[codestar]

I have their catless, I picked up from them in person andthey said they had one in the works but they didn't have a timeline for it when I bought. Would have chosen this one for sure.

Subb'd for a sound clip, will probably buy and remove the vibrant resonator I put in to tame the full straight pipe

[AmuroRay]

Ok, so we are all on the same page - comments regarding the "quality" of the catalyst are baseless. Right?

[Freestylerfalcon]

Originally Posted by AmuroRay

Ok, so we are all on the same page - comments regarding the "quality" of the catalyst are baseless. Right?

well if you look at cts turbos website there is nothing mentioned about the cat at all.

compare that to active autowerke, they state exactly what kind of cat they use and the specifications.

anyways i bit the bullet and ordered the cts turbo one.

hopefully it arrives soon.

[AmuroRay]

Originally Posted by Freestylerfalcon

well if you look at cts turbos website there is nothing mentioned about the cat at all.

compare that to active autowerke, they state exactly what kind of cat they use and the specifications.

anyways i bit the bullet and ordered the cts turbo one.

hopefully it arrives soon.

Ok, Active gives specifics on theirs, but in tangible terms?

Do we have any data in longevity, flow or emissions reductions?

[Freestylerfalcon]

Originally Posted by AmuroRay

Ok, Active gives specifics on theirs, but in tangible terms?

Do we have any data in longevity, flow or emissions reductions?

yeah youre right there doesnt seem to be any real data on those things.

just the assumption that you get what you pay for.

when i install mine ill do a write up and give some feedback on fitment, sound, smell and butt dyno.

[thejeremyman9]

Originally Posted by AmuroRay

Ok, Active gives specifics on theirs, but in tangible terms?

Do we have any data in longevity, flow or emissions reductions?

Data for longevity is going to be anecdotal short of any type of real-word durability testing which just doesn't exist for these aftermarket cats.

For flow, it stands to reason that the lower cell cats will allow more flow, although that's certainly not the only factor. Another major consideration is the actual diameter of the DP where the cap is located - some but not all significantly increase the DP diameter where the cat is located so there's more cross sectional area for flow (since the cat itself is taking up some of that by obstructing the flow). After all, the cat density is where most of the flow/power gains over stock are, right?

For emissions, not aware of any F3x that are undergoing the sniffer emissions test but in terms of the car's own cat monitors some throw and CEL and show emissions ready and others do not... so there is certainly some difference there.

[Boostedphil698]

Fabspeed and AA use HJS racing cats. I met the owner of Fabspeed at a car show back in July and he explained to me that cat technology has come very far. He also said anything sub 1000 dollars for cats are most likely garbage. HJS is the leading performance cat provider in the world. I plan on doing the Fabspeed cat once my warranty runs out.

[khj24]

In short, you shouldn't be buying this if you are trying to avoid a CEL. This is mainly for people who want the least possible restriction without having to go full catless so they can avoid some level of smell. This one also has the support bracket which the VRSF option does not have, which I personally would much prefer.

-Fitment
-Smell

That's really all that's needed to know at this point....

[AmuroRay]

Originally Posted by 435i_Phil

Fabspeed and AA use HJS racing cats. I met the owner of Fabspeed at a car show back in July and he explained to me that cat technology has come very far. He also said anything sub 1000 dollars for cats are most likely garbage. HJS is the leading performance cat provider in the world. I plan on doing the Fabspeed cat once my warranty runs out.

Based on what?

[Boostedphil698]

Originally Posted by AmuroRay

Based on what?

There are only two cats on the market that won't give you a CEL and they both use HJS cats, AA and Fabspeed. Do you really think a 400 dollar "performance" cat will really perform the way it should? The ER catted downpipe which is 800 dollars even gives a CEL cause the cat is not a quality cat.

[Logicoeur]

Originally Posted by 435i_Phil

There are only two cats on the market that won't give you a CEL and they both use HJS cats, AA and Fabspeed. Do you really think a 400 dollar "performance" cat will really perform the way it should? The ER catted downpipe which is 800 dollars even gives a CEL cause the cat is not a quality cat.

The cat doesn't necessarily have to prevent a CEL to "perform the way it should", it's there just to remove unburnt fuel in the exhaust. the degree to which it removes that fuel is what you get what you pay for, across the range of available options.

