Thinking of exhaust mod

Mopar put an H pipe on the GTX 440 engine,
but not on the 340.

If the factory didn't think it was worth the $$.....??

I think it might help if your at 400 hp plus,
but, otherwise why bother.

I don't have the crossover on my car.

318 with a cam.

http://www.youtube.com/watch?v=Ud8mci4rjFU