11 replies to this topic

[hardy1812]

Morning peeps,,, has anyone fitted a decat to their TDCi???
How easy is it??
Any special tools..like long extension bars/deep sockets big hammers etc
Can this be done off car ramps???
Anything need removing to gain access to any bolts etc???

And is it actually worth removing???

Thanks peeps

[raynkar]

First point, and in my opinion, no it's not worth removing at all and is an anti social thing to do.

Removing it will make the car pollute more but won't add any meaningful or noticeable gains. I do see many people saying it makes the car far more responsive etc, but I think the only gain is a placebo effect.

It's also worth noting that a visible decat is a reason for MOT failure.
The above said, you will only need sockets and extensions to remove a decat, but may need star bit sockets depending on what fixings you have on your car. The lower fixings seem to often be the hardest to remove/seized but are the easiest to get to.
This can be done with the front up on ramps or axle stands.

[turbopete1]

agreed. removing the cat (ive done it in the past on petrol AND diesel cars) only makes a difference at the very top of the rev band, on an otherwise standard car. if you have spent a fortune on big turbos, injectors, intercoolers and fancy exhaust, removing (or better yet a free flowing and legal) cats MIGHT help but again, more of a benefit at high rpms.

[hardy1812]

Cheers peeps,,, guess that answers me questions then 😂😂..... I’ll give it a miss and leave cat alone and think of something else to spend me pennies on

[Mondygeek]

So lots of useful info above and all points are valid. I will say I've gone through 3 mots now with my decat and straight through twin exhaust. Before fitting the straight through exhaust I just simply fitted a decat to a standard exhaust and there was absolutely no difference in sound or "performance". It's your motor to do what you want with so I'd say go for it if that's what you want. Easy to fit from ramps. 8 bolts in total, you'll need some exhaust paste too

[hardy1812]

So lots of useful info above and all points are valid. I will say I've gone through 3 mots now with my decat and straight through twin exhaust. Before fitting the straight through exhaust I just simply fitted a decat to a standard exhaust and there was absolutely no difference in sound or "performance". It's your motor to do what you want with so I'd say go for it if that's what you want. Easy to fit from ramps. 8 bolts in total, you'll need some exhaust paste too

Your twin exhaust on a TDCi????
Which one did you get or is it a custom one mate. Would really like a twin exit on mine but don’t know if there is one that’ll fit (220 maybe)

[Mondygeek]

It's a custom stainless twin exhaust. It was custom made from the turbo back and comes in 2 parts so the decat is part of the flexi, 3" pipe all the way through. There is a picture on here somewhere. I paid £150 for the exhaust and then scrapped my cat for £155 so it made me a fiver.

Here's a short clip of the sound


The video was taken on my old phone with poor sound quality

Edited by Mondygeek, 24 September 2019 - 04:51 PM.

[ST56]

Hi

I had a defat pipe fitted to my MK3 ST, and must say along with Bluefin it helped to bring car to life. Decat + Flexible + Full straight through exhaust all in 2.5” stainless steel.

It is always stated that fitting a Decat pipe does not give you more power but I felt turbo was spinning up faster, that would give higher boost and get you to higher revs quicker.

All the above is academic because now legally you have to have a Cat fitted if car was built with one. I can tell you that after swapping original Cat back into place before trading car it did feel a little duller.

Peter

[raynkar]

So lots of useful info above and all points are valid. I will say I've gone through 3 mots now with my decat and straight through twin exhaust. Before fitting the straight through exhaust I just simply fitted a decat to a standard exhaust and there was absolutely no difference in sound or "performance". It's your motor to do what you want with so I'd say go for it if that's what you want. Easy to fit from ramps. 8 bolts in total, you'll need some exhaust paste too

Your twin exhaust on a TDCi????
Which one did you get or is it a custom one mate. Would really like a twin exit on mine but don’t know if there is one that’ll fit (220 maybe)

The rear ends from a 3.0 V6 mondy is a straight fit to the car, and as it's a factory items it looks right too. 3.0 litre exhausts are cheaper to buy than 3.0 litre 220 exhausts.

All you would need is a second exhaust hanger and bracket. Its up to you whether you fitted a 220 rear bumper, had downward facing tail pipes or cut your current bumper

Twin pipes on a diesel.


Second hand oem exhausts can be bought very cheaply.

[Mondygeek]

So lots of useful info above and all points are valid. I will say I've gone through 3 mots now with my decat and straight through twin exhaust. Before fitting the straight through exhaust I just simply fitted a decat to a standard exhaust and there was absolutely no difference in sound or "performance". It's your motor to do what you want with so I'd say go for it if that's what you want. Easy to fit from ramps. 8 bolts in total, you'll need some exhaust paste too

Your twin exhaust on a TDCi????
Which one did you get or is it a custom one mate. Would really like a twin exit on mine but don’t know if there is one that’ll fit (220 maybe)

The rear ends from a 3.0 V6 mondy is a straight fit to the car, and as it's a factory items it looks right too. 3.0 litre exhausts are cheaper to buy than 3.0 litre 220 exhausts.

All you would need is a second exhaust hanger and bracket. Its up to you whether you fitted a 220 rear bumper, had downward facing tail pipes or cut your current bumper

Twin pipes on a diesel.
F7F4072A-13A0-4AEB-9C52-6A5F13DE7643.jpeg

Second hand oem exhausts can be bought very cheaply.

I've been looking around for 1128572 (the bolt on hanger found on the 220) I've browsed the web and can't seem to find any! Any chance you know where I could source one?