QUOTE(hyuanl @ Jan 15 2018, 02:41 PM)
Posting a photo of 408 E-thp Rear Wheel Suspension.
As I can see there's no Anti Roll Bar but a huge U shaped Member.
Asked a few shops, No ARB available for 408
Or just the U shaped bar is enough to replace ARB??
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The rear suspension is a Torsion Beam. Torsion beam is like a 2 in 1 suspension set up. It works as a suspension component and also a anti-roll bar. The "U" shape design works like a ARB.
In the previous 408, the Torsion Beam is hollow with a bar inside it, to further reinforce the rigidity of the Torsion Beam. Not sure about the Ethp design though. But im guessing it should be the same.
You can custom make a ARB. Ultra Racing can do for you but u need to drill holes on the bottom spring bracket. IF you willing to drill hole, then ask them to do it for you.
My advise, try not to stiffen the rear too much. Too stiff in the rear will then to make the rear slip out (over steer). The car's stability system will kick in to correct oversteer. So if too stiff and u take corners, the ESP will keep on kicking in. Damn kacau.
Hope this information help