421 manifold for mk2 and decat

1. user_38956 Frequent Poster Joined: Nov 2009 Bristol Posts: 557 Saxo VTR Mk2 Vauxhall Corsa B Sport

   #1 26th April 2010, 21:29

   hey, i have a mk2 im looking to get a 421 manifold with a decat in it,
   
   but obv it wont pass mot so i was thinkin instead of riskin keep changin manifold for mot, can i not put a mk1 exhasut system on it and have the cat underneath??
   
   wil this work??
   
   thanks
2. jstroudy Regular Poster Joined: Mar 2010 huddersfield Posts: 349 saxo vtr

   #2 26th April 2010, 22:45

   i wouldn't of throught so with it having 2 lambra sensors??????? aint 100% tho
   and it depends who you take the car to for a mot test as some will just let you of and put emissions onto a different car due to the de cat.
3. KamRacing Saxperience Addict Joined: Nov 2006 A farm shed in Aylesbury Posts: 14916 Corolla AE86 Peugeot 205 B18C (in bits)

   #3 27th April 2010, 08:19

   Quote:

   Originally Posted by Steve46 hey, i have a mk2 im looking to get a 421 manifold with a decat in it, but obv it wont pass mot so i was thinkin instead of riskin keep changin manifold for mot, can i not put a mk1 exhasut system on it and have the cat underneath?? wil this work?? thanks

   it will indeed work ..
   
   the 2nd lambda should be in a sleeve anyway so that won't be an issue
4. user_38956 Frequent Poster Joined: Nov 2009 Bristol Posts: 557 Saxo VTR Mk2 Vauxhall Corsa B Sport

   #4 27th April 2010, 16:49

   Quote:

   Originally Posted by jstroudy i wouldn't of throught so with it having 2 lambra sensors??????? aint 100% tho and it depends who you take the car to for a mot test as some will just let you of and put emissions onto a different car due to the de cat.

   Ah well i dont know anybody that would do that unfortunatly
   
   
   

   Quote:

   Originally Posted by KamRacing it will indeed work .. the 2nd lambda should be in a sleeve anyway so that won't be an issue

   
   ah good thanks very much
5. user_38956 Frequent Poster Joined: Nov 2009 Bristol Posts: 557 Saxo VTR Mk2 Vauxhall Corsa B Sport

   #5 27th April 2010, 19:36

   So would i just need to buy a mk2 421 with decat like normal, and keep my mk2 centrepipe and backbox then for the mot just fit a m1 centre section with cat
   
   or would i need to buy a mk1 421 manifold and keep my mk2 centrepipe and backbox and then put the mk1 cat on for mot
   
   orr lmao would i need to buy a mk1 full exhasut system, with a 421 and then get a cat for the mot
6. user_38956 Frequent Poster Joined: Nov 2009 Bristol Posts: 557 Saxo VTR Mk2 Vauxhall Corsa B Sport

   #6 27th April 2010, 19:42

   looking to get it a bit louder so quiet atm and i want a decat but dont fancy keep chaging a manifold for mot
7. user_38956 Frequent Poster Joined: Nov 2009 Bristol Posts: 557 Saxo VTR Mk2 Vauxhall Corsa B Sport

   #7 28th April 2010, 21:28

   anybody??
8. VTR_Craig Saxperience Forum Bum Joined: Apr 2007 Lincoln/Newark Posts: 2673 Mercedes C220, Scooby, Saxo VTS

   #8 28th April 2010, 21:33

   I have a miltek 4-1 manifold with sports cat
9. user_38956 Frequent Poster Joined: Nov 2009 Bristol Posts: 557 Saxo VTR Mk2 Vauxhall Corsa B Sport

   #9 28th April 2010, 21:34

   Cool