Recommended exhaust

[ophten]

I am looking at upgrading the exhaust system for my 07 MS3. I called in to my dealer to check pricing on the Mazdaspeed3 Sport Exhaust (GRMS-8M-L26). The technician I spoke with quoted me ~$500 without installation, but pointed out that the power gains would be extremely minimal. He could not quote me a size, but he suggested that the piping was not significantly larger than the stock MS3 exhaust and it is only a cat-back as well. The only complimentary words he had about it were that it sounded deeper and more menacing than the stock exhaust.

Questions:
Does anyone have any further information regarding the size of the MS3 Sport Exhaust? Is there any benefit to fitting that piece on the vehicle and going with an alternate vendor for turbo to cat?

Who else does anyone recommend for turbo back exhaust systems?

When replacing headers back, what needs to be done in order to pass emissions testing (the non cheating definition of the word "pass")?

[D_Roc7822]

The dude at the dealership was correct... you wont see much of a HP gain if any if you upgrade to the mazdaspeed exhaust. Its basically just for sound like the guy said. The stock speed3 exhaust is pretty good straight outta the factory. The price for the mazdaspeed exhaust is accurate too, from what Ive seen. I would suggest getting the CPE Exhaust & downpipe... It sounds rediculous (as in good)... however its 1100.00 for the both of them. I dont remember all the details about the exhaust specifically but check out *************** for info on it. Has sound clips and video and everything. I do remember that you would have to cut the stock MS3 exhaust out and would prolly void your warranty. So if warranty is a concern then go with the mazdaspeed exhaust. Also I think replacing the downpipe might help add some HP but cant remember. Hope this helped. Oh and one more thing I remembered (lol its all coming back to me now) with the CPE exhaust you can choose between a straight pipe or a muffler... but CPE states that the straight pipe will be ungodly loud. Ive done my research on this exhaust... I know Im gonna get one.

[D_Roc7822]

website is street unit . com since it was *** out...

[ophten]

So if warranty is a concern then go with the mazdaspeed exhaust.

Warranty is a concern, but not the primary one. If anyone has had issues with warranty due to after market exhaust systems (not including headers), I'd love to hear about them.

I'll have to get under the car to confirm whether or not the stock one has to be cut out rather than removed in a more peaceful manner. When speaking with the technician, he did mention that the MS exhaust would need to be welded into place rather than bolted, so that seems to support your statement. I'm not terribly concerned with non performance enhancements, especially ones as noticable as noise so I'll probably stick with the stock exhaust for a bit.

[Jesse MS3GT]

Get a cp-e. wont see much gains but you will spool quicker, plus its turbo back!

[RXMmazdaspeed]

Get a cp-e. wont see much gains but you will spool quicker, plus its turbo back!

won't see much gains? the dyno sheets they have (assuming they are not falsified) show a 20hp gain with a large gain in the midrange, and a 40lb/ft of tq gain, with large gain both in low rpm's and the midrange.


go with the cp-e, it's what im saving up for

[Jesse MS3GT]

Well they also claimed x hp and tq from their intake. I only saw about a 9hp gain, 4tq at the wheels. I was on a dyno dynamics though. Just dont expect much from an exhaust, but the fact you spool quicker means you have the power sooner. Its better to have more power through your whole rev range vs making peak hp.
I want a CP-E exhaust too

[RXMmazdaspeed]

Well they also claimed x hp and tq from their intake. I only saw about a 9hp gain, 4tq at the wheels. I was on a dyno dynamics though. Just dont expect much from an exhaust, but the fact you spool quicker means you have the power sooner. Its better to have more power through your whole rev range vs making peak hp.
I want a CP-E exhaust too

very true. reading up on how they went about making the intake with the MAF and such seemed very intriguing, and that they weren't making just another cai for profit. theres a thread floating around on another forum somewhere. they seem like a reliable company with good products. but, claimes hp and tq always seems to be higher than the actual numbers.

[Haltech]

I was thinking about the Corksport Exhaust. Does the CPE sound better? Im actually trying to go with the least noisiest because if i toss on a downpipe, i dont want it extremely loud.

