I believe the ARBs of choice for Alfas are the Eibachs, and although I do not know this for a fact, I would not be surprised if the Autodelta ones were made by Eibach.
Another great ARB manufacturer are Whiteline
Although they do not list them for the 147 in their catalogue for some reason?? Worth a call to a UK distributor. Give some thought to the relative rigidity of front and rear bars, as it is the relationship between them that has the most effect on your handling balance. For example on my impreza I now have 22mm adj. in front and 24 mm adj at rear. With front at softest and rear at stiffest I get nearly neutral balance with very little understeer. Go for adjustable bars if at all possible.
ARBs plus the Koni suspension will transform your handling beyond recognition - the other things to look at are adjustuble top mounts, enabling a wider range of castor and negative camber to be applied, struts (top, bottom and rear) to improve your chassis rigidity, and if you have not already looked into this - play around with tyres and tyre pressures.
Re subframe - you have to decide if you can be arsed dropping the subframe, I gave it to my friendly indie to do. The rear is easy.
Originally Posted by marko
the anti roll bar is annoying me now, the front one at that, passenger side bush is squeaking like theres no tomorrow. i see there are many many aftermarket options available, the two i am looking at are the eibach and the autodelta... anyone have any pointers? price wise they are very similar. i am goting to be replacing the shocks and springs with koni adjustables when the ARBs are done... im hoping for a very tight setup, something that will handle exceptionally on the track. at present im sliding all over the place, its hopeless.
also, i understand to replace the front ARB the sub frame needs to be dropped... is this something i can do easily enough once shes up in the air or is it not worth the carry on and get my mates garage lads to do it?