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[pirate]

prob been asked before but im changing the exhaust on the steinmetz having one built from cats back but im thinking these pre face lifts can run without cats ?its a 2.5 at the moment but in the winter a 3.2 modified with a blower is going in so will have better manifolds etc and was thinking of having removable sections so i could put in for mot then take out .not worried re sensors on 3.2 as it will have completly different managment on it.

[waspy]

I think any car registered after 1993/4 has to have a cat unless it a diesel. Don't qoute me on the year It is around that time though

[blackviper90210]

I think some have cut open the cats and gutted them, then resealed them. So when an inspection is carried out, it has the "cats" fitted 

[Manual Elite V6]

New MOT rules brought in from April state that if a cat is fitted as standard it has to be present at MOT time, even on a diesel.

[tgm147]

New MOT rules brought in from April state that if a cat is fitted as standard it has to be present at MOT time, even on a diesel.

Not correct. That rule applies to all cars given a full emissions test. A diesel ISN'T given a full emissions test so it will still pass with no cat.

[pirate]

missed the point guys ,will fit removable cats for mot,its the running without will it thow up fault codes on the prefacelift v6 2.5

[tgm147]

If there's a lambda sensor after the cats then yes it'll bring the emissions light on. Why not go for high flow sports cats instead? 100 or 200 cell ones should keep the lambdas happy enough.

[adey2]

mot tester was saying to me that due to car being on lpg it dont need a cat

[pirate]

sport cats bit pricey, re lambos they are well before cats in down pipes.

[tgm147]

sport cats bit pricey, re lambos they are well before cats in down pipes.

If they are before the cats and there's nothing after I can't see why you'd get the EML light on if you remove the cats then.

[tigers_gonads]

O2 sensors are before the cat's on a 2.5 / 3.0 so no problem.

Iirc, the v6's work better with a little back preasure so either leave along and spend your money on fitting a couple of 2.6 /3.2 manifolds  (which breath alot better) or if you have the money, a couple of sports cat's (with 2.6 /  3.2 manifolds) 

[pirate]

thanks thats the info i was after as ive had this prob before with back pressure i prob wont have the problem with a super charger pushing more through ,going for manifolds from germany on 3.2 tubler and flowed about £900 apair ouch

[zirk]

thanks thats the info i was after as ive had this prob before with back pressure i prob wont have the problem with a super charger pushing more through ,going for manifolds from germany on 3.2 tubler and flowed about £900 apair ouch

Check that they have not been designed for a LHD.