We have four Aero Turbine 5050XL mufflers left in stock to liquidate, they are going at $170 with free ground shipping in the 48 states and the first 3 orders will get a cool Aero Turbine wall banner and the last will get a Aero Turbine spring type jacket, we also have a couple Aero Turbine hats left also if anybody would want one with a muffler also. Please send a email to sales@alloutdiesel.com to order.