In any case, removing any of those hydrocarbons is better than catless.

[thejeremyman9]

Originally Posted by Logicoeur

The cat doesn't necessarily have to prevent a CEL to "perform the way it should", it's there just to remove unburnt fuel in the exhaust. the degree to which it removes that fuel is what you get what you pay for, across the range of available options.

In any case, removing any of those hydrocarbons is better than catless.

Modern cars use 3-way cats that reduce CO and NOx in addition to VOCs. In a sense you are right that the cat can still work to an extent and produce a CEL; the CEL is basically just saying its not as efficient as the (first section of the) OEM cat. The OEM cat also has the '2nd section' (after the secondary O2) that further treats the exhaust, which none of the aftermarket do.

Anyways, this discussion always ends up going in circles because theres no back to back quantitative testing of aftermarket catted DPs. There is obviously a difference between the cats and overall design in say VRSF vs fabspeed, but what that means for longevity/performance/emissions is not quantified. So, you generally just make your purchase decision based on whether or not you want the no CEL guarantee and/or emissions compliance.

Back on topic, still interested for the CTS impressions after install and test drive/logs.

[Boostedphil698]

Originally Posted by Logicoeur

The cat doesn't necessarily have to prevent a CEL to "perform the way it should", it's there just to remove unburnt fuel in the exhaust. the degree to which it removes that fuel is what you get what you pay for, across the range of available options.

In any case, removing any of those hydrocarbons is better than catless.

If you have a CEL for a cat you're not gonna pass emissions. Now, if the sole purpose it remove hydrocarbons that's different.

[kitchener]

I thought I'd decloak and mention my AA downpipe is tripping my CEL, but it's doing it intermittently ("180001 - Catalytic converter: Efficiency below limit value"). It's been installed for about a month. It's very intermittent -- the first time I hoped it was a one-off, but about every week and a half or so, it pops up again. This is with Shell, and Sunoco, 93 oct. Given the no-CEL guarantee I'm paying for with the AA dp, I think if it comes on again, I'll spend a few hundred more and get the Fabspeed.

[joni_titi]

If the quality is the same for all CTS turbo product I would stay away from their DP, I have their charge pipe and I was really disapointed by the quality(it was leaking badly from the 4 possible place it could leak) and the constumer service isnt better.

I hope for you that the DP will fit in place without major issu.

[TurboCanadian]

Im using the CTS charge pipe on my 16 435i with no issues thus far that I'm aware of. Was a tight fit on my X-Drive. I cant say anything about customer service since I have not dealt with them.

Mostly, I went with CTS as they are somewhat local to me if I needed any help.

I'm not saying your wrong. I just wanted to throw my experience out there as well. I do hope to put their DP in my car next year possibly. So I do hope there are no quality issues.

[khj24]

I'll probably grab this one and install it after I'm allowed to get my car inspected(stock DP) in advance of my yearly registration, I think it's in a few weeks. Even if it's not needed, I really do like the mounting bracket this one has.

[Freestylerfalcon]

mine is due to arrive in 2 days. will do the install this weekend.

god i am so excited

[Freestylerfalcon]

ive never done any logs on my car before. im on bm3 stage 1 at the moment with all stock hardware.

would doing some before and after logs provide any useful info?

[thejeremyman9]

Originally Posted by Freestylerfalcon

ive never done any logs on my car before. im on bm3 stage 1 at the moment with all stock hardware.

would doing some before and after logs provide any useful info?

Yes. You should always log before and after any hardware and/or software change. Ideally change one variable at a time and log again.

https://f30.bimmerpost.com/forums/sh....php?t=1732327

https://f30.bimmerpost.com/forums/sh....php?t=1710794

[Freestylerfalcon]

Originally Posted by thejeremyman9

Yes. You should always log before and after any hardware and/or software change. Ideally change one variable at a time and log again.

https://f30.bimmerpost.com/forums/sh....php?t=1732327

https://f30.bimmerpost.com/forums/sh....php?t=1710794

awesome write ups. i had a read.

redline in 4th is crazy fast, would a 3rd gear + half of 4th provide a decent log?

[Freestylerfalcon]

got the pipe today