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      03-15-2020, 03:21 PM   #1
Teerump
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Adding cats to my Dinan Xpipe

I'm wanting to add cats to my Dinan xpipe to cut back on the rich exhaust fumes. That's my only complaint with being catless. What would be the best options for doing that?
There's a guy on here selling the stock secondary cats, would that work just welding them in to the same location?
Or do high flow cats in the primary or secondary?

I know alot will say to sell mine and buy a different xpipe but I don't think I want to go that route. New high flow catted xpipes are pricey.
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      03-15-2020, 03:30 PM   #2
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My advice is to buy metallic magnaflow cats in 2.5" size off amazon or something and have them welded in to the secondary position

Do not put them in the primary position!!!
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      03-15-2020, 03:55 PM   #3
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Given the prices the Dinan X-pipe command on the used market, you could sell it and buy an RKP or similar one with cats and probably make money on the deal.
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      03-15-2020, 07:33 PM   #4
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Quote:
Originally Posted by ToddinTN View Post
Given the prices the Dinan X-pipe command on the used market, you could sell it and buy an RKP or similar one with cats and probably make money on the deal.
From my research, the Dinan has been going for around $1200 or so. The RKP from what I've seen is $1700
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      03-15-2020, 07:41 PM   #5
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Quote:
Originally Posted by SYT_Shadow View Post
My advice is to buy metallic magnaflow cats in 2.5" size off amazon or something and have them welded in to the secondary position

Do not put them in the primary position!!!
This one ? Looks like there's another like this but doesn't look as big, just not sure what's the right one to get.
https://www.amazon.com/MagnaFlow-599...omotive&sr=1-1

Last edited by Teerump; 03-15-2020 at 08:00 PM..
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      03-15-2020, 08:59 PM   #6
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https://www.amazon.com/dp/B000VX96IS..._qXInCb7KX3XJK

This is the one I used

The last time we did this we used a Bimmerworld Race xpipe with resonators and had these cats welded to the secondary position. What a great setup
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      03-15-2020, 10:25 PM   #7
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Quote:
Originally Posted by SYT_Shadow View Post
My advice is to buy metallic magnaflow cats in 2.5" size off amazon or something and have them welded in to the secondary position

Do not put them in the primary position!!!
Why not primary? Would that reduce fumes and allow emissions to be passed for those of us in those areas? I hear a stage two tune kills the cats quicker, but unsure if other downsides.
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      03-16-2020, 07:15 AM   #8
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Quote:
Originally Posted by SYT_Shadow View Post
https://www.amazon.com/dp/B000VX96IS..._qXInCb7KX3XJK

This is the one I used

The last time we did this we used a Bimmerworld Race xpipe with resonators and had these cats welded to the secondary position. What a great setup
any vids? did it get rid of some rasp?
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      03-16-2020, 07:55 AM   #9
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Quote:
Originally Posted by sappy13 View Post
Why not primary? Would that reduce fumes and allow emissions to be passed for those of us in those areas? I hear a stage two tune kills the cats quicker, but unsure if other downsides.
It still won't pass emissions

And maybe you're unlucky like me and you melt the aftermarket primaries and blow you engine. See thread linked in sig
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      03-16-2020, 07:56 AM   #10
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Quote:
Originally Posted by Shaan View Post
any vids? did it get rid of some rasp?
No vids. I don't sell this stuff, just sharing advice

Cats and resonators take care of most of the rasp. Cats more than the resonators IMO

Last edited by SYT_Shadow; 03-16-2020 at 08:28 AM..
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      03-16-2020, 11:12 AM   #11
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OP, I just ordered Magnaflow 59956 high flow cats for my Dinan X Pipe. I plan to put them in place of the rear most resonators. They were around $200 total from eBay.
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      03-16-2020, 11:29 AM   #12
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You should probably just get a different xpipe, the dinan one is discontinued and you can easily sell it. Adding cats will likely mess with the sound which is great, especially when paired with the dinan axleback
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      03-16-2020, 01:26 PM   #13
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Quote:
Originally Posted by Johal E32 View Post
OP, I just ordered Magnaflow 59956 high flow cats for my Dinan X Pipe. I plan to put them in place of the rear most resonators. They were around $200 total from eBay.
Anxious to hear your opinion on how it sounds!
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      03-16-2020, 01:28 PM   #14
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Quote:
Originally Posted by xander_g View Post
You should probably just get a different xpipe, the dinan one is discontinued and you can easily sell it. Adding cats will likely mess with the sound which is great, especially when paired with the dinan axleback
I'm debating on doing that. I've got the full Dinan exhaust, and tune. Certainly don't want it to sound like crap. Just want to get rid of the exhaust fumes. Thought about adding the cats, and going to an ACM mod rear section too. Not sure how that would sound compared to the Dinan though.
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      03-16-2020, 01:31 PM   #15
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Quote:
Originally Posted by Teerump View Post
I'm debating on doing that. I've got the full Dinan exhaust, and tune. Certainly don't want it to sound like crap. Just want to get rid of the exhaust fumes. Thought about adding the cats, and going to an ACM mod rear section too. Not sure how that would sound compared to the Dinan though.
ACM mod is waaaay louder than Dinan section 3.
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      03-16-2020, 01:43 PM   #16
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Quote:
Originally Posted by Teerump View Post
Anxious to hear your opinion on how it sounds!
I'll upload a video to Youtube in a few weeks once it is installed, I'll be sure to send you a link
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      03-16-2020, 02:25 PM   #17
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Quote:
Originally Posted by Johal E32 View Post
I'll upload a video to Youtube in a few weeks once it is installed, I'll be sure to send you a link
Yes please!
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      03-16-2020, 02:27 PM   #18
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Quote:
Originally Posted by BayE30 View Post
ACM mod is waaaay louder than Dinan section 3.
Loud as in obnoxiously loud? The vids I've watched it seems to be a deeper sound, which I like. But I don't want something obnoxious. The Dinan sounds good, wish it was a little deeper rumble.
Would OEM 2 pipe mod be more of what I'm looking for.
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      03-16-2020, 02:54 PM   #19
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2 pipe mod mite be closer to what yer looking for. The 4 pipe ACM mod is almost straight pipes in the rear. yes it tone is deeper, but man its loud.

if i were you i would go ahead and have some quality HFC welded in place of the forward resonators. see how you like that sound with the Dinan mufflers.
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      03-16-2020, 03:03 PM   #20
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Quote:
Originally Posted by SYT_Shadow View Post
https://www.amazon.com/dp/B000VX96IS..._qXInCb7KX3XJK

This is the one I used

The last time we did this we used a Bimmerworld Race xpipe with resonators and had these cats welded to the secondary position. What a great setup
No fitment issues with putting these in just forward of the resonators?
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      03-16-2020, 03:32 PM   #21
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Probably a dumb question.. but 2 put cats in at the secondary position, do 2 of the resonators need to be removed?
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      03-16-2020, 03:32 PM   #22
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Quote:
Originally Posted by Teerump View Post
No fitment issues with putting these in just forward of the resonators?
Not on the BW xpipe

Here are some pics









And here are some pics of my primary HFCs in my original ESS Xpipe. There are pics of my blown engine torn down in the forum.



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