S-line 458 owners can upgrade their current system with our new Valvetronic 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.
ALL SALES ARE FINAL. RETURNS & CANCELLATIONS are approved at Normal Guy LLC’s discretion. You are responsible for any tariffs assessed on your order.
Any items that are returned will incur a 25% restocking fee. Any item that is cancelled will incur a 15% fee due to our loss of time and other fees we may have incurred processing your order.
For details click HERE.
