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BMW M5 F90 (2018+) General Forums Engine, Exhaust, Drivetrain, Tuning Modifications    Custom X Pipe vs Secondary Cat Bypass

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      07-06-2020, 06:15 PM   #45
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RK downpipes

https://www.instagram.com/p/CCUG-h7n...=13cf33cj0vq2y
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      07-07-2020, 12:55 PM   #46
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Originally Posted by cailas View Post
Maybe there are someone with full catlles +x pipe with stock catback?
Ended up ordering Remus Non resonated Cat back. Mid pipe is straight like super sprint. Axle back part should be shipped soon but mid pipe will be delivered mid to end of august.

Shoutout to Golan and Justin at Auto Talent for the best deal on the system and great help.
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      01-07-2021, 06:48 PM   #47
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I like my xpipe and 2ndary deletes

What did it cost you pls?
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      01-09-2021, 01:33 PM   #48
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Quote:
Originally Posted by GTATX View Post
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Originally Posted by BMWDriverX View Post
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Originally Posted by GTATX View Post
So stock secondaries fit like glove but ER won't. Just gutted secondaries and added the dinan x pipe welded not clamped. Sound is more refined then the straight pipes setup I had but I feel more torque maybe. Will drive a little more n update. Will also post before and after video.

Also should I smell any fumes under load anytime or no?
Shouldn't have any fumes with the primaries still on there, if you smell anything it might be for a couple hundred miles after gutting the secondaries its probably burning up whatever is left in there now that the ceramic core is out. Funny thing after installing the Dinan x pipe i also felt a little more low end torque but i did have the stock non comp resonator on there.


This is my sound before the secondaries were modified and straight pipe instead of X. Sound was more raw I think which I kind a miss now. I'll post the video with new setup soon but truly miss the rawness of straight set up.


This is my sound before the secondaries were modified and straight pipe instead of X. Sound was more raw I think which I kind a miss now. I'll post the video with new setup soon but truly miss the rawness of straight set up.[/QUOTE]


So this is just secondaries deleted with straight pipe?
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      01-09-2021, 02:41 PM   #49
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Originally Posted by GTATX View Post
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Originally Posted by BMWDriverX View Post
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Originally Posted by GTATX View Post
So stock secondaries fit like glove but ER won't. Just gutted secondaries and added the dinan x pipe welded not clamped. Sound is more refined then the straight pipes setup I had but I feel more torque maybe. Will drive a little more n update. Will also post before and after video.

Also should I smell any fumes under load anytime or no?
Shouldn't have any fumes with the primaries still on there, if you smell anything it might be for a couple hundred miles after gutting the secondaries its probably burning up whatever is left in there now that the ceramic core is out. Funny thing after installing the Dinan x pipe i also felt a little more low end torque but i did have the stock non comp resonator on there.


This is my sound before the secondaries were modified and straight pipe instead of X. Sound was more raw I think which I kind a miss now. I'll post the video with new setup soon but truly miss the rawness of straight set up.


This is my sound before the secondaries were modified and straight pipe instead of X. Sound was more raw I think which I kind a miss now. I'll post the video with new setup soon but truly miss the rawness of straight set up.

So this is just secondaries deleted with straight pipe?[/QUOTE]
This was just straight pipe and middle balance tube connecting both mufflers deleted. I ended up with Remus straight pipe exhaust, and Keller upper and lower catless.
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      03-12-2021, 09:58 PM   #50
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Quote:
Originally Posted by GTATX View Post
So this is just secondaries deleted with straight pipe?
This was just straight pipe and middle balance tube connecting both mufflers deleted. I ended up with Remus straight pipe exhaust, and Keller upper and lower catless.[/QUOTE]

Sorry for resurrecting this, how do you find the smell after deleting the primary cats?
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      03-12-2021, 09:59 PM   #51
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Originally Posted by BrntRubber View Post
Quote:
Originally Posted by GTATX View Post
So this is just secondaries deleted with straight pipe?
This was just straight pipe and middle balance tube connecting both mufflers deleted. I ended up with Remus straight pipe exhaust, and Keller upper and lower catless.
Sorry for resurrecting this, how do you find the smell after deleting the primary cats?[/QUOTE]
Wife cusses me out every-time but I don't think I can live without it.
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      03-14-2021, 07:17 PM   #52
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Originally Posted by GTATX View Post
Sorry for resurrecting this, how do you find the smell after deleting the primary cats?
Wife cusses me out every-time but I don't think I can live without it.[/QUOTE]

Because of the sound or the performance?
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      03-14-2021, 10:12 PM   #53
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Quote:
Originally Posted by GTATX View Post
Sorry for resurrecting this, how do you find the smell after deleting the primary cats?
Wife cusses me out every-time but I don't think I can live without it.
Because of the sound or the performance?[/QUOTE]
Both lol
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