[Ahjun]

Well they also claimed x hp and tq from their intake. I only saw about a 9hp gain, 4tq at the wheels. I was on a dyno dynamics though. Just dont expect much from an exhaust, but the fact you spool quicker means you have the power sooner. Its better to have more power through your whole rev range vs making peak hp.
I want a CP-E exhaust too

LOL.....how do you not expect much from a full turbo back exhaust system(down pipe & catback)?

[whitey4311]

Well I would think that not expecting much on our car is vaild since it comes mandrel bent and bad ass just stock. On any other car adding all that then yeah gains would be higher.

I would like to see how that full turbo back kit would do but the noise would piss me off after a while. Its pretty loud with the CAI and stock exhaust but it sounds good as opposed to annoying.

[Jesse MS3GT]

I was thinking about the Corksport Exhaust. Does the CPE sound better? Im actually trying to go with the least noisiest because if i toss on a downpipe, i dont want it extremely loud.
I believe when you order the CP-E exhaust from *a certain website* you have the option of a few diff resonators and mufflers for a quieter sound.

IBBAN

[Haltech]

I believe when you order the CP-E exhaust from *a certain website* you have the option of a few diff resonators and mufflers for a quieter sound.

IBBAN

What does that do for flow? Does it kill it?

[mspro19]

Just got my exhaust done over the weekend...I have the Corksport Downpipe and I had an exhaust shop build me 3" all the way back to a kicked Apexi N1 muffler. No dyno yet but definite 2 car jump! the torque difference is insane! It sounds like a mean STI on throttle but normal driving you can barely hear it...just a little rumble...it has no restrictions...no cats, no resonators...just all straight pipe...I love it! I'll get some pics and vids up this week sometime. Oh and no lights the Corksport DP has a extension for the O2 sensor and it works great! Cost me 420.00 for the DP, 200.00 for the Muffler, and 250.00 for the custom exhaust and welding.

[Haltech]

Just got my exhaust done over the weekend...I have the Corksport Downpipe and I had an exhaust shop build me 3" all the way back to a kicked Apexi N1 muffler. No dyno yet but definite 2 car jump! the torque difference is insane! It sounds like a mean STI on throttle but normal driving you can barely hear it...just a little rumble...it has no restrictions...no cats, no resonators...just all straight pipe...I love it! I'll get some pics and vids up this week sometime. Oh and no lights the Corksport DP has a extension for the O2 sensor and it works great! Cost me 420.00 for the DP, 200.00 for the Muffler, and 250.00 for the custom exhaust and welding.

So the cork DP doesnt have any additional bungs for a add on wideband o2 sensor? I would like to check out your pics, so upload them soon please!

[mspro19]

So the cork DP doesnt have any additional bungs for a add on wideband o2 sensor? I would like to check out your pics, so upload them soon please!

They charged me $20.00 for the extra O2 bung for the Wideband...you just have to call them to get it done...

[knowledge007]

I guess nonone on this thread has seen and heard my vids. Check it out on youtube.com under user "jubanqt". All my vids are there with the setup I have.

[whitey4311]

Sounds good but it just seems too noticable if that makes sense. Stock exhaust you can hear a little bit but its not over the top like that.

Thanks for the clips because I have thought about doing this but am pretty sure I wont.

The inside noise would drive me nuts pretty fast and you werent really on the high RPM's either. If you want some noise that is the set up to get though and it sounds mean but not ricey which is killer.

[knowledge007]

Whitey please ask before you talk... Yes I was on the high rpms. Both vids where I was running it I switched out @ 5800 or higher rpms. Also both of those vids I had the front windows down.

There is not much more drone with windows up than the stocke exhaust.

And yes this is the most meanest MS3 here in Miami...buahahahaha

BTW, you control the loudness of this system.

[whitey4311]

You took video of the guages it wasnt at 5800 rpm when you were just chillin through town. That wasnt the worst part it was that cold start video that just was so damn loud at idle. I work with old people and do home health and even with the stock exhaust they hear me coming, lol. I am sort of over setting off car alarms I guess but some people still are in that stage so its all personal taste.

