Owning one in Ireland
Failed the NCT on emissions? Read your results
Failed the NCT on emissions? How to read your CO, HC and lambda results and what they usually mean on a Subaru Impreza.
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Importing a Subaru to Ireland
Importing a Subaru to Ireland from Japan or the UK: VRT, customs and VAT, the 30-year €200 VRT rule, €56 vintage tax and NCT rules.
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Buying a used WRX or STI
Buying a used Subaru WRX or STI in Ireland: a checklist for paperwork, engine, turbo, gearbox, rust and brakes before you hand over money.
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Servicing and maintenance
Subaru Impreza service guide
Subaru Impreza WRX and STI service schedule: oil, brake fluid, gearbox oil, plugs, coolant and turbo care, with advice for older and imported cars.
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Subaru Impreza timing belt guide
When to change the timing belt on a Subaru Impreza WRX or STI, what to replace with it and the warning signs. EJ engines are interference engines.
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Impreza brake disc sizes by model
Standard brake disc sizes for every turbo Subaru Impreza, from the GC8 to the VA WRX STI: front and rear discs, calipers and minimum thickness.
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Subaru Impreza wheel alignment guide
Subaru Impreza wheel alignment explained: camber, caster and toe, what you can adjust on each model, reading tyre wear, and typical fast-road settings.
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Know your Impreza
Impreza chassis and model codes explained
Subaru Impreza chassis and model codes explained: GC8, GDB, GRB and VAB, how to read a code like GDBF4EH, and revision letters.
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Subaru Impreza special editions
Subaru Impreza special editions: 22B, P1, RB5, WR1, S202, S203, S204, RB320, CS400 and more, with years, numbers built and what makes each special.
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Impreza wheel fitment guide
Subaru Impreza wheel fitment: 5×100 vs 5×114.3, 56.1 mm centre bore, factory sizes and offsets by model, and which wheels clear the brakes.
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Gearboxes, diffs and DCCD
Subaru Impreza gearboxes, R160 and R180 diffs and DCCD explained, and why front and rear ratios must match before any swap.
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Impreza injectors and turbos explained
Subaru Impreza injectors and turbos: side-feed vs top-feed, factory injector sizes and which IHI VF turbo came on which model.
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Subaru Impreza turbos explained
Subaru Impreza turbos explained: which IHI VF or Mitsubishi TD04 turbo your car has, single vs twin scroll, upgrades and buying a used turbo.
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Got a question? Ask the club
Spotted a mistake, or want a guide on something else? Post in the forum and let us know.