[Ant]

All the shocks mentioned are up to the job but comparing Bilsteins to Koni and QA1 you pay for what you get I have Bilstein custom shocks they cost as much as top of the line double adjustable Koni's and the Bilstein isn't adjustable on the car it has to be sent back to supplier for valving etc.

QA1 are an entry level shock that are 12 step adjustable and probably good quality, like some of the basic Koni and Bilsteins which are generally lighter duty as in road use. Some people put these light duty shocks on Cobra's and unless they have self aligning rod end style bushes and are valved to suit your springs its pretty much a waste of money and your better off to get a decent shock that has a good sized shaft etc.

I got supplied with 11mm shaft Bilsteins which in my opinion are not up to the needs of a Cobra they are designed for a small road car, this is what a crappy supplier provided me with until I went to the country supplier and showed them what I was fitting to and they free of charge provided me with a 14mm diameter shaft shock. Some resellers think charge him for custom race shocks and supply an entry level performance shock and make more money!

Maybe your shocks need the rebound stiffened up and or spring adjustments.