Craig, the front and rear towers fit the standard BJ4 AE shocks, the front and rears are both from 4mm carbon fibre, and i have them in stock at the moment.
The S4 towers do use revised shock angles which are different to the standard BJ4 setup, but i can give you the setup we use with the Losi shocks and convert it across to the AE shocks.
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Jonathan | Atomic-Carbon
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