As we have previously heard from more than a few aftermarket developers, the restrictive factory exhaust on the 2015 Mustang is one of the potential areas for some substantial power gains with just a little bit of elbow grease. For those who want to do without a catalytic converter for maximum power gains, the first cat delete pipes for the GT have been fitted by MAK Performance.
The MAK delete pipes have opened up the piping size from the factory 2-inches to a much larger 3-inches (comparison photo above) and of course removes the catalytic converter.
Dyno results will be posted soon, so check back on the development thread.