MK5 Golf GTI

All Things Mk5 => Modifications & Technical Area => Performance Modifications => Topic started by: E30Dom on October 05, 2011, 08:28:01 pm

Title: 3" Downpipes
Post by: E30Dom on October 05, 2011, 08:28:01 pm

Are they supposed to have two sensor holes, thought I read the rear one is coded out? Do I assume you still fit it...

There's one by the flange and one after the cat...

Cheers,

Dom

Title: Re: 3" Downpipes
Post by: Tfsi_Mike on October 05, 2011, 08:36:50 pm

I think mine was still fitted with the De - cat (couldnt have it coded out here in Germany though) Burnt my sensor out by not having it coded out I think

Perhaps its coincidence

Title: Re: 3" Downpipes
Post by: vRS_Pagey on October 05, 2011, 09:43:26 pm

All the downpipes I have seen (sport cat types anyway) have had holes for both pre and post cat O2 sensors, stage 2 software will right the rear one out of the equation.  But I have it on good authority that certain manufacturers' sport cats are so good, they won't throw up a CEL.  :innocent:

Title: Re: 3" Downpipes
Post by: Tfsi_Mike on October 05, 2011, 09:47:15 pm

Quote from: vRS_Pagey on October 05, 2011, 09:43:26 pm

All the downpipes I have seen (sport cat types anyway) have had holes for both pre and post cat O2 sensors, stage 2 software will right the rear one out of the equation.  But I have it on good authority that certain manufacturers' sport cats are so good, they won't throw up a CEL.  :innocent:

didnt get CEL with miltek sports cat but did with de - Cat

Title: Re: 3" Downpipes
Post by: vRS_Pagey on October 06, 2011, 09:04:52 am

Quote from: Tfsi_Mike on October 05, 2011, 09:47:15 pm

Quote from: vRS_Pagey on October 05, 2011, 09:43:26 pm

All the downpipes I have seen (sport cat types anyway) have had holes for both pre and post cat O2 sensors, stage 2 software will right the rear one out of the equation.  But I have it on good authority that certain manufacturers' sport cats are so good, they won't throw up a CEL.  :innocent:

didnt get CEL with miltek sports cat but did with de - Cat

Dave from PDT said that the Milltek may be ok in that respect....happy days, might get mine fitted next week.  :happy2:

Title: Re: 3" Downpipes
Post by: E30Dom on October 06, 2011, 10:08:37 am

SO both sensors are fitted and the revo should delete the rear one through coding?

Title: Re: 3" Downpipes
Post by: heavyd on October 06, 2011, 10:44:23 am

I had no CEL light with my  milltek sports cat on stock or stage 1 maps :happy2:

Title: Re: 3" Downpipes
Post by: vRS_Pagey on October 06, 2011, 07:03:35 pm

Quote from: E30Dom on October 06, 2011, 10:08:37 am

SO both sensors are fitted and the revo should delete the rear one through coding?

That about covers it...... :wink: