Kooks is different on these cars because they're a mid length header vs the others which are true longtubes. The advantage to them are the o2 placements. These cars while not big in displacement love to breath especially in the upper rpm's so a 1 7/8 primary works well. Even N/A.
2017 Dodge Challenger T/A Redline Tri-Coat
2015 Dodge Challenger Scat Pack Jazz Blue Pearl Sold
2015 GT Premium 401A Ingot Silver Sold
2011 GT Premium 401A Grabber Blue Sold