After a previous owner decided to inject some extra noise to the engine bay of my 2 litre Focus Zetec, by way of a dodgy K&N induction kit, I'm on a bit of a quest to rip it out. Its noisy, got a hole in it (somehow), and does somewhere in the region of naff all.

I've heard that replacing the standard filter (in a standard airbox) with a K&N / Pipercross panel filter, using a ST170 snorkel & an 2.0l Auto Air Deflector is considerably better than using a daft induction kit (and probably a lot cheaper - much to my disgust, Halfords want £95 for a new K&N 57i induction kit thingy).

Basically, Im on a bit of a quest to hunt the Ford parts down, since the previous owner hasnt decided to give me the original airbox. I figure, if I need a new airbox, I may aswell get an ST170 one to fit the snorkel in, rather than hack up a brand new standard one to get it to fit.

If anyone can validate these part numbers (and give me the ST170 airbox number & a rough cost) it would be much appreciated!

2.0L Auto Air Deflector: #1212560 about £8 with VAT
ST Snorkel: #4359190 £21 With VAT
ST170 Airbox: ___________ (fill in the blanks )

If anyone knows of any mail order / online places that are likely to sell these parts cheaper than a typical local Ford garage, that'd be grand too!

Finally, anyone know how to stop it raining in England? Its bloody annoying trying to polish a car so I can take some photos, only for it to be covered in shite again 2 seconds later!

Cheers guys & girls.

Alistair.