[Jnasratyar]

Originally Posted by aypexe

Second the requests for more video footage of this exhaust, please! Or if anyone is in Raleigh area that can meet up in person, I just picked up a M340i and am looking at the COC exhaust of Alibaba.

That said, anyone order Titanium? Curious what the build on that is like. The price
I was quoted was not too bad for a full Ti catback...

https://youtube.com/shorts/H2AyDFyG2...bsQzGgfTJfNmsn

https://youtube.com/shorts/GZh2fniTU...Ez7F3MGsN8D-0Q

[sunbeh]

Originally Posted by bimmabum

Can you make a video on the sound from the outside of the car? Want to hear how it sounds with valves open and closed.

Originally Posted by dystynkt

If you ever have an opportunity to take a video of a cold start that would be awesome. I've been thinking about adding on the same DP to this exhaust, but been holding off in case its TOO loud.

Originally Posted by aidanmurphy

Someone upload some videos!

Originally Posted by aypexe

Second the requests for more video footage of this exhaust, please! Or if anyone is in Raleigh area that can meet up in person, I just picked up a M340i and am looking at the COC exhaust of Alibaba.

That said, anyone order Titanium? Curious what the build on that is like. The price
I was quoted was not too bad for a full Ti catback...

video wouldn't upload, posted it on streamable with valves open then closed, warm start: https://streamable.com/dxj8qb

Edit: immortalized it on youtube:

Description has a few timestamps if you wanted to go straight to open/closed valve revs
FYI, I took this vid earlier in the year with a stock DP, just installed the AA DP so I'll make another video. Love the lowkey burbles, honestly not a fan of the loud and obnoxious pops

[VegasG42]

Got my COC Boska - Jiangxi Boska cattback installed.

For $1,100 shipped, I am very happy.

[ifound2pac]

Originally Posted by VegasG42

Got my COC Boska - Jiangxi Boska cattback installed.

For $1,100 shipped, I am very happy.

Attachment 3629251

Attachment 3629252

What diameter tips? When I was talking to Alan I just said I wanted the M ones with chrome lining for the extra $100. I don't know if they're 100mm tips or what lol

[VegasG42]

Originally Posted by ifound2pac

What diameter tips? When I was talking to Alan I just said I wanted the M ones with chrome lining for the extra $100. I don't know if they're 100mm tips or what lol

I believe they are right about 93 mm

[HFW003]

Originally Posted by ifound2pac

What diameter tips? When I was talking to Alan I just said I wanted the M ones with chrome lining for the extra $100. I don't know if they're 100mm tips or what lol

I got 100mm tips put in mine.

[VegasG42]

Either size look good imo. The 100s fill out the exhaust opening a bit better and look more aggressive. The 'smaller' tips look nice and clean as well

[ifound2pac]

Originally Posted by HFW003

I got 100mm tips put in mine.

Originally Posted by VegasG42

Either size look good imo. The 100s fill out the exhaust opening a bit better and look more aggressive. The 'smaller' tips look nice and clean as well

Yeah I think I was curious because I can notice the gap more on mine (exhaust tips from Alibaba I bought earlier this year) which are I think 93s, if they have 100s in the style I want I may go for that.

Guess it depends how spaced out they are.

[HFW003]

Originally Posted by ifound2pac

Yeah I think I was curious because I can notice the gap more on mine (exhaust tips from Alibaba I bought earlier this year) which are I think 93s, if they have 100s in the style I want I may go for that.

Guess it depends how spaced out they are.

Here’s mine.

[ifound2pac]

Originally Posted by HFW003

Here’s mine.

If that's how mine ends up looking I'm 1000% happy

[HFW003]

Does anyone else have an issue with vibration?

Mine has a slight vibration around 1800 revs and it’s only when the valves are open which is strange?

Thanks

[M5wag]

Originally Posted by VegasG42

Haha, no worries. I ordered both types. They're cheap enough

Could you please explain how to wire the power supply to the fuse panel? I’m absolutely clueless with electronics so I need it dumbed down. Did you buy one of these “fuse taps” and put the power in fuse 251 and ground the circuit at some random metal bolt? Do you mind sending a picture of how you did it and what exactly you bought?

[M5wag]

Originally Posted by HFW003

Does anyone else have an issue with vibration?

Mine has a slight vibration around 1800 revs and it’s only when the valves are open which is strange?

