1-3/4 headpipes with 18mm and 12mm O2 ports. 2x2 design allows fitment of stock heat shields. Advanced inner collector for maximum performance. Made to fit with stock slip-on mufflers or Bassani Xhaust slip-on mufflers. The California Air Resources Board ("CARB") does not permit the use of aftermarket emission-related parts, devices, or systems that alter the performance of OEM emission-related devices unless CARB has issued an Executive Order, other than on racing vehicles on closed courses. Before you unwrap your parts double check your fitment and once unwrapped, look the item over before trying to install it. If you can snap a picture of the damage and notify us ASAP we can replace the order right away. Notify us right away so we start the process. We're happy to step in and get the ball rolling. An estimated restock date will be provided at the time of cancellation. This item is in the category "eBay Motors\Parts & Accessories\Motorcycle Parts\Exhausts & Exhaust Systems\Headers, Manifolds & Studs". The seller is "easternpc" and is located in this country: US.