and the decat isnt restrictive so you wont no whats going to happen untill fitted. why not be safe and port your wastegate its not that hard
no its not hard but you can also lower the life of the turbo.
porting the wastegate is not the answer to what you want to do!
if you are hitting fuel cut porting the wastegate is no real help!
yes a de-cat and uprated mani will free up exhaust gases and and increase performance it will also prolong the life of the engine.
will you hit fuel cut? as mention it varies from car to car. only way to find is to do it to your car.
you can still drive the car if you hit fuel cut just means dont put the boot in so hard!
you can change your air filter to and after market in side the engine bay without getting many problems.
the problems arise when people relocate the filter to the front bumper.
this is because you are sucking in colder air and getting a much higher flow of air.
if you hit fuel cut you need to look at FCD's RRFPR and SAFR's or emanage
not to mention getting them set up properly by someone who knows what they are doing! so your fueling is running correctly.
there are some really helpfull guides to hitting fuel cut and also the pro's and con's of relocating the airfilter in the archive section
just use the search function mate is real helpfull.