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C11BRA
Imola


Joined: 30 Mar 2015
Posts: 767
Location: North London. Herts.


PostPosted: Mon Jan 20, 2020 5:09 pm    Post subject: Decided to fit the Top Gear X pipe cats. Need to reduce DB!! Reply with quote

Edited. Chosen to fit the Top Gear X pipe. I’ll update my progress here.

My main objective is to dramatically reduce the DB level for a track day at Spa in March. And also to re-instate cat converters as it currently has none! I plan to fit X pipes to explore the sporty tone they (apparently) produce along with valved/Gundo hacked standard silencers but retain the centre exit. Valved so I can have a wife/Spa mode & a kids/Tunnel mode.




Original post.

Hello all.

After spending 3 weeks clearing out the garage, the car is now in position to have its exhaust sorted out.



I have decided that I want to go down the X pipe route, more for the sound than performance. I’ve read that it can affect the torque but tbh, I don’t thrash the car so it’s more about just having a nice drive (and sound plays a bit part in that for me).

It has Designtek headers, cat bypass pipes & silencers fitted currently. I’m looking to keep the headers and re-instate the cats with either the Designtek or Top Gear (recommended by some on here).

I have a plan for silencers but just need advice on which X pipes to choose. I don’t want to spend big money on the cats but happy to hear any advice.

Thanks in advance.



Or


_________________
2006 997.1. Project GT3C. C stands for ???
2018 Audi A4 Avant Black Edition.
Ex 996 C2 Man.
Ex Ram Cobra V8.
Ex Series 1 RS Turbo.



Last edited by C11BRA on Tue Jan 21, 2020 9:48 pm; edited 1 time in total
 
  
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Giff
Monza


Joined: 28 Apr 2013
Posts: 225



PostPosted: Mon Jan 20, 2020 6:37 pm    Post subject: Reply with quote

Will they work with your custom center exit setup?

If so the Topgear product sourced directly from manufacturer with 911UK discount would be preferable.
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villaman
Silverstone


Joined: 05 Mar 2019
Posts: 139
Location: North Staffordshire 997 C2


PostPosted: Mon Jan 20, 2020 8:16 pm    Post subject: Discount code? Reply with quote

Where does one find the discount codes as I'm also contemplating doing a exhaust upgrade soon
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C11BRA
Imola


Joined: 30 Mar 2015
Posts: 767
Location: North London. Herts.


PostPosted: Mon Jan 20, 2020 8:16 pm    Post subject: Reply with quote

Hi Giff.

I’ve been trying find as many photos as possible. As long as the lower pipes tuck nice & close to the carrier it should be ok. It’s a gamble I guess.

Top gear 1
Designtek 0
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2006 997.1. Project GT3C. C stands for ???
2018 Audi A4 Avant Black Edition.
Ex 996 C2 Man.
Ex Ram Cobra V8.
Ex Series 1 RS Turbo.

 
  
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Giff
Monza


Joined: 28 Apr 2013
Posts: 225



PostPosted: Mon Jan 20, 2020 8:22 pm    Post subject: Reply with quote

Does the private browsing suggest that you havent told your wife?
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MrC986
Trainee


Joined: 16 Oct 2017
Posts: 55
Location: Staffordshire


PostPosted: Mon Jan 20, 2020 9:43 pm    Post subject: Re: Discount code? Reply with quote

villaman wrote:
Where does one find the discount codes as I'm also contemplating doing a exhaust upgrade soon


If you send a PM to forum member Topgear Exhaust, they’ll send you the magic code for the discount! I’ve a 200 cell x-pipe on my 996 (with TG “sport sound” boxes) & I’m pleased with the quality of the parts.
 
  
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C11BRA
Imola


Joined: 30 Mar 2015
Posts: 767
Location: North London. Herts.


PostPosted: Mon Jan 20, 2020 11:02 pm    Post subject: Reply with quote

The chap at Top Gear said to simply enter 911UK in the coupon box for 10%. Is that the max discount. I’m happy with that tbh. But if a PM will be better????

Tonight’s progress.

Tea in Porsche Museum cup of course. 😜









I really don’t like the U clamps that the Top Gear cats come with. Can I use the Porsche style clamps that Designtek sell?

Private browsing. Oops.
_________________
2006 997.1. Project GT3C. C stands for ???
2018 Audi A4 Avant Black Edition.
Ex 996 C2 Man.
Ex Ram Cobra V8.
Ex Series 1 RS Turbo.

