I would strongly advise against 2.25" piping. Far too larger for 99.999137% of the Duratecs out there.
I'd recommend 2" piping.
Will there be a balance pipe?
Proper placement of an X-pipe is not going to happen so a balance pipe for sound purposes (and likely a little mid range power) would be a good idea.
What is the weight disadvantage of true duals following the stock routing?
BTW - those asking for true duals for a 4 cylinder might want to go out and count their exhaust manifolds and cylinder heads. If the come up with more then one. It's NOT a 4-cylinder! Otherwise one bank equals one exhaust pipe.
Also those asking for true duals that have one exit are missing the ENTIRE point of having TRUE DUALS. Using a Y-pipe to make the 2 pipes into one is just as inefficient as stock and aalso not True Duals!
True Duals = seperate pipes for each bank.
Also bringing up the brullen "equal length"
is not the right idea to have.
Equal length is great if the bends are equal as well otherwise the pipe length will have to change in relation to the bends thus negating the whole "equal length" design theory.
