Easily adjusted Impulse Optional for adjusting the shock absorber position, this carbon fibre shock tower enables you to further tune your Impulse to make it suit your driving style.The rear tower offers 5 alternative stiffer shock positions to increase your ability to fine-tune the car for any condition. This rear shock tower can also be used on the Impact M2. There is a shock tower also available for the front of the car that offers 4 alternative stiffer shock positions.