DetailsThe back boxes come with a loud 4.5” tail pipe or a more subtle sounding one with a 3.5” tail pipe. This comes in 3" Pipework to fit either our 3" Centre or an aftermarket Centre Pipe. Please reply to your order confirmation stating which you would prefer (4.5" shown in picture). This item is made to order. Delivery normally approx. 4 weeks. If you would like a more accurate delivery time, please contact us.