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Tommo
10-05-2005, 12:26
What does this involve and what sort of cost would I be looking at to do it? My car went in for a service at the w'end and the guy said it was the catalyst making the rattling at tick-over, he said it would be better to de-cat it as you'd get more power and put the cat back on for MOT's (providing it still works!) Any advice would be appreciated

Cheers
Col

GazTwo
10-05-2005, 12:37
I put one on mine Col when I got the exhaust done, is just a straight peice of pipe to replace the CAT, I can't tell if it's made any difference but if your CAT's nackered u might aswell put one on and save it for MOT's.

I got a second hand de-cat for £30 but I think BB do one for around £50....4 bolts and it's done.

big hp
10-05-2005, 12:42
Easy enough job, 4 bolts and its done. I never really noticed much in the way of a power increase. Main difference was exhaust note, just a bit louder.

Rudders16v
10-05-2005, 13:07
Are the silenced de-cats any good? Or does the fact that its got a silencer in it defeat the object? I'd like a de-cat for mine, but the exhaust is already a bit louder than i would really like

Jan
10-05-2005, 13:11
i've got a silenced magnex one, much better than the k-tec one IMO, and it has made no difference to the exhaust loudness

Rudders16v
10-05-2005, 13:20
Did you notice an improvement with the power then? As i've got my Williams registered/insured under my girlf's mum, mods have to be discreet!

Jan
10-05-2005, 13:40
yeap, can definitely notice a power gain. was 3 up on sunday and the car felt like it was pulling with just me in! 8)

Tommo
10-05-2005, 13:47
Cheers Gaz

Does it matter that I've got a devil cup system, would I have to order a straight piece from them?? I'm gonna get the emissions checked and if the cat still works I'll put in a straight piece otherwise might as well buy a new cat, £50 sounds cheap I've heard they can be expensive £150+

Col

Jan
10-05-2005, 13:59
A new cat from renault is very expensive, something like £400, but a de-cat is just a straight pipe. A silenced one is a bit more expensive 70-100, but the only decent silenced one i've seen is the magnex

Rudders16v
10-05-2005, 14:16
Where did you get the magnex one from?

Jan
10-05-2005, 14:21
i got it off speiro on CS

Rudders16v
10-05-2005, 14:23
Secondhand? Or does he sell them?

northy
10-05-2005, 14:25
a straight through decat is all that you need....and they release a good 3bhp.

Jan
10-05-2005, 14:37
Secondhand? Or does he sell them?

Was lucky - he was just selling one second hand... lunner sells the straight through ones quite cheap though

northy
10-05-2005, 14:55
lunners are mild steel though....not knocking them but you can get a stainless steel one for £40.

Or do to a custom exhaust place and they will be even cheaper.

GazTwo
10-05-2005, 15:03
Does it matter that I've got a devil cup system, would I have to order a straight piece from them?? Col

No mate, any decat will fit.

2 live
10-05-2005, 15:10
any will fit mate..but if u go to the trouble of sourcing a zorst....only seems right that u go with a devil de-cat too...

true they are only steel.but 3 years on mine an its still as new

Mark_Ritchspeed
10-05-2005, 18:14
My exhausts never last long enough to go rusty anyway. End up ripping the things off or breaking the welds and you can only repair them so many times. I normally manage to scrape about 2 years out of an exhaust, with the odd repair here and there.