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      05-21-2013, 10:07 PM   #1
mainly
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which downpipes?

i want to liven up this thing a bit . sound wise and throttle response wise.

i was told specifically by my tuner to get downpipes with a genuine race cat (200 cell) and no spacer.


anyone know who produces these?



he told me NOT to go completely catless, as the f10 m5 needs both pre AND post-cat sensors for fuel/power management. this is not first hand knowledge so if any of you have knowledge to share on the subject id appreciate it.




they will be accompanied by an exhaust as well. thinking Eisenmann race or Meistershaft, but not completely decided yet.

Last edited by mainly; 05-21-2013 at 10:12 PM.
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      05-21-2013, 10:52 PM   #2
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Quote:
Originally Posted by mainly View Post
i want to liven up this thing a bit . sound wise and throttle response wise.

i was told specifically by my tuner to get downpipes with a genuine race cat (200 cell) and no spacer.


anyone know who produces these?



he told me NOT to go completely catless, as the f10 m5 needs both pre AND post-cat sensors for fuel/power management. this is not first hand knowledge so if any of you have knowledge to share on the subject id appreciate it.




they will be accompanied by an exhaust as well. thinking Eisenmann race or Meistershaft, but not completely decided yet.
The EAS website has a couple of options one of which includes a high flow cat.
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      05-21-2013, 11:33 PM   #3
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I have not seen a high-flow cat for the F10 other than the 400 cell or just go to the catless.
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      05-21-2013, 11:58 PM   #4
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I have not seen a high-flow cat for the F10 other than the 400 cell or just go to the catless.
Thanks.eas has a 300 cell advertised on their site. But he told me to go with a 200 cell. I want there to be a significant difference and im afraid 300 cell won't be much better than stock.
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      05-22-2013, 07:48 AM   #5
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catless youll get some exhaust fumes with windows open but on my 550i it made a huge power difference.. I will also be going catless on my M5 as soon as I get it next week.!!
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      05-22-2013, 02:12 PM   #6
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Still seriously considering the Catless from IND. I think that the modded sound with a near stock exhaust will definitely be nice.
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      05-22-2013, 07:53 PM   #7
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Quote:
Originally Posted by bm5bullit View Post
Still seriously considering the Catless from IND. I think that the modded sound with a near stock exhaust will definitely be nice.
i checked their site, couldn't see any downpipes.

they out yet?
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      05-24-2013, 12:45 AM   #8
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Manhart Racing has downpipes too
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      05-24-2013, 08:24 AM   #9
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Here's the question I really want to know ...

If you add DP's whether with or without cats will you need a tune to accompany the upgrade?
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      05-24-2013, 09:30 AM   #10
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Quote:
Originally Posted by BLACK MARKT View Post
Here's the question I really want to know ...

If you add DP's whether with or without cats will you need a tune to accompany the upgrade?
I will definitely want that option. Are you following that thread on the Manhart Tune Group Buy?
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      05-24-2013, 09:49 AM   #11
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The link is officially up on the AMS site

http://www.amsperformance.com/cart/a...downpipes.html

Here is a set we just shipped with the high temp coating-




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      05-24-2013, 10:23 AM   #12
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That is exactly what I am talking about. Nate, please pm the price for these bad boys.
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      05-28-2013, 08:50 AM   #13
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Down pipes

You guys suck now I want a set. $2999 is a bit pricey with cats. Anyone who has these installed please chime in. Looking for some experience with the catalyst version.

Peace
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      05-29-2013, 01:06 PM   #14
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We offer catless downpipes or catted downpipes that will fit with the OEM front pipes.

If you want to remain catted, I would highly recommend our catless downpipes + catted front pipes combo. The cats are moved downstream and reduced EGTs tremendously!

Going full catless is fine, we've found a work around to include microcats and not trigger a CEL. However anyone considering a catless system should pair it with a tune. The ECU restricts this car a lot!

