Supersprint Long Tube + Resonated Mid Pipe

[Genes1s]

I'm only doing this just for the noise, don't care too much about HP, etc, etc.

Currently, I have AA Muffler (Cat Back) on stock everything. That is better than stock, but I feel the need to hear it little louder. So been thinking about getting Header + Mid section.

Just would like to confirm:
1. That in order to install this Supersprint mid pipe p/n # 785402 I would need to combine it with Supersprint Long Tube header 785501? I would then need to get O2 simulator or have CEL (no need to pass smog here in my area). Is there a cheaper long tube header out there that would fit to SS mid pipe.
2. Would these combo bolt on to the AA Muffler that I currently have?
3. There is also the mid section X pipe. Would this be SS mid pipe be less loud (due to the resonator)?

https://www.ecstuning.com/b-superspr...inless/785422/
https://www.ecstuning.com/b-superspr...eaders/785501/

If anyone has the AA Cat Back + SS mid + SS Long Tube headers, I'd like to hear your experience with it.

Thanks

[NoLastName]

I have the Supersprint Tubolare header and resonated midpipe bolted up to a Stromung muffler section. Header and midpipe fit together as a set. To my knowledge there isn't another long tube header that bolts directly to a SS midpipe. Unlike other sets, these pieces go together as a slip fit without flanges. You could make another header work but you'd have to get someone to weld flanges onto the midpipe. There would be fabrication involved.

The SS midpipe will bolt to any muffler section that has stock length and flanges. So yes, your AA will fit just fine. The SS midpipe has one bung for an O2 sensor. My M3 is OBD1 which means I only have one O2 sensor and it's a direct fit. For OBD2 use you could probably have additional bungs welded into the header and midpipe. I have no experience with O2 simulators so I'll leave that for others to comment on.

Sound with SS header + resonated midpipe is throaty and quite a bit louder than stock but I wouldn't call it obnoxiously loud. A non-resonated midpipe would be considerably louder. And while the SS header isn't cheap, it's a super nice piece. They do a good job with the welds and ports. The drawback is it's not a bolt-on solution. It requires the matching SS midpipe and will be missing O2 bungs for your application.

[cbredesen]

Excuse my relative ignorance here - would the Raceland header do a similar job here (size + noise) as described? I would not expect SS quality but what about the rest of the deal?

[Genes1s]

For OBD2 use you could probably have additional bungs welded into the header and midpipe. I have no experience with O2 simulators so I'll leave that for others to comment on.

This is interesting idea, but not sure if the parameters would work, I would think that the ECM is reading different value between these 2 sensors.

[bluptgm3]

The ECM uses the head pipe twin O2 sensors to control mixture.
The post-catalytic converter sensors are ‘watch dog’ monitors for catalyst efficiency only, these can be programmed out of the ECM/ECU/DME. Additionally, post-‘cat’ simulator can be used with stock ECU.


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[bluptgm3]

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[NoLastName]

This is interesting idea, but not sure if the parameters would work, I would think that the ECM is reading different value between these 2 sensors.

The ECM uses the head pipe twin O2 sensors to control mixture.
The post-catalytic converter sensors are ‘watch dog’ monitors for catalyst efficiency only, these can be programmed out of the ECM/ECU/DME. Additionally, post-‘cat’ simulator can be used with stock ECU

Ah yes... sorry for the confusion. I forgot there are post-cat sensors with OBDII and the SS midsection has no catalytic converter. My bad.

[Carpy2]

The SS midpipe has one bung for an O2 sensor. My M3 is OBD1 which means I only have one O2 sensor and it's a direct fit. For OBD2 use you could probably have additional bungs welded into the header and midpipe. I have no experience with O2 simulators so I'll leave that for others to comment on.

I have Raceland longtube reps, US cats, and SS race muffler. I'm OBD2 and obviously don't have an issue with my O2 sensors because I still have the US cats, but you do have to worry about the Secondary Air Pump system with the headers.

OBDII cars have a SAP that runs on startup (helps with cold starts, recycles rich fuel). It grabs air from two ports on the stock headers and will throw a code if the measurements are off, or is removed. SS headers and Raceland reps do not have the two ports necessary to let those exhaust gases out, so you will have to either get the CEL coded out, or run a simulator like this one. I've been using his SAP sim with no issues. And at that point, there's no reason to have the SAP at all so you might as well remove the whole system.

And just as a note, I know I'm still running US cats, but this setup is pretty quiet. I went from a Dinan muffler and stock headers to this and it's really not that much louder... Feels like a half step up, not a full step up I would expect from the "race" version.

[QtheGenius]

OP, I have SuperSprint long headers, custom mid section with resonators (no cats), and a Strommung cat-back. I have a tune that ignores the O2 sensors. All this being said, I"m going to try to get the car CA SMOG legal, so the headers and mid-pipe will be coming off. I'll probably do that after this whole Stay At Home decree is lifted, so these two sections would be available. This would be plug and play for your application, and you keep your catback. Factor about two months until they are ready. Lemme know if you would be interested at all.