Now available from Lethal Performance is this exhaust combo kit. Choose from the Lethal Performance H or X resonator delete to go with the Flowmaster American Thunder axle back.

Lethal Performance resonator deletes are constructed from 2-1/2" 409 stainless steel and removes all 2" sections from the stock exhaust, something no other resonator delete does. Includes all hardware and clamps to complete the install. Instructions are provided and also available for download for preview below.

The Flowmaster American Thunder axle back is built from 3" 409 stainless steel and features 4" polished stainless tips. Offers a nice, aggressive tone at WOT but is still moderate at cruise. Axle back fits coupe only

Flowmaster’s American Thunder Axle-back exhaust system for the 2015 Ford Mustang GT is perfect for the person looking for an aggressive sound level both inside and outside of the car, with all of the performance benefits that you would expect from Flowmaster. This bolt-on DOR (Dual Out Rear) emissions-legal system for cars with the 5.0L engine features a pair of Super 44 Series mufflers and dual mandrel bent 3.00in tailpipes for maximum performance. The system is built out of 409S stainless steel and utilizes 4.00in stainless steel tips. The exhaust system is manufactured in the USA and is covered by Flowmaster’s Lifetime Limited Warranty. Designed for an easy fit, this system includes all necessary parts and hardware for installation.

Note: This system fits hardtops and convertibles.