I know the "sprint " & 75 FI exhaust manifolds are better than the stock 1.9 ones. But are the 2.0/2.2 exhaust manifolds even better to use on a modified 1.9? I see they are available "new" in Europe for the price of used 1.9 Sprint/75 FI ones here in the USA. That's if you can even find one here. Other than the larger flange, anything need modified to use these?