It depends on if your car has the 'anti squat geometry' or not.

The differece being is that the anti squat version uses a rubber bush connection, which in my experience doesn't fail as often as the standard suspension which uses the plastic link bars.

The anti-squat version uses a trailing arm made from cast aluminium, where the standard version uses a stamped steel version.

The difference in price is also large between the two types of link, the plastic ones being much cheaper, so make sure you order the correct ones.

Please also check the shock lower rubber bush, this is where is was clunking on my car.

Cheers,
Ben