Test Pipes or X-Pipe

[momo3605]

Originally Posted by flipm3

Agreed! Just to further confirm results from EAS, these were the results of Test Pipes and a XPipe from the dyno we use here in IL often. Both make excellent power, just a matter of preference and willingness to spend.

E92 M3 DCT w/ Test Pipes


E90 M3 DCT w/ XPipe (200cpsi Cats + Resonators)

I'm going to go out on a limb that you found the lowest TP increase to post here. Haha

http://www.m3post.com/forums/showthread.php?t=731276

Here's a guy who made 50whp from TP's, tune, and intake. Assuming the tune and intake added 10hp each, that leaves 30whp from the test pipes. There are hundreds of dynos on m3post that show test pipes adding 25-30whp just by themselves.

[dparm]

Resonators & X-pipes smooth out exhaust flow. They give a higher quality sound, in my opinion. If you lose those, you can count on a rougher and less refined sound. Some people like that though.

[remsM3]

Can you say Illegal and you can be penalize if caught. I heard 5K's per cat. An M3 has 4 and that is equal to $20K's. My 2 cents

[tareemaa]

Originally Posted by remsM3

Can you say Illegal and you can be penalize if caught. I heard 5K's per cat. An M3 has 4 and that is equal to $20K's. My 2 cents

I never heard of that.

I went with the MS xpipe/test pipe combo along with Megan exhaust, car sounds epic and still retains a very smooth sound, the pitch went up with the xpipe which I love.

[Evolve Automotive]

Originally Posted by remsM3

Can you say Illegal and you can be penalize if caught. I heard 5K's per cat. An M3 has 4 and that is equal to $20K's. My 2 cents

what state is this?

[flipm3]

Originally Posted by momo3605

I'm going to go out on a limb that you found the lowest TP increase to post here. Haha

http://www.m3post.com/forums/showthread.php?t=731276

Here's a guy who made 50whp from TP's, tune, and intake. Assuming the tune and intake added 10hp each, that leaves 30whp from the test pipes. There are hundreds of dynos on m3post that show test pipes adding 25-30whp just by themselves.

I'll admit that it is not as high as some other cars have shown, but I determine that to be due to difference in dyno technique, conditions, and simply how the cars DME decides to perform in that given circumstance.

Here are a few other dynos from EAS and Macht Schnell that are in the 15-20whp range. I don't mean to solely pinpoint EAS and Macht Schnell products, it's just the easiest to find their graphs on the forum.

I do agree though that there is quite the wide range of data out there from the benefits of a primary cat delete!

[pbonsalb]

Originally Posted by Evolve-US

what state is this?

It is federal law, not state law, that is the biggest worry:

http://www.epa.gov/otaq/cert/factshts/catcvrts.pdf

Individual states may also have laws that impose fines.

Assuming test pipes and catless x-pipes are sold for off-road purposes only, it is possible the seller may avoid liability. It might be advisable to have a waiver on file. Same goes for tunes that defeat the OBD2 emissions protection controls. This is probably true for both sellers and installers.

Anyone here with test pipes or catless x-pipes or emissions control defeating tunes is presumably using them only for track purposes. Most intelligent people would not write about their wrongdoing on the internet.

[momo3605]

Originally Posted by pbonsalb

Most intelligent people would not write about their wrongdoing on the internet.

you don't get around this forum very often do you?

[Someone?]

Originally Posted by pbonsalb

It is federal law, not state law, that is the biggest worry:

http://www.epa.gov/otaq/cert/factshts/catcvrts.pdf

Individual states may also have laws that impose fines.

Assuming test pipes and catless x-pipes are sold for off-road purposes only, it is possible the seller may avoid liability. It might be advisable to have a waiver on file. Same goes for tunes that defeat the OBD2 emissions protection controls. This is probably true for both sellers and installers.

Anyone here with test pipes or catless x-pipes or emissions control defeating tunes is presumably using them only for track purposes. Most intelligent people would not write about their wrongdoing on the internet.

What are you the internet exhaust police? Do you have any friends? cause you really sound like a no fun prude.

[M3Captain]

Originally Posted by remsM3

Can you say Illegal and you can be penalize if caught. I heard 5K's per cat. An M3 has 4 and that is equal to $20K's. My 2 cents

We live in the land of the free......

[Patrón]

Originally Posted by pbonsalb

It is federal law, not state law, that is the biggest worry:

http://www.epa.gov/otaq/cert/factshts/catcvrts.pdf

Individual states may also have laws that impose fines.

Assuming test pipes and catless x-pipes are sold for off-road purposes only, it is possible the seller may avoid liability. It might be advisable to have a waiver on file. Same goes for tunes that defeat the OBD2 emissions protection controls. This is probably true for both sellers and installers.

Anyone here with test pipes or catless x-pipes or emissions control defeating tunes is presumably using them only for track purposes. Most intelligent people would not write about their wrongdoing on the internet.

It's also illegal to drive faster than posted speed limits.

[pbonsalb]

I was at least answering a question and providing some helpful hints, although my response was not well received by some. Your unsolicited addition of another illegal automotive related activity probably won't be well received either.

[M3Captain]

Originally Posted by pbonsalb

I was at least answering a question and providing some helpful hints, although my response was not well received by some. Your unsolicited addition of another illegal automotive related activity probably won't be well received either.

There was actually some good conversation going on here.... lets try and keep it on topic!

[Koldun]

I have Dinan with test pipes and it sounds great. X-pipe sounds even better (I'll go on record that a full Dinan exhaust is the best sounding option for this car, period), but you don't gain much in the way of power over the test pipes (5-10HP max on most dinos I've seen), it stinks really bad, and it will throw shit all over your rear bumper.

[Patrón]

Originally Posted by M3Captain

There was actually some good conversation going on here.... lets try and keep it on topic!

join a local bmw group and see if someone has a setup like what you are looking for. that is how I've determined that I atleast want some resonators vs straight pipes.

straight pipes are awesome but boy are they loud. my car is already cop magnet red.

[Ezio]

its without a doubt federal crime to remove cats or even changing the location is a crime. (high flow cats )(even when it passes a emission testing ) the problem cops really don't enforce it. because there are wayyyy more people who drive stock cars and dont mess with cats. its not a big problem if a small percentage of people run catless

with that said i wouldn't worry about running catless. i would go X pipe over test pipes. just to not have to hack up the OEM. but doing test pipes is much cheaper.

[Someone?]

God man you guys make sound so bad, and you keep repeating it over and over, just drop the crime BS.
You guys are about as much fun as a Root Canal sometimes you know.

[ZEEM3R]

I have Fabspeed X pipes and macht schnell test pipes and love them. My car passes NY inspection so I don't have to worry about any legal issues.

[US///M3]

You guys with your catless setups are big polluters.

[M3Captain]

Originally Posted by Ezio

its without a doubt federal crime to remove cats or even changing the location is a crime. (high flow cats )(even when it passes a emission testing ) the problem cops really don't enforce it. because there are wayyyy more people who drive stock cars and dont mess with cats. its not a big problem if a small percentage of people run catless

This is for off-road use only!!!

[US///M3]

Originally Posted by M3Captain

This is for off-road use only!!!

That's right because race car. Hahahaha

[Ezio]

Originally Posted by M3Captain

This is for off-road use only!!!

so that means if you go buy a off road exhuast system you should drive like you are off road while on the road to counter act the fact you are on the road ?

i gotta do some calculations.