Below is a video of Kooks Headers and mid pipe with a Roush cat back

Raptor 6.2L Kooks Long Tube Headers and Y-Pipe

Add nearly 40 HP to your 6.2 Raptor truck with Kooks custom longtube headers and cat pipe assembly. This 304 Stainless steel system comes with 1-3/4" primaries or 1-7/8" Primaries that measure a whopping 32" long! This kit is going to provide a ton of low end power and throttle response along with peak power gains as well! Dyno tests have show over 30 HP gain at the wheels! Not only are you going to notice big power gains, but a sound that will bring music to your ears. This kit comes complete with hardware and gaskets ready to install.

Raptor 6.2L Kooks Long Tube Headers and Y-Pipe Benefits:

• Increase Horsepower and Torque
• Better sounding exhaust
• Great Looks
• High quality 304 Stainless Steel Construction
• Fits Crew & Extended Cab 

Raptor 6.2L Kooks Long Tube Headers and Y-Pipe Includes:

• Your choice of Primary Tube Size
• Your choice of High-Flow Cats, or Green cats
• All hardware for easy install

Raptor 6.2L Kooks Long Tube Headers and Y-Pipe Fits:

• 2010 6.2L Ford SVT Raptor F-150
• 2011 6.2L Ford SVT Raptor F-150
• 2012 6.2L Ford SVT Raptor F-150
• 2013 6.2L Ford SVT Raptor F-150
• 2014 6.2L Ford SVT Raptor F-150