Ever since BBK first showed their new Varitune adjustable performance mufflers at the SEMA show a few years back - we have heard that BBK has been flooded with requests from magazine and automotive editors to do the first install and independant test. Well Tech Editor KJ Jones at 5.0 Mustang & Super Fords Magazine was the lucky first recipient to install and dyno test the all new Varitune axle back exhaust system for the new coyote Mustang GT. A few weeks back KJ took the kit over to a local southern Californian Mustang specialist GTR Hi Performance in Rancho Cucamonga California to do the install and independant test at their facility and test it on their dyno. The kit was installed on a bone stock 12 Mustang GT 5.0 and from the results we see here in this article from the 5.0 Mustang & Super Fords October 2013 issue it looks like the new Varitune axle back system picked up a solid 10 Horsepower and 10 ft/lb torque at the rear wheels! Take a look at the great range of sound adjustment they were able to obtain by checking the DB readings in the article. This independant test proves that these Varitune mufflers are not a gimick - they are the real deal, check out this article for more in depth information and look out for these BBK Varitune performance exhaust systems and mufflers on our website in the upcoming weeks for many popular late model american muscle cars and trucks.
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