Who has a milltek on their RS4???

Post by **psg001** » Mon Aug 17, 2009 7:36 am

Just wondering, how many on here have the milltek exhaust fitted and what are their opinions about it i.e.

(1) worth the price?
(2) Non-res or resonated and are you happy with how loud it is?
(3) valved or non-valved (is there a big difference?)

I had a milltek non-resonated exhaust on my R32 and it sounded fantastic, completely transformed the cars sound. Sound has such a big effect on the driving experience. It only cost £450 which is cheap compared to the RS4 millteks isnt it?

Love the sound of the car but maybe wish it was a bit louder, not sure. Its pretty loud when you step on the loud pedal on the open road, but when you're in town its pretty quiet. Thats a good thing, but also as the driver would be nice to hear it burning all that fuel up!

Post by **booski** » Mon Aug 17, 2009 7:56 am

Non res valved...
Well worth the money, the valves make a big difference - valves open 70% and closed 30% of the time(transporting elderly relatives or the in-laws etc...)

Post by **Porky** » Mon Aug 17, 2009 9:40 am

It's an amazing sound but can drone between 1500 and 2000 revs, easily solved by changing gear!

It doesn't make mine feel faster but the noise fools you into thinking that...

It turns heads and makes me smile and that will do nicely!

Post by **chemical-ali** » Mon Aug 17, 2009 9:43 am

Non valved non res -

Great. So much better than stock. Can I live with it? Yes. Not a problem in the cabin at all and I almost always have 2 kids and an horrific missus on board. (Love her really).

With the non re non valve, they take about 500 miles to "bed in" when they quieten down a tad. There is a little drone about 1500 but I don't notice it at all.

A lot of people go for the non res valved or non valved res. My experience is go for the loudest option as it is great and the car sound dampening is supurb.

Good luck.

Post by **Marcus-RS4** » Mon Aug 17, 2009 9:58 am

Go GMG, you wont regret it!

Post by **Kingkong** » Mon Aug 17, 2009 10:12 am

I decided to do the exhaust mod first just to see how that compared in the cabin to the standard setup. Word on this forum is the milltek resonated is of similar sound to how I have it now, (valves always open) with the non-res significantly louder.

Iâ€™m in two minds with the milltek, I bought the RS4 because I love the performance, gone are the days of me buying a smaller car and trying to get performance out of it, What Iâ€™m trying to say is I love the V8 note the RS4 produces but I donâ€™t want to turn my car into something that I love when Iâ€™m in it but find when I have misses/mates in it etc itâ€™s all a bit loud etc..

Ideally I need to go for a ride in a RS4 with the res and non-res fittedâ€¦

KK

Post by **psg001** » Mon Aug 17, 2009 11:16 am

it would be ideal to hear one in real life before commiting to getting one. (i'm thinking non resonated, non valved)

anyone in the NW England with a milltek on the RS4 I could listen to??

Post by **sonny** » Mon Aug 17, 2009 11:24 am

I have fitted a Milltek free flow Down pipe and 200 Cell cats, mated u with the OEM exhaust, sound is great, feels a bit more poky too, im running a BMC panel filter and a MRC Custom remap, overall im happy.

I did have a Milltek Cat back Valved non res, that was great, but did drone in low revs, changing gear an it would cure the drone (along with a nice rumble).

Bottom line is, is it worth the money, YES

Post by **SR71** » Mon Aug 17, 2009 11:40 am

Just be aware that merely fitting a cat-back Miltek on the B7 will lose you 20-30ftlbs of torque.

Unless you get the car mapped at the same time, you'll get more noise but less of everything else.

If you go for the "full" Miltek system you might want to read this thread:

http://www.rs246.com/index.php?name=PNp ... ed+exhaust

I'm not sure if Miltek have changed their design subsequently...

Post by **P_G** » Mon Aug 17, 2009 12:49 pm

SR71 wrote:Just be aware that merely fitting a cat-back Miltek on the B7 will lose you 20-30ftlbs of torque.

Not doubting what you are saying SR71 but do you have the data supporting that? Would be interesting to see because if that is the case then it has to be design that causes that particulalry their housing of the OEM lambda sensor.

I say that because on B6 and B7 S4's you could fit cat back or full system exhausts with 100 or 200 CPSI cats and you would always get a increase in bhp and torque. I realise there are some difefrences between the S4 and RS4 engine but none enough to effect how gas outflows.

I am doing similar to sonny in replacing my OEM downpipes and cats with 200 CPSI cats and 2.5 inch type 304 s/s pipes couple to the x-pipe I already have but am keeping the OEM back boxes and valves. That way if back pressure (or loss of it) is an issue which I am not convinced it is (but perhaps is with Milltek) then the OEM boxes should retain this. But the main reason I am retaning the OEM boxes is that my exhaust fabricator reckons they are good for handling the extra flow given by their cat and x-pipe system and it retains the use of the OEM valves at a 1/4 of the cost of a full valved non res Milltek with 200 CPSI cats plus retains the OEM look and there are no quality issues with the tips which there has been of late with Milltek because of the s/s supplier.

Post by **_RS_** » Mon Aug 17, 2009 6:59 pm

SR71 wrote: If you go for the "full" Miltek system you might want to read this thread:

http://www.rs246.com/index.php?name=PNp ... ed+exhaust

I'm not sure if Miltek have changed their design subsequently...

Oxygen sensors have a response time of 100ms or more, and unless things have changed, they are ignored at WOT anyway. So real-time cylinder to cylinder control won't work like that.

To the OP, I have a full Milltek system non res non valved, love it. Never had any CEL issues. Have added a Revo tune since although my butt dyno couldn't tell the difference. Real dyno was 280ft.lbs at the wheels, on 91 US octane.

Post by **SR71** » Mon Aug 17, 2009 7:29 pm

The data comes from a comparison between mine and pippyrips car, at the time, the only difference being the Miltek system.

His torque curves were lower than mine throughout the bulk of the rev range although his ultimate power was about 2-3hp better than mine right at the top end.

His FATS times were lower.

But....he flowed more air.

It didn't make sense until we discovered that I could run ~10 degrees more advance than him...for what reason I/we have no idea...

I thought this was pretty common knowledge regards the Miltek on the B7?

Make of it what you will...

Post by **chemical-ali** » Tue Aug 18, 2009 12:19 am

SR71 wrote:The data comes from a comparison between mine and pippyrips car, at the time, the only difference being the Miltek system.

His torque curves were lower than mine throughout the bulk of the rev range although his ultimate power was about 2-3hp better than mine right at the top end.

His FATS times were lower.

But....he flowed more air.

It didn't make sense until we discovered that I could run ~10 degrees more advance than him...for what reason I/we have no idea...

I thought this was pretty common knowledge regards the Miltek on the B7?

Make of it what you will...

Professor SR71

Post by **DaytonaSarge** » Tue Aug 18, 2009 9:57 am

Am I the only one that likes the drone sometimes at 1500? Sounds like a powerstation powering up/down... plus on a gearshift mine makes a brilliant "PHEDUMMMM" noise as the revs drops.

All in all, GET ONE NOW!

Post by **mfire** » Tue Aug 18, 2009 6:34 pm

Got a non res valved system and absolutely love it. Was res but changed the centre pipes as wanted a bit more of the V8 rumble. Personally I couldn't live with a non valved as my wife hates the noise at full chat! Also non res with valves open at full chat and they can really here you coming and even step out in the road in their Hi Viz to wave you in!! Personally yes worth every penny, Non res is the way to go, valves do make a big difference to me. Good luck

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Who has a milltek on their RS4???

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