Originally Posted by
bookwyse
Removing all of the cats makes a huge difference but only iif you can improve the air intake as well. Big cones only work if like myself you get plenty of cold air feeds to it.
Mine was the result of five years trial and error, we were running two cars in parallel with similar mods to determine which mods worked and which didn't.
I was planning on having two, one through a morrete and one underneath the car.
Sound like mainfolds and decat(s) are a must! Thanks you two
my mates not gunna be very happy my my mondy beats his focus st