Quote:
Originally Posted by LJ47
The LJ Superformance MKIII Cobra we track uses QA1 they are valved for the weight of the car and supplied from Superformance USA. They have preformed well over the last 5 years with no issues and have good tune ability. The road car used Bilsten as standard. I recommend you use an experienced shock installer or retailer the ride and safety of your car is the most important thing track or street.
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Good advice there. For my own setup I went through detailed specifications and use-case discussions with the Penske agent in Australia, who subsequently valved and setup the shocks to suit including providing full dyno results on every shock setting permutation and the >50 page Penske 7500 technical manual. Buying off the shelf you're going to get what you get, and it wont necessarily suit the car no matter brand of shock it is.