DetailsToyota GT86 with Helmholtz Chambered Rear Silencers. The chambers change the frequency of the exhaust, hence no drone which is a common characteristic of the car. Along with the Silenced Centre, the exhaust sound is a nice burble and track day friendly, and at 5000 rpm is around 88db. The exhaust will come as standard in 2.5" pipework but can be made in 2 3/4" (70mm) - please ring us to order. Delivery usually 4 x weeks from order.