 
  
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villaman
Silverstone


Joined: 05 Mar 2019
Posts: 139
Location: North Staffordshire 997 C2


PostPosted: Tue Jan 21, 2020 7:11 am    Post subject: Reply with quote

Thanks for the steer on the codes.

I do have a question re. the X pipe.

What is the benefit of the X pipe system over a traditional cat pipe ?

I'm looking at a cat pipe with 200 cells which is the same as the X pipe I'm, so just wondered what the benefit is by comparison?
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darkhorse
Monza


Joined: 24 Feb 2019
Posts: 238
Location: under the car


PostPosted: Tue Jan 21, 2020 9:25 am    Post subject: Reply with quote

I assume you will be getting them customised to fit the centre exit bumper? I would think that will change the intended sound quite a bit..
 
  
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C11BRA
Imola


Joined: 30 Mar 2015
Posts: 767
Location: North London. Herts.


PostPosted: Tue Jan 21, 2020 10:28 am    Post subject: Reply with quote

The tailpipe section will be re-used. They are simply extensions of the standard tailpipes so shouldn’t really affect the sound.
_________________
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2018 Audi A4 Avant Black Edition.
Ex 996 C2 Man.
Ex Ram Cobra V8.
Ex Series 1 RS Turbo.

 
  
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darkhorse
Monza


Joined: 24 Feb 2019
Posts: 238
Location: under the car


PostPosted: Tue Jan 21, 2020 10:31 am    Post subject: Reply with quote

C11BRA wrote:
The tailpipe section will be re-used. They are simply extensions of the standard tailpipes so shouldn’t really affect the sound.


Ah right, I see.
 
  
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C11BRA
Imola


Joined: 30 Mar 2015
Posts: 767
Location: North London. Herts.


PostPosted: Tue Jan 21, 2020 10:38 am    Post subject: Reply with quote

villaman wrote:
Thanks for the steer on the codes.

I do have a question re. the X pipe.

What is the benefit of the X pipe system over a traditional cat pipe ?

I'm looking at a cat pipe with 200 cells which is the same as the X pipe I'm, so just wondered what the benefit is by comparison?


There is so much info on these on t’web. Lots of opinions, for and against.

The idea is to allow the exhaust gases to be scavenged to increase performance. From the factory the flat 6 only runs 3 cylinder per exhaust bank. So RH engine bank gases only exit the LH tail pipe and vice versa.

With the X pipe. All gases are mixed. This can increase torque and power at certain rev/load ranges as pulses from the exhaust (inside the X pipe) help pull gases from an opposing cylinder therefor increasing exhaust gas speed.

However, some reports say that it lowers torque at low rev ranges. It’s a very complex science tbh. But because of the mix of gases, the exhaust sounds a bit sweeter (some say). Let’s see.
_________________
2006 997.1. Project GT3C. C stands for ???
2018 Audi A4 Avant Black Edition.
Ex 996 C2 Man.
Ex Ram Cobra V8.
Ex Series 1 RS Turbo.

 
  
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Dieseldave
Trainee


Joined: 09 Jun 2019
Posts: 79
Location: Ireland


PostPosted: Tue Jan 21, 2020 10:46 am    Post subject: Reply with quote

Here is a pic of my Kline setup. I'm currently modding my system for a
GT3 bumper.

IMG_6430 by Dave Hunt, on Flickr
 
  
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C11BRA
Imola


Joined: 30 Mar 2015
Posts: 767
Location: North London. Herts.


PostPosted: Tue Jan 21, 2020 12:28 pm    Post subject: Reply with quote

Nice Dave.

Tyres look fat with the bumpers off hey?



Right. Cat ordered from Top Gear.

And gaskets + fitting kit/sleeves.

Can’t wait to play!!!!!!!!
_________________
2006 997.1. Project GT3C. C stands for ???
2018 Audi A4 Avant Black Edition.
Ex 996 C2 Man.
Ex Ram Cobra V8.
Ex Series 1 RS Turbo.

 
  
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Phil 997
Le Mans
Le Mans


Joined: 05 Dec 2015
Posts: 15796
Location: Bournemouth,Dorset

2009 Porsche 997 Carrera 4S

PostPosted: Tue Jan 21, 2020 2:56 pm    Post subject: Reply with quote

C11BRA wrote:
villaman wrote:
Thanks for the steer on the codes.

I do have a question re. the X pipe.

What is the benefit of the X pipe system over a traditional cat pipe ?

