Billet aluminum is a lot stronger and can bend/absorb the impact much better

keeping the petrol tank free from damage

anodised black-coloured surfaces

simply follow the instructions that you can find in the service kit

Visually integrated into the flyline

Wunderlich - Suspension Shock Absorber S4 Pro + HPA Options:Rear - Standard Billet aluminum is a lotFacts and Product Features of Wunderlich Suspension powered by TracTive S4 PRO HPA Shock Absorbers For extreme use: The PRO version. Extra reinforced high performance shock absorber of the latest generation as an upgrade or replacement for the stock suspension. Designed for the highest demands of demanding adventure riders who frequently go off road and touring riders who regularly travel with heavy loads, as well as for riders who desire extra safety