De cat vs Sports cat

Any form of normally aspirated power mods.
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simonweb
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De cat vs Sports cat

Post by simonweb » Mon Dec 23, 2019 8:33 pm

I'm intrigued that a silenced decat (https://theperformanceshop.co.uk/collec ... ort-models) from TPS is £470, while a 'hi-flow' sports cat (https://theperformanceshop.co.uk/collec ... -convertor) is £250.

My thoughts are that a silenced decat should be ideal for 364 days of the year, will reduce risk of damage and allow a richer fuel mix whilst not being too obnoxious for motorway hauls. But if a sports cat is half the price is that the best option? My cat has <40k miles on it and seems fine but is a cause of anxiety!

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Re: De cat vs Sports cat

Post by New Duke » Mon Dec 23, 2019 8:45 pm

There's no guarantee that sports cat will pass an MOT unless I missed that on their website, so in that case:

The high flow cat will be better option if you don't like the smell of a decat.

On every other case the decat will be better.

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Re: De cat vs Sports cat

Post by warpc0il » Mon Dec 23, 2019 9:04 pm

Apart from decats being illegal on UK roads.

You risk being pulled on a VOSA roadside check and your insurance is also invalid.

You could try declaring it as a mod but no company can insure an illegal vehicle, or you don't declare and it's an undeclared mod.

Since when did ins cos need an excuse not to pay out?

VOSA and the police are also aware of this implication and drivers no longer just get issued with a rectify notice.

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Re: De cat vs Sports cat

Post by simonweb » Mon Dec 23, 2019 9:30 pm

Has anyone here had a VOSA roadside check? Never heard of it happening.

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Re: De cat vs Sports cat

Post by qwakers » Mon Dec 23, 2019 9:37 pm

about 4 times over the years. but always in a commercial vehicle of one type or another.

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Re: De cat vs Sports cat

Post by simonweb » Mon Dec 23, 2019 9:39 pm

From the website
> Sports Cat will pass MOT emissions tests

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Re: De cat vs Sports cat

Post by New Duke » Mon Dec 23, 2019 9:45 pm

Ah good they guarantee that. Well there's your choice then. Just depends what your priorities are.

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Re: De cat vs Sports cat

Post by Yorindesarin » Mon Dec 23, 2019 9:48 pm

I wouldn't pay 250 quid for a "sports cat". I'd question the ability of it to withstand the heat of an 8. As well as its ability to actually pass emissions. They may say it does but I would just spend more like say 500 quid for an RRP sports cat... Which at 200cell will definitely pass and won't fail and kill your engine.
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Re: De cat vs Sports cat

Post by Ryan Rotary Performance » Tue Dec 24, 2019 1:08 pm

This thread may be of use:

viewtopic.php?f=6&t=80654

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Re: De cat vs Sports cat

Post by xamtex » Tue Dec 24, 2019 5:02 pm

simonweb wrote:
Mon Dec 23, 2019 9:30 pm
Has anyone here had a VOSA roadside check? Never heard of it happening.
cant remember if it was silverstone or donny but vosa were pulling some cars in on the way out last year.

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Re: De cat vs Sports cat

Post by chiron » Sat Jan 18, 2020 8:32 am

xamtex wrote:
Tue Dec 24, 2019 5:02 pm
simonweb wrote:
Mon Dec 23, 2019 9:30 pm
Has anyone here had a VOSA roadside check? Never heard of it happening.
cant remember if it was silverstone or donny but vosa were pulling some cars in on the way out last year.
Police regularly do stings around Silverstone. I got pulled in an untaxed campervan about 2 years ago. Completely forgot to tax the bloody thing. Cost me about £600 in fines.
The thing was that Waze had shown them up from about 20 miles out. I drove straight into the trap thinking nothing was wrong with the van!

There were a lot of Ford guys getting tugged for number plates and mods too. Police had covered all the detour routes too. As soon as you tried to detour around the anpr zone, they would have caught you on the back roads.

City of London regularly do spot checks and stings too.
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Re: De cat vs Sports cat

Post by WildMan10 » Sat Jan 18, 2020 8:59 am

As an aside, what noise difference is there between a 'silenced' decat, sports cat and a ghetto decat?

My first R3 came with an AEM air intake, Racing Beat Dual Resonated Decat and Racing Beat Revi exhaust. The interactions between them gave several drones between 65-80 that became annoying fairly quickly.
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Now back to one, a white R3. Gone but not forgotten: 04 Tit Grey 231, 06 Copper Red Evolve (231), 09 VR R3, 10 Aurora Blue R3, 06 Black PZ; RX87 13BREW project car ;-( ; 04 White with Greddy turbo conversion ;-(

Buying a used RX8 turbo is like marrying a stripper.
Beware - older people may be cr@p drivers but they can afford better lawyers

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