Magnaflow has highflow catted connection pipes available for the 6.1 cars and they will soon be producing them for the 5.7s too!
Testing has shown an 8hp gain with this under the SRT-8 cars. Similar gains are expected from the 5.7. More info will be posted soon!

Testing has shown an 8hp gain with this under the SRT-8 cars. Similar gains are expected from the 5.7. More info will be posted soon!