S-line 458 owners can upgrade their current system with our new Valvtronic muffler. You can control wide open F1 madness or tame it down while you cruise through your neighborhood. No modification required. This upgrade can be easily installed with your current system. 

We are always loyal to our clients and we will offer discounts to those who have purchased 

systems prior to 11.25.20. We recommend adding the Forza Componenti valve controller. This component will be offered on our website soon.

S-line 458 Valvetronic upgrade for existing S-line owners