Thanks everyone for your help as regards this clunking its at low speed when turning it is front and rear cusco racing diffs iv read on internet these do make clunk sound is there anyone that might be able to shed light on this thanks

Tried youtube ?

Seems most weird noises or random car problems have been solved with the a of a video or two.

I guess your car will be pretty unique as i suspect most owners won't have upgraded the diffs to full blown race spec stuff.

You never know pop a vid up of the noise if you can, or a long shot email cusco and ask?

I can't comment on the Cusco diffs that much but have thought they would still not make much if any noise. 

 http://youtu.be/wWOEnU6UJ0o closest i can find for subarus

I guess they sound horrible at low speed and

Get better when up to speed ?

They are horrible at low speed suppose I will get use to it lol its good at fast speed tho thankyou all for help and welcoming me to the club