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Posted

The exhaust must emit noise to the same level as a standard system on same model. So how does this work with a car which has a prodrive kit which includes a louder none standard exshaust from the origanal model?Should they all fail as they are not at the same level as the stanard exshaust?

Posted (edited)

First off I'm not really ranting about my mot station just a bit peeved it has passed there in the same guise two years running with no cat I'm not bothered about having to buy a new back box cause I wanted one anyway but this is a good way of getting by the wife!

But at the end of the day I thought a cat Was for emissions not noise reduction!

Neil

Edited by neill54
Posted

neil the cat pipe is yours m8 to keep free of charge if you need it i dont require it anymore because i bought a bugey sti 2 weeks ago just give me a bell ;)

Posted

I have a standard catted downpipe if its any use to you?? Will be sure to get you through the emmissions.

As for MOT's i had to change the cat every time to pass the emissions! Its just one of these things that you need to do. My old Evo failed its MOT with the exhaust being too loud. Thats all down to the discression of the MOT tester as my arguement was, would you fail a standard TVR for being too loud.

Posted
The exhaust must emit noise to the same level as a standard system on same model. So how does this work with a car which has a prodrive kit which includes a louder none standard exshaust from the origanal model?Should they all fail as they are not at the same level as the stanard exshaust?

Not at work so can't check the wording, the noise level we check is between 2500-3000 when doing the emissions test. I think it says clearly different from a standard system on equivalent model. That means a PPP would pass as it's not clearly different. A totally decatted system with one silencer is clearly different. I know, I have one!

Cat needs to go back on for test, then off it comes, then back on when you fail a roadside check and back off again after you've had it cleared. Best to fit it with wing nuts ;)

Posted

judge for yourselfs guys

right let me try and understand this my cars emissions are too high which i reckon if i do the over due service bit of additive it will go through but this with the cat, on my failure sheet it doesnt say anything about the cat just exhaust being to loud so if i fit a nice new quieter back box im on to a winner??

neil

ps the problem really have is the wee guy who usually does my mot was not there and the boss done it!

Posted

jesus my 3 inch apexi exhaust is much louder than that, old dear can hear my coming to her bit and she's on the forth floor in mini highflats

thats quiet mate in my opinion

i have never had an exhaust knocked back for mot, even on the track car which hits 114 decibells at 2/3 throttle static test

Posted

You'll need the cat to get the emissions down, it won't come down by servicing or additive, presence of a cat is not a test requirement, emissions levels are. A cat may quiten it enough to get through that part. Remember you can appeal the decision re the noise but it'll cost you and you're likely to lose if it's not standard cause that's the basic requirement.

Posted

Badbaz, I also work in a MOT station (my father's) an couldn't agree more with what you say. Bitching about a set of MOT standards that we have to adhere to boys is not our fault, we are just trying to make a living - it's very simple - make sure the car is legal at time of test!

Diesel Hands, I think your MOT testing scenario is a little different to Neil54's !!

Posted

judge for yourselfs guys

right let me try and understand this my cars emissions are too high which i reckon if i do the over due service bit of additive it will go through but this with the cat, on my failure sheet it doesnt say anything about the cat just exhaust being to loud so if i fit a nice new quieter back box im on to a winner??

neil

ps the problem really have is the wee guy who usually does my mot was not there and the boss done it!

Neil, youve got a 93 wrx yeh (or there abouts)...you dont need a cat ...imports car upto, am sure its 1996 dont need them ;)

Posted

im sure someone can verify that one jodie thats always been a grey area!!

and joe and scobzie ill drop you both a p m as regards to the cats im going to let it go through first and see what happens just waiting on my new exhaust to come

gid!!

neil

Posted
Neil, youve got a 93 wrx yeh (or there abouts)...you dont need a cat ...imports car upto, am sure its 1996 dont need them ;)

Wrong, the MOT rules to eradicate this loophole were changed about 2 yeras ago. All cars after August 1992 require a cat test except for a very small minority such as kitcars.

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