MK5 Golf GTI

All Things Mk5 => Modifications & Technical Area => Performance Modifications => Topic started by: Llew on May 25, 2012, 05:15:56 am

Title: Decat
Post by: Llew on May 25, 2012, 05:15:56 am

Without any other mods-- what does a decat do --also does insurance company have to be notified

Title: Re: Decat
Post by: Llew on May 25, 2012, 06:59:55 am

I am guessing it doesn't do much ????

Title: Re: Decat
Post by: ktlstar on May 25, 2012, 07:06:59 am

Noise and maybe a few hp but nothing to go telling your friends about.


If you was going for the full works then yeah do it.

Title: Re: Decat
Post by: rich83 on May 25, 2012, 08:14:30 am

Decat will give you significant gains when coupled with the correct map.

I'm not sure what car you have but if you get a decat you can run stage 2 software.

So... If you went stage 2 with a decat....

GTI ~260-270bhp
ED30 ~ 300-320bhp

Title: Re: Decat
Post by: bacillus on May 25, 2012, 08:33:50 am

Also be aware that you more than likely fail your MOT with a decat. 

Title: Re: Decat
Post by: E30Dom on May 25, 2012, 09:07:06 am

And yes you would have to notify you insurance company... :happy2:

Title: Re: Decat
Post by: Llew on May 25, 2012, 10:10:28 am

I will go for the full works but I budgeted to only spend about 300/month on upgrading so was hoping to do it bit by bit  would it be better for me to get a sports  cat down pipe first or a stage one remap ---by the way I have a vw golf 140 tdi 2006

Title: Re: Decat
Post by: 56OctyVRS on May 25, 2012, 11:20:47 am

If you are diesel you can fit a decat as they only do smoke tests on the MOT. 

Title: Re: Decat
Post by: Llew on May 25, 2012, 12:38:17 pm

Which should I do first exhaust or remap?

Title: Re: Decat
Post by: 56OctyVRS on May 25, 2012, 12:50:32 pm

Exhaust then remap. Else you will pay for the remap then pay again to get the map altered to take into account the exhaust.

Title: Re: Decat
Post by: Llew on May 25, 2012, 05:24:12 pm

Thanks for the info

Title: Re: Decat
Post by: Shorty on May 25, 2012, 07:09:14 pm

The cat is the most restrictive part of your exhaust, you will get decent gains off removing it and a map. :)

I dont get the way people fit just a cat back system, bit pointless when all the restrictive'ness is in the downpipe.

Title: Re: Decat
Post by: Tamiyoman on May 25, 2012, 08:24:29 pm

Quote from: Shorty on May 25, 2012, 07:09:14 pm

The cat is the most restrictive part of your exhaust, you will get decent gains off removing it and a map. :)

I dont get the way people fit just a cat back system, bit pointless when all the restrictive'ness is in the downpipe.

Agree 100%, its either Full TBE with Race CAT or dont bother  :happy2:

Title: Re: Decat
Post by: Llew on May 27, 2012, 08:47:01 pm

I hear that ---thanks