Headers or Test pipes or both with stock exhaust?

After_Shock

Im sure this has been asked but I cant come across it in the search.

Has anyone changed the headers to short tubes with downpipes/test pipes and kept the stock exhaust?

Alternatively has anyone changed to long tube headers and kept the stock exhaust?

Im keen to improve responses a touch and give the car a bit more sound but where I live its hard to get away with changing exhausts and also I live in an area plagued by speed humps so dont want to risk lowering the pipes under the car. Having bigger exhausts or anything too loud will make me stand out to the police and cant be bothered with the chew.