The Official Downpipe/Test Pipe/Race Pipe Thread

[greatdane68]

No, but I do know that you'd better have fuel pump internals.

[esestak]

Got a noob question, and its probably been answered here so sorry in advanve for a repeat post. My question is: im thinkning about adding a new down pipe or long pipe. Do i need to add anything else before i do that? My ms3 is completely stock right now

[jtt]

The answer you need is in the post right above yours + in the stickies

[jeopardy98]

Originally Posted by esestak Got a noob question, and its probably been answered here so sorry in advanve for a repeat post. My question is: im thinkning about adding a new down pipe or long pipe. Do i need to add anything else before i do that? My ms3 is completely stock right now

If you know it has been asked why not go find the answer and stop being a lazy ass brownie.

[maisonvi]

Originally Posted by esestak Got a noob question, and its probably been answered here so sorry in advanve for a repeat post. My question is: im thinkning about adding a new down pipe or long pipe. Do i need to add anything else before i do that? My ms3 is completely stock right now

Annoyed I can't groan you from my phone

Sent while "doing the speed limit"

[Hush]

Originally Posted by maisonvi Annoyed I can't groan you from my phone Sent while "doing the speed limit"

Adressed this for you, now I wish I could groan him twice.

[greatdane68]

Even I have to agree with everybody on this one. If you know the question's been asked, why don't you do a search? I at least do that much before answering a question. THEN I say that I couldn't find it.
Goodness man!!! Don't get these boys started. Oh wait! You already did. RUN FOR THE HILLS!!!!!

[esestak]

My bad guys, i just joined yesterday so im still learning to navigate this site..

[MS6_Newb]

to be nicer you need pump internals and I highly suggest a Cobb AccessPort

[jeopardy98]

Originally Posted by esestak My bad guys, i just joined yesterday so im still learning to navigate this site..

Let me help. Go to the top of the page, click search, type in your query. Win.

Or

Google.com

[maynard576]

Quick question before money is spent. Planning on buying the corksport catted downpipe. Will the 80mm bolt to the stock catback. Plan to upgrade the catback in the future but don't want to get the smaller diameter just to end up needing a larger diameter later.

[Jedtgill]

ok so after tons of research and many different opinions im stuck between an M2 downpipe or the corksport downpipe and test pipe what do you suggest the M2 price is so attractive

[smoogs12]

Originally Posted by Jedtgill ok so after tons of research and many different opinions im stuck between an M2 downpipe or the corksport downpipe and test pipe what do you suggest the M2 price is so attractive

You're over thinking it.

At the end of the day they are both just stainless steel pipes.

I have never heard anything bad about the ebay dp, except for the gaskets they provide with it.

[Jedtgill]

would the stock gasket suffice

[smoogs12]

Originally Posted by Jedtgill would the stock gasket suffice

If its not fubar then yes. If its junk, replace with oem.

Tapa

[Jedtgill]

thanks guys yall just saved me like 200 bucks

[cshunter]

Always better to be safe and get another one, or at least have another one on hand when you swap it out so if it is messed up, you are good to go.
Could return it if not needed.

[greatdane68]

Have there been anymore complaints about the CNT catted downpipe? That's the one I'd like to get.

[Jin]

Anyone running on CS downpipe + racepipe has the boost spike problem? Considering this combo va the cnt catted one. Preferr the CS but I hear that without a boost controller ppl are encounting boost spike problem.
Thanks!

[chuckms6]

Originally Posted by Jin Anyone running on CS downpipe + racepipe has the boost spike problem? Considering this combo va the cnt catted one. Preferr the CS but I hear that without a boost controller ppl are encounting boost spike problem. Thanks!

Most people here are tuned, so that is a non-issue.

Tapatalking

[jomc111]

Originally Posted by Jin Anyone running on CS downpipe + racepipe has the boost spike problem? Considering this combo va the cnt catted one. Preferr the CS but I hear that without a boost controller ppl are encounting boost spike problem. Thanks!

I tend to spike to 21 sometimes 22. Initially but then settles back to 20 where I want it . Im on mbc

[Jin]

Originally Posted by chuckms6 Most people here are tuned, so that is a non-issue. Tapatalking

When u say tuned, does an AP map included? Thanks!

Originally Posted by jomc111 I tend to spike to 21 sometimes 22. Initially but then settles back to 20 where I want it . Im on mbc

See. Thanks man!

[jomc111]

Originally Posted by Jin When u say tuned, does an AP map included? Thanks! See. Thanks man!

Im aslo BT so , dont know if you are or not

[TiGraySpeed6]

Generically, "tuned" means taking that Cobb AP map, or OTS map, and making changes to it to match the mods on your car and your environment.

Such changes, while covering several areas, would normally include adjustments to prevent spikes if you're some form of EBCS like the stock 2 port or an aftermarket 2 or 3 port configuration.

[Jin]

Originally Posted by TiGraySpeed6 Generically, "tuned" means taking that Cobb AP map, or OTS map, and making changes to it to match the mods on your car and your environment. Such changes, while covering several areas, would normally include adjustments to prevent spikes if you're some form of EBCS like the stock 2 port or an aftermarket 2 or 3 port configuration.

So the AP can act like a boost controller.
Thanks man!

Originally Posted by jomc111 Im aslo BT so , dont know if you are or not

I'm still running the stock turbo....

[sidekick]

Originally Posted by Jin So the AP can act like a boost controller. Thanks man!

Oh god... Please just get an E-tune... I mean technically yes, the AP controls WGDC, but it is not a boost controller. It just tells the boost controller what to do.

