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[jomega 1]

Hi all
Just had a holed piston on my 2.5v6 replaced and also had 2 new cats fitted complete with sensor.  My problem is, it is now a lot more noisy and has lost some of the grunt it had (before holed piston came about).
Some of the noise was the vacuum pipe from the rear of the engine to possibly the engine management system, which had not been reconnected, and even after refitting it has not cured the whole problem and i am wondering if there may be another pipe somewhere that hasn't been put back either.
It runs okay at motorway speed but has a throaty rumble during acceleration.  The garage has told me they have done an oxygen check and everything is okay there.

[denisaok]

were they gen vx cats or aftermarket as i have found atermarket cats do sound more noisy

[Darth Loo-knee]

Have you tightened the EGR pipe as I remember it makes hell of a noisy if it isn't..

[Albatross]

were they gen vx cats or aftermarket as i have found atermarket cats do sound more noisy

'Tick in the box' as I'd like to know about CATs