To celebrate our 40th anniversary,we're offering a dual promotion: $30 off plus free shipping tocontinental U.S. destinations only on all cat back and complete exhaustsystems! Simply use coupon code XHAUST40 during checkout. Free shippingis for exhaust systems only, excluding truck freight items; regular shippingrates apply for additional items on your order; retail orders only; may not becombined with any other offer or discount; offer valid through September 24,2015