Companies to use (so far)

[Mr. Clarkson]

www.saturnmotorsports.com
www.gravanatuning.com
www.courtenaysport.co.uk

all have great products, and courtenaysport ships to the US if you ask nicely 

[hrb5711]

I tried your gravatuning link and it didn't work.

Is this the site http://www.gravanatuning.com/   ?

www.crutchfield.com was very helpful for me picking out my h/u and speakers, and they have amazing tech support, even for the Astra.

www.astraownersclub.com has some great how-tos and info also.

And I know someone else was asking where to find stubby ant.

www.Stubbyantenna.com any under the VW GTI should work, that is where I got mine.

[Mr. Clarkson]

yes, i did mean gravanatuning.com, my bad. 

[Nimraynn]

www.astraownersclub.com has some great how-tos and info also.

I'm a member of that website, very useful! Met a few of the guys from AOC at a VBOA Heritage Day at the Vauxhall HQ in Luton, UK.  Gotta love that Astra 888.

Another website I use for help & general Vauxhall chat, I use MIG Performance Vauxhalls @ http://www.migweb.co.uk. It's the UK's largest Vauxhall club, AFAIK.

[Scott]

www.astraownersclub.com has some great how-tos and info also.

I'm a member of that website, very useful! Met a few of the guys from AOC at a VBOA Heritage Day at the Vauxhall HQ in Luton, UK.  Gotta love that Astra 888.

Another website I use for help & general Vauxhall chat, I use MIG Performance Vauxhalls @ http://www.migweb.co.uk. It's the UK's largest Vauxhall club, AFAIK.

www.AstraOwnersNetwork.co.uk is also another good website for advice.  The people on there are much more friendlier than on AOC and the guy who "Owns" it also owns a tuning company (although it is for Diesel Cars only) they can still offer very good advice when it comes to the Astra.