MK5 Golf GTI

All Things Mk5 => Mk5 General Area => Topic started by: johnhol78 on April 27, 2011, 05:27:44 pm

Title: Please be kind....exhaust question
Post by: johnhol78 on April 27, 2011, 05:27:44 pm: Right the picture below is from the miltek website

Is the blue circle where the pre cat sits and the red the main cat?

Thinking about removing the pre cat as some have done here and possibly fitting a switchable pipe to replace the main cat...pre cat first probably...

Are my guesses correct?

(https://www.mk5golfgti.co.uk/forum/proxy.php?request=http%3A%2F%2Fi46.photobucket.com%2Falbums%2Ff150%2Fjohnhol%2Fexhaust1.jpg&hash=6af94af7a1678896817eeffd90a776845bd7c164)

Thanks
Title: Re: Please be kind....exhaust question
Post by: alexperkins on April 27, 2011, 05:29:05 pm: What picture john :stupid:

The precat is directly after the join at the manifold end, the main cat is further down the pipe

Thats what some people have done yes
Title: Re: Please be kind....exhaust question
Post by: johnhol78 on April 27, 2011, 05:30:39 pm: Quote from: alexperkins on April 27, 2011, 05:29:05 pm
What picture john :stupid:

The precat is directly after the join at the manifold end, the main cat is further down the pipe

Thats what some people have done yes

The one in the first post :ashamed:
Title: Re: Please be kind....exhaust question
Post by: alexperkins on April 27, 2011, 05:32:49 pm: :congrats: yes you are correct
Title: Re: Please be kind....exhaust question
Post by: QD MBE on April 27, 2011, 06:06:55 pm: Pre-cat?

My Ed30 had no such thing. Just the main cat.
Title: Re: Please be kind....exhaust question
Post by: Hedge on April 27, 2011, 06:18:34 pm: They all do QD it's the gauze/mesh just inside the opening.
Title: Re: Please be kind....exhaust question
Post by: QD MBE on April 27, 2011, 06:25:17 pm: Quote from: Hedge on April 27, 2011, 06:18:34 pm
They all do QD it's the gauze/mesh just inside the opening.

Guess mine must have been missing, because i remember cleaning the insides out when sorting out an exhaust leak.

Guess some did and some didn't.
Title: Re: Please be kind....exhaust question
Post by: johnhol78 on April 27, 2011, 06:26:19 pm: Quote from: Hedge on April 27, 2011, 06:18:34 pm
They all do QD it's the gauze/mesh just inside the opening.

Exactly....it;s a ceramic lump that supposedly comes out with a hammer and chisel :evilgrin:

Also ask a local exhaust specialist about making a switchable main cat/decat pipe...

Hopefully get a quote in a day or two.

This is next stage ona slippery slope.....Map is running great, MPG is great.....just need to track down the loss of power in 4th...only happens in 4th and happened 3 times in 4 weeks...........intermittent issues are a pain in the ass.... :sad1:
Title: Re: Please be kind....exhaust question
Post by: Hedge on April 27, 2011, 06:38:53 pm: Quote from: QD on April 27, 2011, 06:25:17 pm
Quote from: Hedge on April 27, 2011, 06:18:34 pm
They all do QD it's the gauze/mesh just inside the opening.

Guess mine must have been missing, because i remember cleaning the insides out when sorting out an exhaust leak.

Guess some did and some didn't.

It's 'cos you're special mate. :wink: