Hi Im thinking of getting a full decat exhaust for my 97 classic. Is it worth me getting a 3" system rather than a two inch??? what are the advantages?

if i get a 3" system will i have trouble at MOT time when want i swop my decat for the standard pipe or will it fit ok??

Any help is appreciated
Thanks

 

If your running 350bhp plus then 3 inch is good but the 2.5 inch is fine.

Bob

 

Im not running over 350.. so will i not notice any difference between 2.5 and 3 then??