I went with the 3" down pipe as well as the lb7 style up pipe for my 06 lbz.
highly recommend the up pipe, much better than the block off plate.
paired with the 3" down pipe is a must, I can tell my truck is building boost quicker and getting the exhaust out faster.
Gird Heater Delete/Upgrad Plate For 2007-2024 RAM 2500/3500 6.7L Cummins|SPELAB
Jayden Wallentine
5 inch exhaust for 2008 Dodge megacab
This was a super simple install. Took about 45 minutes, which includes removal of old exhaust. Exhaust fit well and seems to be made of high quality. Truck sounds awesome!