depends on which engine yu mean

there are 2 the 2.5 and the 3 litre

have found that the 3 litre is a lot better

however having has a 2.5 V6 Mk1 mondy i know what they are like

If a head gasket goes it can be very expensive depending on how quickly it is caught.

Also there is a problem with oil surge or lack of oil surge on teh main crank

Beacuse of the layout of the engine an dthe oil feed only being 1 way on a right hander if you dont look after yur oil etc it can mean that engine oil does not go to all points of the crank and the shells say bye bye if this is repeated alot.

The circumstances have to be just right or wrong for the above to happen but it can happen

overall tho the noise is wonderful and if teh induction and exhaust is sorted correctly there is no need for a music system as the noise form the engine in front of you and teh exhausts behind you just bring a smile to your face