Thanks

Yup mine does make a very odd noise for like a tenth of a second while I’m accelerating past 1800 RPM, but the exhaust fully cleared the brace and had a few millimeters of space from heat shield where the brace is so I think it’s just something I’ll live with. The exhaust is fantastic otherwise. And if you don’t mind could you please help with my question above since I know you were able to wire it to the fuse panel? Thanks

[HFW003]

Originally Posted by M5wag

Could you please explain how to wire the power supply to the fuse panel? I’m absolutely clueless with electronics so I need it dumbed down. Did you buy one of these “fuse taps” and put the power in fuse 251 and ground the circuit at some random metal bolt? Do you mind sending a picture of how you did it and what exactly you bought?

That’s exactly right. Buy the micro fuse tap, pull the fuse and put the tap in. There’s a ground bolt just next to the fuse box.

Sorry I don’t have a pic. Have a look on YouTube for an instruction vid if you’re not sure.

[M5wag]

Originally Posted by HFW003

That’s exactly right. Buy the micro fuse tap, pull the fuse and put the tap in. There’s a ground bolt just next to the fuse box.

Sorry I don’t have a pic. Have a look on YouTube for an instruction vid if you’re not sure.

Would you mind posting an Amazon link for the correct tap or anything else I’ll need? Thank you

[VegasG42]

Originally Posted by M5wag

Would you mind posting an Amazon link for the correct tap or anything else I’ll need? Thank you

BONATECH 1m Car Cigarette Lighter with Fuses Kit Car Cigarette Lighter Adapter Add-a-Circuit TAP Adapter Lead 1.0mm Cable with 12V Fuse Holder for Mini Standard ATM APM Blade Fuses (Small) https://a.co/d/hKBXl5I

This is the exact one. You get size small. Not micro. It goes into fuse place 251. And then you just ground it to anywhere in the trunk that's metal on metal. If it's not grounded well enough it just won't work. So it's extremely simple

[VegasG42]

Originally Posted by VegasG42

BONATECH 1m Car Cigarette Lighter with Fuses Kit Car Cigarette Lighter Adapter Add-a-Circuit TAP Adapter Lead 1.0mm Cable with 12V Fuse Holder for Mini Standard ATM APM Blade Fuses (Small) https://a.co/d/hKBXl5I

This is the exact one. You get size small. Not micro. It goes into fuse place 251. And then you just ground it to anywhere in the trunk that's metal on metal. If it's not grounded well enough it just won't work. So it's extremely simple

And when you pull out the 20 amp fuse out of spot 251, it plugs in to the spot on the cigarette lighter fuse adapter, and then you replug it back in to where the 20 amp fuse is closest in line to where it was originally. And then I just used a 15 amp fuse and the other spot to protect the valve box power supply

[VegasG42]

Originally Posted by vegasg42

and when you pull out the 20 amp fuse out of spot 251, it plugs in to the spot on the cigarette lighter fuse adapter, and then you replug it back in to where the 20 amp fuse is closest in line to where it was originally. And then i just used a 15 amp fuse and the other spot to protect the valve box power supply

[aypexe]

Has anyone opted for the Titanium version that can speak to it?

[ifound2pac]

Fair warning the exhaust does come in a bunch of little parts with tons of band clamps haha, so it's a fair amount of work compared to exhausts that come with larger pieces.

First shop I took it to guy was honest that he didn't work on BMWs and didn't feel comfortable about the wiring. "Brother it'll take an hour just to unwrap all the bubble wrap 😂".

Next guy said it's in his ballpark, they have done plenty of exhausts like this. I'll probably do the fuze/12V part at home and then take it in so they can do the wiring up to the trunk along with the exhaust.


They said probably $400-600 for the install

[ifound2pac]

Originally Posted by CBO

Yeah they've gotten really good at shipping here. I can't find a single thing wrong with the exhaust. Most of the major brands for our cars are buying these and rebranding them anyways. Might as well cut out the middle man, pay half the price and just wait an extra week for shipping.

Problem #1, I don't have a car jack or stands lol.

Problem #2, I think I actually lost some Jack points under my car from running over something. Dealer noticed it last time I went for an oil change.

So having to take it to a shop for the install and probably losing $500 to that, sucks but it's still cheaper than an OEM exhaust.

Is the wiring hard to do? Both valves share the same power connection?

[ashokgadeking]

I'm thinking about getting the tips laser engraved with the Alibaba logo on them.