Here is a link for more info:
http://supersprintlabs.com/portfolio...aust-rd-notes/

Full catless setup:
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      05-29-2013, 01:25 PM   #15
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Quote:
Originally Posted by Matt@Supersprint-USA View Post
The ECU restricts this car a lot!
This is exactly right. However the choices for a proper tune with a catless downpipe setup is extremely limited right now.
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      05-29-2013, 01:48 PM   #16
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I don't know much about these pipes but I do know kooks make some bad ass pipes.
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      05-31-2013, 09:29 AM   #17
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Quote:
Originally Posted by Matt@Supersprint-USA View Post
We offer catless downpipes or catted downpipes that will fit with the OEM front pipes.

If you want to remain catted, I would highly recommend our catless downpipes + catted front pipes combo. The cats are moved downstream and reduced EGTs tremendously!

Going full catless is fine, we've found a work around to include microcats and not trigger a CEL. However anyone considering a catless system should pair it with a tune. The ECU restricts this car a lot!

Here is a link for more info:
http://supersprintlabs.com/portfolio...aust-rd-notes/

Full catless setup:
thanks for your post, im definately interested. one thing for sure, no one can accuse you of fudging your dyno resuts to show bigger gains. 7 hp gain for all those mods. of course the question then becomes, is it worth 8-$9000 in upgrades for 7 hp?

i already have a tune. so ill have to check with my tuner to see if maybe it needs to be tweaked.

for catted version II, are these 200 cell cats?


btw, i thought dynos only showed wheel hp?

Last edited by mainly; 05-31-2013 at 12:16 PM.
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      05-31-2013, 01:03 PM   #18
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You need to look at gains across the powerboard instead of peak hp only, even more so on a torque monster such as the M5. High RPM arent its forté!

We're expecting much better results with a catless tune as the ECU simply cannot and wont adjust to the newly released exhaust flow. I would not expect a tune to allow this engine to breath much more at higher RPMs but would add tremendous amounts of mid-range performance.

Max horsepower +7,7 hp @ 5770 rpm
+16,5 hp @ 2900 rpm
+21,9 hp @ 4300 rpm
+21,2 hp @ 5400 rpm

Max torque +34,1 Nm @ 2930 rpm
+32,1 Nm @ 2100 rpm
+38,7 Nm @ 2900 rpm
+31,2 Nm @ 4000 rpm
+30,2 Nm @ 5100 rpm

The catless downpipes were designed to fit with the OEM front pipes as well as any downpipe-back exhaust. Thery are 80mm in diameter with a 70mm slip connection. The microcats are an extra $440 for the pair. We use 2x100 CPSI HJS metallic racing catalytic converters either on the downpipes or the front pipes.

I hope this helps!

Quote:
Originally Posted by mainly View Post
thanks for your post, im definately interested. one thing for sure, no one can accuse you of fudging your dyno resuts to show bigger gains. 7 hp gain for all those mods. of course the question then becomes, is it worth 8-$9000 in upgrades for 7 hp?

i already have a tune. so ill have to check with my tuner to see if maybe it needs to be tweaked.

for catted version II, are these 200 cell cats?


btw, i thought dynos only showed wheel hp?
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      05-31-2013, 01:18 PM   #19
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Quote:
Originally Posted by Matt@Supersprint-USA View Post
You need to look at gains across the powerboard instead of peak hp only, even more so on a torque monster such as the M5. High RPM arent its forté!

We're expecting much better results with a catless tune as the ECU simply cannot and wont adjust to the newly released exhaust flow. I would not expect a tune to allow this engine to breath much more at higher RPMs but would add tremendous amounts of mid-range performance.

Max horsepower +7,7 hp @ 5770 rpm
+16,5 hp @ 2900 rpm
+21,9 hp @ 4300 rpm
+21,2 hp @ 5400 rpm

Max torque +34,1 Nm @ 2930 rpm
+32,1 Nm @ 2100 rpm
+38,7 Nm @ 2900 rpm
+31,2 Nm @ 4000 rpm
+30,2 Nm @ 5100 rpm

The catless downpipes were designed to fit with the OEM front pipes as well as any downpipe-back exhaust. Thery are 80mm in diameter with a 70mm slip connection. The microcats are an extra $440 for the pair. We use 2x100 CPSI HJS metallic racing catalytic converters either on the downpipes or the front pipes.

I hope this helps!
yes i see what you mean.


so how much for just the downpipes with the race cats?

and sure they wont trigger a cel?
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      06-01-2013, 03:14 PM   #20
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