I'm looking at a cat pipe with 200 cells which is the same as the X pipe I'm, so just wondered what the benefit is by comparison?


There is so much info on these on t’web. Lots of opinions, for and against.

The idea is to allow the exhaust gases to be scavenged to increase performance. From the factory the flat 6 only runs 3 cylinder per exhaust bank. So RH engine bank gases only exit the LH tail pipe and vice versa.

With the X pipe. All gases are mixed. This can increase torque and power at certain rev/load ranges as pulses from the exhaust (inside the X pipe) help pull gases from an opposing cylinder therefor increasing exhaust gas speed.

However, some reports say that it lowers torque at low rev ranges. It’s a very complex science tbh. But because of the mix of gases, the exhaust sounds a bit sweeter (some say). Let’s see.


Thats a great explanation mate , clearly you have done your homework for anyone that wants to know more about whether the pipe or cross overs are better have a read on fabspeed and sharkwerks web pages as they both prefer opposite ones for differing reasons . My gen1 was fitted with a full topgear sports exhaust with big bore x pipe and I really liked the sound. 10% is the standard forum discount but Alex the MD does run the occasional promo offering 15% it might be worth PM ing him to see it he's got any 15% promos due .you never know it may save you another 5% Grin also if your needing fitting options are if your close to Dorset or fancy a drive you can go to their HQ in Bridport , otherwise there partner brands are powerflow exhausts and longlife exhausts there is a national network of both these fitting centres who will know and understand the systems Thumb
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NLW73
Albert Park


Joined: 27 May 2014
Posts: 1624
Location: Yateley


PostPosted: Tue Jan 21, 2020 6:11 pm    Post subject: Reply with quote

have you got ant CATs at all on your current set up as cant see any?

would quieten it down but make it slower/
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villaman
Silverstone


Joined: 05 Mar 2019
Posts: 139
Location: North Staffordshire 997 C2


PostPosted: Tue Jan 21, 2020 8:28 pm    Post subject: Reply with quote

Thanks C11BRA & Phil 997.

This sounds like the TB and Plenum upgrade is was thinking about doing on my previous 987..i brought the IPD kit but sold the car before id had chance to fit....but their were divided opinions particaly around the loss of low down torque.

Think i'm going Top Gear Valvetronic and 200 cell cats
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C11BRA
Imola


Joined: 30 Mar 2015
Posts: 767
Location: North London. Herts.


PostPosted: Tue Jan 21, 2020 9:30 pm    Post subject: Reply with quote

NLW73 wrote:
have you got ant CATs at all on your current set up as cant see any?

would quieten it down but make it slower/


No cats. It has Designtek bypass pipes & lambda extensions.

Probably why the current set up is so raw!
_________________
2006 997.1. Project GT3C. C stands for ???
2018 Audi A4 Avant Black Edition.
Ex 996 C2 Man.
Ex Ram Cobra V8.
Ex Series 1 RS Turbo.

 
  
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C11BRA
Imola


Joined: 30 Mar 2015
Posts: 767
Location: North London. Herts.


PostPosted: Tue Jan 21, 2020 9:32 pm    Post subject: Reply with quote

villaman wrote:
Thanks C11BRA & Phil 997.

This sounds like the TB and Plenum upgrade is was thinking about doing on my previous 987..i brought the IPD kit but sold the car before id had chance to fit....but their were divided opinions particaly around the loss of low down torque.

Think i'm going Top Gear Valvetronic and 200 cell cats


I already have the TB & IPD. Looks like I might get out dragged by a Montego if I’m not careful.
_________________
2006 997.1. Project GT3C. C stands for ???
2018 Audi A4 Avant Black Edition.
Ex 996 C2 Man.
Ex Ram Cobra V8.
Ex Series 1 RS Turbo.

 
  
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villaman
Silverstone


Joined: 05 Mar 2019
Posts: 139
Location: North Staffordshire 997 C2


PostPosted: Tue Jan 21, 2020 9:39 pm    Post subject: Reply with quote

C11BRA wrote:
villaman wrote:
Thanks C11BRA & Phil 997.

This sounds like the TB and Plenum upgrade is was thinking about doing on my previous 987..i brought the IPD kit but sold the car before id had chance to fit....but their were divided opinions particaly around the loss of low down torque.

Think i'm going Top Gear Valvetronic and 200 cell cats


I already have the TB & IPD. Looks like I might get out dragged by a Montego if I’m not careful.



Did you notice much difference with the power delivery with the IPD kit?
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