Borla Product Description: Wake your 6.4L Hemi up with this awesome new Atak exhaust from Borla. This great system uses Borla’s new Atak multicore mufflers to create the most aggressive sound on the market. The system is fabricated from all 304 stainless, 2.75 Stainless steel, and includes a high flow X-pipe. Want a less aggressive sound? See S-type Exhaust PT# 140632.