[redboat]

just bought ebay DP (not installed yet), have AP stage 1 tune, just prepaid for AT intrnals and now have to wait for them.

First question, can I disable the none cat cel with ATR if i already have my EGR block (P0401) cel disabled? Or would using a spark plug fouler be better for tuning purposes?

Also should i just wait for the AT internals (unknown arrive date), or save $30 and get the re disigned KDM's internals shipped tomorrow?

[sidekick]

Originally Posted by redboat just bought ebay DP (not installed yet), have AP stage 1 tune, just prepaid for AT intrnals and now have to wait for them. First question, can I disable the none cat cel with ATR if i already have my EGR block (P0401) cel disabled? Or would using a spark plug fouler be better for tuning purposes? Also should i just wait for the AT internals (unknown arrive date), or save $30 and get the re disigned KDM's internals shipped tomorrow?

The rear O2 sensor isn't factored into fueling as far as I'm aware. It is mainly for checking the function of the catalytic converter in the downpipe. I would just turn the CEL off if you don't have inspections though. There's no point in lying to the ECU if you don't have to.

[StayBroke]

Originally Posted by sidekick The rear O2 sensor isn't factored into fueling as far as I'm aware. It is mainly for checking the function of the catalytic converter in the downpipe. I would just turn the CEL off if you don't have inspections though. There's no point in lying to the ECU if you don't have to.

You are right on the 6 and first gen 3's. But the gen 2 ms3 have to have that rear o2 in the exhaust stream.

sent to you from me

[sidekick]

Originally Posted by StayBroke You are right on the 6 and first gen 3's. But the gen 2 ms3 have to have that rear o2 in the exhaust stream. sent to you from me

So do Gen1s and MS6s. What I'm saying is that it is only used to make sure that the cat is functioning properly. It will throw a code if you remove the cat, but I personally, would rather uncheck the CEL than use hardware to "trick" the ECU into thinking the cat is still there.

[StayBroke]

Originally Posted by sidekick So do Gen1s and MS6s. What I'm saying is that it is only used to make sure that the cat is functioning properly. It will throw a code if you remove the cat, but I personally, would rather uncheck the CEL than use hardware to "trick" the ECU into thinking the cat is still there.

I need to edit my post.....gen 2 use it for air fuel mixture also. Thats why I said you have to have it in stream. You can not run a defouler as it would effect the tuning ability.

sent to you from me

[sidekick]

Originally Posted by StayBroke I need to edit my post.....gen 2 use it for air fuel mixture also. Thats why I said you have to have it in stream. You can not run a defouler as it would effect the tuning ability. sent to you from me

Oh, now I see what you're saying. I wasn't aware that the gen2s used the rear O2 for fueling. Is it only used in CL?

[StayBroke]

Think op but you have to get a tuner to answer all of them?

sent to you from me

[treavis]

Very helpfull! thanks guys.

[Rcimp]

I just installed my CNT catted downpipe and KMD internals last Saturday. I occasionaly get the CEL flagging the cat but I have the #2 O2 sensor extender left to install. I left it out to see if I really need it and it looks like I do. Just waiting until oil change time to get back under the car.

The KMD internals were pretty easy to install thanks to all of the threads and pics on here and KMD's instructions. Very nice fuel pressures now.

I am getting the P2187 code and have been for some time. So far I have replaced the Purge Solenoid valve, and then I saw my BOV bypass hose had cracks in it where it connects to the BOV so I purchased a new CorkSport silicone bypass hose and installed it. Unfortunately I am still getting the code. Next is cleaning the MAF and further vacuum hose inspestion.

[chuckms6]

Originally Posted by Rcimp I just installed my CNT catted downpipe and KMD internals last Saturday. I occasionaly get the CEL flagging the cat but I have the #2 O2 sensor extender left to install. I left it out to see if I really need it and it looks like I do. Just waiting until oil change time to get back under the car. The KMD internals were pretty easy to install thanks to all of the threads and pics on here and KMD's instructions. Very nice fuel pressures now. I am getting the P2187 code and have been for some time. So far I have replaced the Purge Solenoid valve, and then I saw my BOV bypass hose had cracks in it where it connects to the BOV so I purchased a new CorkSport silicone bypass hose and installed it. Unfortunately I am still getting the code. Next is cleaning the MAF and further vacuum hose inspestion.

next mod should be selling that XEDE and getting an ap...

[Rcimp]

Thinking about that but I have yet to find anyone that can give me an adequate reason instead of "it just sucks" or "AP is better". How about you, you got the time? I am wanting the best bang for my buck so I welcome any and all feedback.

My best run so far has been hanging with a Maserati Gran Torismo up to 164MPH so right now I am kinda liking my Exede.

[chuckms6]

Originally Posted by Rcimp Thinking about that but I have yet to find anyone that can give me an adequate reason instead of "it just sucks" or "AP is better". How about you, you got the time? I am wanting the best bang for my buck so I welcome any and all feedback. My best run so far has been hanging with a Maserati Gran Torismo up to 164MPH so right now I am kinda liking my Exede.

well first of all its a piggyback computer system, which is never a good idea. the Accessport is a flash based tune.

second, if it was truly better, this wouldnt be the first im hearing of it. good tuning solutions find their way to the front of the pack very easily, like the AP has.

third, im calling bullshit on hanging with a "gran torismo" to 164.

however, this is the downpipe thread and i dont want to get too far off topic. just making a suggestion...

[Rcimp]

Let's start a new thread, "Exede / Ap"

[jreiden1]

Does anyone have leads to MSF members that can fab a custom downpipe for a BT build?