Does anyone run a full decat? Is it worth the hassle for BHP gain with the remap and messing about when it comes to MOT time.
Currently running a non res non valved Miltek.
Cheers.
Full decat.
Full decat.
RS4 B7 Sprint Blue, Miltek non res, Bilstein coilovers.
BMW 320d Le Man Blues M Sport LCI
205 GTI 1.9 Black non cat non power steering Completely standard.
BMW 320d Le Man Blues M Sport LCI
205 GTI 1.9 Black non cat non power steering Completely standard.
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chriswhite1992
- 2nd Gear
- Posts: 181
- Joined: Tue Nov 22, 2016 1:32 pm
Re: Full decat.
Not running decat yet but i have the pipes to go on. I dont think there a massive gain to be made but they sound alot growlier. Find a friendly mot station
Re: Full decat.
Obviously more to gain if you don't already have a pre cat delete.
Re: Full decat.
I have no cats on mine, we put it on the tester and it was about 100% out for passing.
Re: Full decat.
My car was decat when I bought it. The fumes gave me a headache.
Keep the OEM main cats (200 cell) or replace with sports cats if you're changing the whole system. Just ditch the 400 cell pre-cats; they're an unnecessary restriction.
Keep the OEM main cats (200 cell) or replace with sports cats if you're changing the whole system. Just ditch the 400 cell pre-cats; they're an unnecessary restriction.
2007 RS4 B7 Avant
Phantom Black | Black Optics | MRC Stage 2 | JC Weldfab Exhaust | KW V3 coilovers | H&R ARBs | 20" Ispiri ISR-8 | Titanium wing mirrors | Driving Passion Diffuser | CF Air Intake | Manifold deflap | Alcantara/leather retrim | TT RS Steering Wheel | Pioneer Apple Carplay HU, JL amp and sub, Focal components | Clear Headlight Lenses, Black Internals, 6000K Bulbs | Trups LEDs | LED Tail lights |
Re: Full decat.
My brother has a M3 which is full decat he has to drive with window open to deal with the fumes haha.
I could deal with the fumes as it's not my daily car. I'm weighing up my options between full decat and gutting the precats.
RS4 B7 Sprint Blue, Miltek non res, Bilstein coilovers.
BMW 320d Le Man Blues M Sport LCI
205 GTI 1.9 Black non cat non power steering Completely standard.
BMW 320d Le Man Blues M Sport LCI
205 GTI 1.9 Black non cat non power steering Completely standard.
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chriswhite1992
- 2nd Gear
- Posts: 181
- Joined: Tue Nov 22, 2016 1:32 pm
Re: Full decat.
Decat smells so good!
Re: Full decat.
I have full decat with non res Milltek. No fumes in the cabin, you must have a leak if you're having to open windows. Sounds awesome!
Current - 07 Sprint Blue RS4 Avant Black optics / Buckets / FBSW / MRC Stage 2 / De flapped Manifold / CAF / BMC filter / Decat / Non Res Miltek / Bilstein B16's / Tarox discs, pads and lines / H&R ARBs / 19x9.5 Ispiri ISR1 wheels / MPSS tyres / DTM carbon splitter
Previous - 06 Sprint Blue B7 S4 Avant JHM 91 tune / 2.5" Custom Cat-less DP's / Miltek Non Res Cat back / BMC filter / H&R springs / 19" Fox MS007 wheels/Good Year F1's / EBC TG discs / Yellow stuff pads
Previous - 06 Sprint Blue B7 S4 Avant JHM 91 tune / 2.5" Custom Cat-less DP's / Miltek Non Res Cat back / BMC filter / H&R springs / 19" Fox MS007 wheels/Good Year F1's / EBC TG discs / Yellow stuff pads
Re: Full decat.
I have a full decat also & couldn't be happier, sounds better & makes me feel a little better about the whole tax situation, we all pay more than enough so i will run what i want.
RS4 B7
MRC stage2 436ps-487nm
Revolution intake, custom CAF, carbon clean, deflaped manifold, JHM manifold spacers, Forge oil cooler, Forge spacers, full de-cat, Scorpion cat back, Trup's LED's, 20' S5 wheels, KW V3's.
Launch control & flat shift
MRC stage2 436ps-487nm
Revolution intake, custom CAF, carbon clean, deflaped manifold, JHM manifold spacers, Forge oil cooler, Forge spacers, full de-cat, Scorpion cat back, Trup's LED's, 20' S5 wheels, KW V3's.
Launch control & flat shift
Re: Full decat.
That's possible - the system that was on the car when I bought it was complete turd (from a company called vortex - avoid like the plague). It only ended up as a decat as the sports cats had failed, and then had been chopped out and welded back up, which I only discovered later.ASC wrote:I have full decat with non res Milltek. No fumes in the cabin, you must have a leak if you're having to open windows. Sounds awesome!
