aFe Large Bore-HD 4 IN DPF-Back Stainless Steel Exhaust System w/Black Tip (49-46113-B) 1584 BBK O2 extensions use OEM

BBK O2 extensions use OEM connectors and heat protective sleeves make installation a snap

The shell comes in 2 types

It has a stainless steel brace to provide rigidity and curves around the back of the tube to deflect convective heat away

updates include prominent branding and blacked-out circuit boards make the SR-M PRO more powerful and refined than ever before

aFe Large Bore-HD 4 IN DPF-Back Stainless Steel Exhaust System w/Black Tip (49-46113-B) 1584 BBK O2 extensions use OEMLarge Bore HD Stainless Steel DPF Back Exhaust System with Single Side Exit (49 46113 B) by aFe. Exhaust System Type: DPF Back. Exhaust Tubing Material: Stainless Steel. Main Tubing Diameter: 4". Exhaust System Sound: Moderate. Get increased exhaust flow, more horsepower and torque, improved performance and lower exhaust gas temperatures with the aFe Large Bore HD DPF Back Exhaust System. aFe dyno tests every system for maximum gains, and constructs