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Model specific boards => Golf mk5 => Topic started by: _Adam_ on 10 June 2011, 12:32

Title: Big Bore Downpipe
Post by: _Adam_ on 10 June 2011, 12:32
after talking to Rhyso, instead of getting a full exhaust system before a remap i think i'll just go for an upgraded downpipe.

does anyone know if i can have a de-cat pipe and still pass an MOT?

what price should i looking to pay for a downpipe and also a decat pipe?

Cheers
Title: Re: Big Bore Downpipe
Post by: bacillus on 10 June 2011, 15:06
Decat = mot failure
Title: Re: Big Bore Downpipe
Post by: Komenda on 10 June 2011, 15:31

As said decat will = MOT fail, just get a bigger bore downpipe and a less restrictive cat.
Title: Re: Big Bore Downpipe
Post by: _Adam_ on 10 June 2011, 15:35
ok thanks guys

i was going on this info (but it's 3 years old :undecided:)

Quote
Sun, Dec 7 2008 12:49 PM    Re: Milltek just large down pipe or full system ? GT TDI 140
Yohan
Quote Reply Contact
   
I believe the downpipe would normally attach to the cat, but in place of the cat is just a straight-through pipe (decat pipe). You do not require a cat on diesels to pass an MOT.
Title: Re: Big Bore Downpipe
Post by: Komenda on 10 June 2011, 15:46

Yeah, thats nonsense.

If a cat was fitted when the car was manufactured then you need it to pass an MOT. Unless through some witchcraft they were able to reduce the emissions to a pass level without one.
Title: Re: Big Bore Downpipe
Post by: Hurdy on 10 June 2011, 17:29
a 100cell cat would do the trick.

Some people buy dummy cats off the bay, which look like a cat but are empty inside. It is then down to emissions whether it would pass the test and some actually do!!
Title: Re: Big Bore Downpipe
Post by: Rhyso on 12 June 2011, 14:30
Lol - Adam drives a DIESEL  :tongue:

no cat's needed for diesels; pay attention kids  :wink:
Title: Re: Big Bore Downpipe
Post by: _Adam_ on 13 June 2011, 09:11
Lol - Adam drives a DIESEL  :tongue:

no cat's needed for diesels; pay attention kids  :wink:


 :grin: :grin: cheers Rhyso
Title: Re: Big Bore Downpipe
Post by: four! on 18 June 2011, 09:25
Thinking of this on mine also, so far I've come across 2 off the shelf choices. Milltek and THS

The milltek is more expensive and the end is left at 63.5mm which won't fit your oe cat back. They want you to buy their complete system

The THS comes with adaptors to fit your oe cat back or another brand 63.5 system

The oe cat back systems o/d on mine is 55mm

You can get a reducer made to fit the milltek but that adds even more expense. Think i'm gonna try the THS, If I can find one  :rolleyes:

Good luck

Title: Re: Big Bore Downpipe
Post by: Hurdy on 18 June 2011, 09:57
Lol - Adam drives a DIESEL  :tongue:

no cat's needed for diesels; pay attention kids  :wink:

 :embarassed: :laugh:

Never noticed the car drank from the darkside Rhyso :grin:
Title: Re: Big Bore Downpipe
Post by: maxitrol on 18 June 2011, 10:12
i have the full milltek on mine(gttdi 140) and the sound is amazing click on my build thread
Title: Re: Big Bore Downpipe
Post by: _Adam_ on 19 June 2011, 04:25
I have found a company that can do a custom one for 145 fitted, including de-cat  :smiley:
Title: Re: Big Bore Downpipe
Post by: Rhyso on 19 June 2011, 10:08
I have found a company that can do a custom one for 145 fitted, including de-cat  :smiley:

a full turbo back exhaust for £145  :huh:  I'd be doubting the quality of that.......

Otherwise if its £145 for just the decat then it sounds about right

What company are you using?
Title: Re: Big Bore Downpipe
Post by: _Adam_ on 20 June 2011, 10:41
I have found a company that can do a custom one for 145 fitted, including de-cat  :smiley:

a full turbo back exhaust for £145  :huh:  I'd be doubting the quality of that.......

Otherwise if its £145 for just the decat then it sounds about right

What company are you using?

no it's just the decat downpipe lol
Title: Re: Big Bore Downpipe
Post by: Rhyso on 20 June 2011, 10:43
I have found a company that can do a custom one for 145 fitted, including de-cat  :smiley:

a full turbo back exhaust for £145  :huh:  I'd be doubting the quality of that.......

Otherwise if its £145 for just the decat then it sounds about right

What company are you using?

no it's just the decat downpipe lol

Sounds alright; give Pro Speed a ring though; quality of my exhaust was second to none  :cool: