Notices
Drivetrain Gearbox, Diffs & Driveshafts etc

decat downpipe or decat centre

Thread Tools
 
Search this Thread
 
Old 05 July 2006, 06:57 PM
  #1  
bob r
Scooby Regular
Thread Starter
iTrader: (46)
 
bob r's Avatar
 
Join Date: Nov 2005
Location: Probably polishing it.Lol
Posts: 5,381
Likes: 0
Received 0 Likes on 0 Posts
Default decat downpipe or decat centre

ive had a thought

if i was to fit a decat downpipe to my stainless system with oe centre cat would this pass the mot. (newage sti)

i could then in theory fit a decat centre pipe (simple job) for track days etc

i suspect this may be an obvious question to some.
Old 05 July 2006, 07:43 PM
  #2  
Trap2Terrorist
Scooby Regular
iTrader: (3)
 
Trap2Terrorist's Avatar
 
Join Date: Jun 2005
Location: Surrounded by sheep, tidy.
Posts: 3,294
Likes: 0
Received 0 Likes on 0 Posts
Default

There's a post from a guy in the technical section who has a decat downpipe and cat cente pipe and has just failed his MOT emissions.
Old 05 July 2006, 10:12 PM
  #3  
GC8
Scooby Regular
 
GC8's Avatar
 
Join Date: Aug 2003
Location: Sheffield; Rome of the North
Posts: 17,582
Likes: 0
Received 0 Likes on 0 Posts
Default

I think that temperature is critical; it will need to be really hot. You could ditch them all and fit a used STI 03 onwards Prodrive sports cat; the earlier ones were lagged and not very good (lagged to keep the heat in I think; as they werent efficient).

Simon
Old 05 July 2006, 10:15 PM
  #4  
bob r
Scooby Regular
Thread Starter
iTrader: (46)
 
bob r's Avatar
 
Join Date: Nov 2005
Location: Probably polishing it.Lol
Posts: 5,381
Likes: 0
Received 0 Likes on 0 Posts
Default

Originally Posted by GC8
I think that temperature is critical; it will need to be really hot. You could ditch them all and fit a used STI 03 onwards Prodrive sports cat; the earlier ones were lagged and not very good (lagged to keep the heat in I think; as they werent efficient).

Simon
with regards to the ppp cat ideal if i had the dosh. i was thinking of a cheaper alternative.
Old 05 July 2006, 10:20 PM
  #5  
Ayde
Scooby Regular
iTrader: (6)
 
Ayde's Avatar
 
Join Date: Oct 2002
Location: North West
Posts: 1,134
Likes: 0
Received 0 Likes on 0 Posts
Default

My classic had no probs on the MOT with just the centre CAT Just get it nice and hot first.
Old 05 July 2006, 10:23 PM
  #6  
SamUK
Scooby Senior
iTrader: (1)
 
SamUK's Avatar
 
Join Date: Jan 2004
Location: London
Posts: 6,507
Received 1 Like on 1 Post
Default

Originally Posted by bob r
ive had a thought

if i was to fit a decat downpipe to my stainless system with oe centre cat would this pass the mot. (newage sti)

i could then in theory fit a decat centre pipe (simple job) for track days etc

i suspect this may be an obvious question to some.
Bob,

Go for the ThunderCat Sports cat.....this will also replace the second CAT pipe and join the centre section....little more money but i think will be worth it...
Old 05 July 2006, 10:24 PM
  #7  
bob r
Scooby Regular
Thread Starter
iTrader: (46)
 
bob r's Avatar
 
Join Date: Nov 2005
Location: Probably polishing it.Lol
Posts: 5,381
Likes: 0
Received 0 Likes on 0 Posts
Default

cheers sam

Trending Topics

Old 05 July 2006, 10:30 PM
  #8  
GC8
Scooby Regular
 
GC8's Avatar
 
Join Date: Aug 2003
Location: Sheffield; Rome of the North
Posts: 17,582
Likes: 0
Received 0 Likes on 0 Posts
Default

Originally Posted by bob r
with regards to the ppp cat ideal if i had the dosh. i was thinking of a cheaper alternative.
£100 used.....
Old 05 July 2006, 10:38 PM
  #9  
SamUK
Scooby Senior
iTrader: (1)
 
SamUK's Avatar
 
Join Date: Jan 2004
Location: London
Posts: 6,507
Received 1 Like on 1 Post
Default

Well...i costed in my tunning thread:

£400 for the downpipe (new)
£50 for the centre section (second hand)
£150 for the prodrive backbox (second hand)

afew other bits like the fuel pump and airfilter...and then a final Map from Paul @ Zen (who also maps for TSL)...and bingo...you have the TSL 333 Package...just allot cheaper...
Old 06 July 2006, 12:35 AM
  #10  
StiX
Scooby Regular
Support Scoobynet!
iTrader: (4)
 
StiX's Avatar
 
Join Date: Jan 2004
Location: Bridgend, S Wales
Posts: 2,293
Likes: 0
Received 0 Likes on 0 Posts
Default

On my old MY95 WRX, it failed MOT with just the centre cat.

On my MY00 UK Turbo, passed easily with Ninja Sports Cat dpipe and no centre cat.
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
fatboy_coach
General Technical
15
18 June 2016 03:48 PM
Mattybr5@MB Developments
Full Cars Breaking For Spares
28
28 December 2015 11:07 PM
Mattybr5@MB Developments
Full Cars Breaking For Spares
12
18 November 2015 07:03 AM
Tarling
Subaru Parts
10
19 October 2015 07:58 PM
sedge69
Wanted
0
01 October 2015 09:44 PM



Quick Reply: decat downpipe or decat centre



All times are GMT +1. The time now is 05:16 AM.