Thats cool though if you like this sort of thing but its not what I was looking for so I am glad someone got a video of all that to help others make a choice. It would suck to buy all that then not like it but hearing those videos makes the choice easy.

[knowledge007]

Well the idle video of course was at a cold start which every car runs @ 2k rpms at a cold start.

The guages vids was just to show cabin noise of course with the windows up. But past approx. 3500rpms, like I said there is not much more drone than that stock.

[ch77]

Sounds nice, really really nice.. This is the DP & exhaust I am looking at getting. How much did it cost you for installation?

I am looking at either driving the car down to CP-E for installation (7 hours on the road) or having my local mechanic do the job. I know either one is fully trustworthy, I'm just not sure my mechanic will want to do it.

Will this screw my warranty, I wonder?

[knowledge007]

I really don't know about the warranty. My dealer is the one who installed my exhaust. Me and my dealer have an agreement. The only thing I can tell you is to talk to your dealer and see what you guys can come up with. I always take the time to get to know my dealers for these reasons.

On the other hand, installation. I would recommend to find someone trustworthy b/c this installation is easy but very time consuming. As I and the dealer both agreed to take our time. I paid 250 for 3 hours and the regular rate and they even let me use my 10% voucher.

Anyway, I have installed this system twice if you have any questions then please feel free to ask.

If you think you can drive to CP-E and feel like putting some miles no your car I say go for it. Trust me, you will love the ride back and every minute there after.

(rockon)

[lokalmotive]

Sounds good. I really like it. I've been thinking about doing this setup and glad you had those vids posted up.

[ch77]

Well, my car almost never goes to the dealer, so I don't know what they'll say. The dealer I bought my car from is out of business, redundancies being what they are..

Partyka Mazda, the current dealer, is pretty good. I mean, the service advisors seem forthcoming and that. I doubt I'd bring the car there for this purpose, but you make a good point - it is worth consulting with them, so I'll have to see what they say.

Ahhhh, I want to do this so bad! Downpipe, exhaust, short shifter and upgraded mounts all around and I reckon I'm done.

Thanks! It looks like I'm going to be able to afford this very soon.

[knowledge007]

The power this car is putting out is amazing. The only I have left to do with the engine for now is tuning solution and short shifter. Then I will work on the suspension.

[lokalmotive]

I can imagine. After seeing the dyno graphs for some of the CP-E products and seeing your list I'd love to see what my car felt like with that. I love the power now but it's just an addiction. I NEED MORE!!! Haha.

[maestro]

You took video of the guages it wasnt at 5800 rpm when you were just chillin through town. That wasnt the worst part it was that cold start video that just was so damn loud at idle. I work with old people and do home health and even with the stock exhaust they hear me coming, lol. I am sort of over setting off car alarms I guess but some people still are in that stage so its all personal taste.

Thats cool though if you like this sort of thing but its not what I was looking for so I am glad someone got a video of all that to help others make a choice. It would suck to buy all that then not like it but hearing those videos makes the choice easy.

Exactly about personal preferrence. The Corksport DP and CBE in my car has surprised a few people with how quiet it is while cruising (2500-3000 RPM). A little extra drone when letting off the gas. Nice and aggressive when on the throttle. The old folks will still hear you coming though. I posted a sound clip in the exhaust sound thread but the mic was 3 feet away from the exhaust tip so it sounds louder than it is.
Good luck with whatever you get.

[whitey4311]

Yeah I think just the CAI is going to be fine for me then get rid of the car at about 50-60k and hope there is something else really kick ass in the same price range.

The clips all sound good but its not something I care to hear daily since it will turn too many heads and give off the racer image.

[ptperformance]

PM me, we have what you are looking for. Dyno results will be very soon.

[maestro]

PM me, we have what you are looking for. Dyno results will be very soon.

I expect to see and hear your 3 next time I'm in Seattle (hear ya). Issaquah in Sept????