2007 RS4 B7 Avant
Phantom Black | Black Optics | MRC Stage 2 | JC Weldfab Exhaust | KW V3 coilovers | H&R ARBs | 20" Ispiri ISR-8 | Titanium wing mirrors | Driving Passion Diffuser | CF Air Intake | Manifold deflap | Alcantara/leather retrim | TT RS Steering Wheel | Pioneer Apple Carplay HU, JL amp and sub, Focal components | Clear Headlight Lenses, Black Internals, 6000K Bulbs | Trups LEDs | LED Tail lights |
Re: Full decat.
Turd lol Yeah I remember reading your thread and the hassle you had.
I had similar disaster on my car when I bought it. The guy had actually removed the main 400 cats instead of the pre cats although they were gutted but it was a mess.
I had similar disaster on my car when I bought it. The guy had actually removed the main 400 cats instead of the pre cats although they were gutted but it was a mess.
Current - 07 Sprint Blue RS4 Avant Black optics / Buckets / FBSW / MRC Stage 2 / De flapped Manifold / CAF / BMC filter / Decat / Non Res Miltek / Bilstein B16's / Tarox discs, pads and lines / H&R ARBs / 19x9.5 Ispiri ISR1 wheels / MPSS tyres / DTM carbon splitter
Previous - 06 Sprint Blue B7 S4 Avant JHM 91 tune / 2.5" Custom Cat-less DP's / Miltek Non Res Cat back / BMC filter / H&R springs / 19" Fox MS007 wheels/Good Year F1's / EBC TG discs / Yellow stuff pads
Previous - 06 Sprint Blue B7 S4 Avant JHM 91 tune / 2.5" Custom Cat-less DP's / Miltek Non Res Cat back / BMC filter / H&R springs / 19" Fox MS007 wheels/Good Year F1's / EBC TG discs / Yellow stuff pads
Re: Full decat.
I have Milltek cat bypass and a non res valved system. I get no fumes at all, even the wife says it sounds quieter than with cats. It's screams its balls off at 7500 revs in 3rd and at 170mph + is deafening. But that's extreme. Normal driving it pops and bangs nicely. I rate it highly, there has been some criticism of Milltek of late but I like my system. Weldfab wasn't available at the time, which is what I would go for now. If you're located near Coventry then your welcome to come round and go for a ride. Or better still wait for the next meet and see and hear all of the variables.
RS4 B7, Mugello Blue, K&W V3 & HR ARBs, set up by Centre Gravity, Milltek Valved Non Res & cat bypass pipes, BMC air filter, braided hoses, DOT 5.1, Terraclean, MRC Full Carbon Clean, MRC remap 448PS 477NM, 20" S7 alloys with 4mm spacers & Hawke spigots 66.6 > 57.1, AP Racing front discs. Sold Sept 2019. Now rocking an F80 M3
Re: Full decat.
Yours did sound good going past me at *ahem* high speed on the way to ADI.Covkiller wrote: ↑Sat Mar 04, 2017 8:38 pmI have Milltek cat bypass and a non res valved system. I get no fumes at all, even the wife says it sounds quieter than with cats. It's screams its balls off at 7500 revs in 3rd and at 170mph + is deafening. But that's extreme. Normal driving it pops and bangs nicely. I rate it highly, there has been some criticism of Milltek of late but I like my system. Weldfab wasn't available at the time, which is what I would go for now. If you're located near Coventry then your welcome to come round and go for a ride. Or better still wait for the next meet and see and hear all of the variables.
Re: Full decat.
You beat me to it Mike. Exactly what I was going to say!MikeFish wrote:Yours did sound good going past me at *ahem* high speed on the way to ADI.Covkiller wrote: ↑Sat Mar 04, 2017 8:38 pmI have Milltek cat bypass and a non res valved system. I get no fumes at all, even the wife says it sounds quieter than with cats. It's screams its balls off at 7500 revs in 3rd and at 170mph + is deafening. But that's extreme. Normal driving it pops and bangs nicely. I rate it highly, there has been some criticism of Milltek of late but I like my system. Weldfab wasn't available at the time, which is what I would go for now. If you're located near Coventry then your welcome to come round and go for a ride. Or better still wait for the next meet and see and hear all of the variables.
2007 RS4 B7 Avant
Phantom Black | Black Optics | MRC Stage 2 | JC Weldfab Exhaust | KW V3 coilovers | H&R ARBs | 20" Ispiri ISR-8 | Titanium wing mirrors | Driving Passion Diffuser | CF Air Intake | Manifold deflap | Alcantara/leather retrim | TT RS Steering Wheel | Pioneer Apple Carplay HU, JL amp and sub, Focal components | Clear Headlight Lenses, Black Internals, 6000K Bulbs | Trups LEDs | LED Tail lights |
Re: Full decat.
Thanks FaisalJ and MikeFish 
RS4 B7, Mugello Blue, K&W V3 & HR ARBs, set up by Centre Gravity, Milltek Valved Non Res & cat bypass pipes, BMC air filter, braided hoses, DOT 5.1, Terraclean, MRC Full Carbon Clean, MRC remap 448PS 477NM, 20" S7 alloys with 4mm spacers & Hawke spigots 66.6 > 57.1, AP Racing front discs. Sold Sept 2019. Now rocking an F80 M3
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