MK5 Golf GTI

All Things Mk5 => Modifications & Technical Area => Performance Modifications => Topic started by: Guv on April 07, 2010, 02:20:11 am

Title: Decat downpipe or miltek sports cat downpipe
Post by: Guv on April 07, 2010, 02:20:11 am
Hi all

what is the best route to go ? i have a decat down pipe . but also today ive picked up a full miltek turbo back system with sports cat and non res middle section . cant make my mind up what to do performance wise which one would be he best ?

cheers for you input
Title: Re: Decat downpipe or miltek sports cat downpipe
Post by: Hurdy on April 07, 2010, 04:25:10 pm
The decat would give more power. I did back to back dyno's with my Milltek system before and after the decat and it released another 4.5bhp by having no cat :happy2:
Title: Re: Decat downpipe or miltek sports cat downpipe
Post by: Guv on April 07, 2010, 05:22:44 pm
humm no loss of lower down torque ? ill be using it with bluefin stage 2 need to deside as i will sell the one i dont use lol
Title: Re: Decat downpipe or miltek sports cat downpipe
Post by: Hurdy on April 07, 2010, 08:40:17 pm
humm no loss of lower down torque ? ill be using it with bluefin stage 2 need to deside as i will sell the one i dont use lol

I gained 4.5lbft too, but the torque came in a little later. I can live with that with the amount I have (see sig!)
Title: Re: Decat downpipe or miltek sports cat downpipe
Post by: Janner_Sy on April 07, 2010, 11:38:29 pm
dont think about it as a loss of low down torque,

tat can be a positive thing, with a little less torque you can expect to have more traction  which can onlybe a good point. 

Title: Re: Decat downpipe or miltek sports cat downpipe
Post by: Rich on April 12, 2010, 09:55:38 pm
The decat would give more power. I did back to back dyno's with my Milltek system before and after the decat and it released another 4.5bhp by having no cat :happy2:

Did you leave it decat ? or with cat ?
Title: Re: Decat downpipe or miltek sports cat downpipe
Post by: Hurdy on April 12, 2010, 11:42:25 pm
The decat would give more power. I did back to back dyno's with my Milltek system before and after the decat and it released another 4.5bhp by having no cat :happy2:

Did you leave it decat ? or with cat ?

Now with decat. It has been on and off for the MOT.
Title: Re: Decat downpipe or miltek sports cat downpipe
Post by: Sie on April 17, 2010, 09:13:02 am
Does having the decat not bring on the engine management light??

Thanks

Sie
Title: Re: Decat downpipe or miltek sports cat downpipe
Post by: s3dubbin on April 17, 2010, 06:35:34 pm
Think revo map thet out for you.  :happy2:
Title: Re: Decat downpipe or miltek sports cat downpipe
Post by: Sie on April 18, 2010, 05:39:40 pm
Well im going to make and fit a 3'' TB system decated but make it so i can fit cat for mot, havent got around to getting a map done yet, will the light come on in the mean while, while i am saving for a Revo stage2 map??

Sie
Title: Re: Decat downpipe or miltek sports cat downpipe
Post by: x5pea on April 18, 2010, 06:17:54 pm
ive got a de cat pipe if anyone wants it, dunno what they are worth  :signLOL:, only done 2k miles
Title: Re: Decat downpipe or miltek sports cat downpipe
Post by: DaveyCupra on April 19, 2010, 09:26:55 am
The decatted 3 inch downpipes can be had for £170 or so brand new off of ebay, so I would say yours should be worth £120-£130 roughly.
Title: Re: Decat downpipe or miltek sports cat downpipe
Post by: x5pea on April 19, 2010, 02:25:34 pm
The decatted 3 inch downpipes can be had for £170 or so brand new off of ebay, so I would say yours should be worth £120-£130 roughly.

£100 it is  :happy2:
Title: Re: Decat downpipe or miltek sports cat downpipe
Post by: Jaywoo-GTI on April 27, 2010, 11:36:17 am
How come you took it off chris, will it make any difference a stage 1 car? Does it change the exhaust note much?
Title: Re: Decat downpipe or miltek sports cat downpipe
Post by: x5pea on April 28, 2010, 11:09:45 pm
How come you took it off chris, will it make any difference a stage 1 car? Does it change the exhaust note much?

Want it puka for mot next week