guys

posted it in here as well just incase

at the moment i have got a 3'' decat downpipe a 3'' decat centre and a 3'' backbox with a 5'' exit pipe and if i am honest it is too loud for my taste (no offense to others) due to the 3'' bore i can not replace the backbox with a samller exit pipe to reduce the noise or fit a centre cat to reduce the noise and emissions as standard/afteramrket systems are 2.5'' bore to my knowledge.

and obviously it will fail its mot as well come feb

my trouble is i dont want too much of a power decrease but i appreciate that i will end up anyway.

i need some pointers do i feel i have 2 choices (any others will be welcome)

1) replace the down pipe with a standard cat downpipe then run a decat centre and a back box of my choice
2) replace the decat down pipe with a samller bore ( i am aware of a 3'' entry to 2.5'' exit decat downpipe) and then fit a centre cat and backbox of my choice

which will give me the best power output?

and also the car has been remapped for both decats if i fit one of these cats will it cause any harm to the mapping or will it need doing again as i dont want to cause any harm to the engine etc?

please some advise is needed

many thanks

steve

also when this is done anyone interested in the above system?