Diesel exhaust back box on a petrol car.

rubble2

Hi,
I have a Saab 9-3 with a 2.0 petrol engine, I have been looking round for a replacement back box which has twin tailpipes which exit the box through a cutout in the bumper ( the existing backbox has twin exit pipes which bend down to the road).
I have come across one which is a Saab original part but it is designed for the diesel engine, the physical size and fixings are identical so it will be a direct fit but I wonder what (if anything) would be the problems encountered in using a diesel backbox on a petrol engine? I wasn't aware that there was likely to be any difference between the two.

Thanks

Joe_Horner

The diesel will have slightly different sound-deadening properties, so you may get the odd resonance at some engine speeds, and (probably) be designed to flow a little more because diesels are always pumping their maximum volume of air.

It should work just fine

rubble2

Thanks for the reply,

You don't foresee any problems come MOT time?

gilbert_and_sullivan

It might be slightly different note but it isn't going to be a straight through like an old Peco, if it fits securely with no leaks i'd bung one on without a moments hesitation.

Iceweasel

Definitely no problems at all - especially for the MOT.

Even if the entry pipe to the box was a different diameter that can be sleeved to fit.

Geodark

Iceweasel wrote: »

Definitely no problems at all - especially for the MOT.

Even if the entry pipe to the box was a different diameter that can be sleeved to fit.

Could this not be classed as a notifiable modification as far as the insurance companies go? Since the replacement part isn't standard for the car?