The Borla ATAK axle-back system replaces the factory mufflers and rear piping with 2.75 in mandrel-bent T-304 stainless tubing and two race-inspired ATAK mufflers, delivering Borla's most aggressive sound level. Acoustically-Tuned Applied Kinetics tuning shapes the muffler cores for a hard exterior tone while keeping the cabin free of harsh resonance. It finishes in a pair of 4.5 in polished stainless round rolled, angle-cut tips and installs as a direct bolt-on using factory hardware.
| Type | ATAK axle-back exhaust (aggressive sound) |
| Position | Rear (replaces mufflers and rear piping) |
| Pipe Diameter | 2.75 in |
| Material | T-304 stainless steel |
| Tips | Two 4.5 in round rolled, angle-cut |
| Finish | Polished stainless |
| Sound Level | ATAK (most aggressive) |
| Warranty | Borla Million-Mile Warranty |
| Part Number | 11799 |
This part fits:
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2011-2012 | Ford | Mustang | Shelby GT500 |
Shipping: In-stock orders placed before 3 PM EST ship the same day, and everything else ships within 24 hours. Standard, expedited, and overnight options are available at checkout. Backordered items ship as soon as we get them back in stock. Contact us for lead times. See the full Shipping Policy.
Returns: 30-day returns on new, unused items in original packaging. See the full Refund Policy.
