Was looking at various manufacturers 2 & 2.5" BB. One manufacturer indicated a 2" exhaust extension was also "required". None of the other manufacturers mentioned this "requirement". Can anyone shed some light on the need of an exhaust extension?

2012 White 4 door JK Unlimited, manual 6 speed, Cooper Discoverer ATP LT285 /70 R17, Spidertrax 1.5" wheel spacers, Rampage front & rear tubular bumpers, Rampage tubular side steps, Daystar 1" BL, K&N air filter, Front & rear GraBars, Innovative JK Products rear seat recline kit, Smittybilt 2" receiver, Cobra 18WXSTII CB Radio, Firestik II FS3-B antenna, Rugged Ridge CB mount

 

Im assuming they meant something like this. Just drops that driver side enough so the Jeeps front driveshaft does not make contact with the exhaust when at full droop

Teraflex 2610000 - Teraflex Exhaust Spacer Kit for 12-15 Jeep® Wrangler & Wrangler Unlimited JK with 3.6L - Quadratec