We have started our Dynomax No Limits promo from March 1 to August 31, 2011. This is a great opportunity to upgrade your cat back exhaust system. Dynomax® Performance Exhaust | Stainless Steel Exhaust Systems, Cat-Back Systems, Axle-Back Systems and Mufflers Check here for the closest retailer to you. As always we offer our 90 day risk free trial offer. If, for any reason, the qualifying products* don't live up to your expectations within the first 90 days, replace the products and we will refund your original product's purchase price (which shall not exceed the manufacturer’s suggested retail price), plus labor (up to $50 per exhaust system). We're that confident you will be satisfied with DynoMax® performance products! We just launched three new exhaust systems for the 2011 Mustangs. 5.0 Dual Cat Back Exhaust that gives you a gain of 16 HP and 16 more torque! 3.7 that gives you a gain of 11 HP and 10 more torque! 5.0 Dual Axle Back Exhaust that gives you a gain of 13 HP and 13 more torque! Dynomax® Performance Exhaust | New Products | Stainless Steel Exhaust Systems Thanks all.