Anybody know what kind of hp gains (over stock) can be seen with a 4" MBRP turbo back exhaust? Is it different with a tune (ie. Predator 65 hp)?
On an LMM....
Stock RWHP 300 RWTQ 525.............DPF, cat and muffler in place...
With Exhaust RWHP 317 RWTQ 567.....No cat, DPF and with a muffler.
17hp and 42 lb/ft torque.
One of our vendors did it recently.