noise, inside and outside

[purple charlie]

looking for opinions and info.
my C4 1987 has twin 3 inch pipes, previous or previous previous owner fitted them with silencers. So, over 10 years they have been on the car . The new section 59 laws are supposed to be tightening up. whats the chances they are picked up . I do tend to drive quietly , I'm not a boy racer... any thoughts, don't really want to buy a new system as these are solid and Ive just retired...

second question, the radio does not work... that's not the problem, I wouldn't be able to hear it anyway. The exhaust does sound loud in the car, sometimes have to have windows open as makes it quieter, when the motor is pulling, under load, the droning exhaust is louder. Anyone recommendations on noise deadening the underside of the car?

 

[Chevrolet]

Does the car still have the "Y" pipe at the back that goes into the backs of the exhausts/mufflers or silencers as you call them? If not, previous owner may have bought/fitted aftermarket "straight pipes" you could get that run straight from the manifolds to the silencers, bypassing the catalytic converter? More power/more noise?

 

[purple charlie]

not really had a good look under, only seen under at the mot and was looking elsewhere but cant see a Y piece, or cat, just a pair of mufflers under the trunk

 

[Roscobbc]

Certainly sounds like a previous owner has junked the original system and replaced it with something aftermarket. If the mufflers are a bullet shaped unit perhaps they may be of a 'straight through' design. These rely on internal wadding to deaden the sound. This is often glass fibre which can deteriorate with age and can get noisier. Why not go to an exhaust centre that deals with American cars and replace them with something new and quieter?