I have a H13 and a H14 arb here

I have checked them and the most i can get is a 3mm between the 2 ( the H14 BEING THE LONGER ) so thats the 1 degree gain.

I doubt that will cause you any big issues .

You can quite clearly see that the shape between H13 / H14 is totaly different .

Cant you move the front bumper forwrd a tiny bit ?

Going back to the H13 will make the car drive worse ,, even more so if you have bigger wheels

I have never had any issues with the rs500 or later 3 doors that has the H14 fitted as std