Xoutpost.com - Stainless Exhaust E70

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Quote:

Originally Posted by Stebro PSD

Q. Are the pipes Mandrel bent?

A. Unless requested the pipes are NOT mandrel bent. It is more expensive to mandrel bend the pipes so as standard practice we don't but we can if requested, and a different price will be the result. Plus unless you’re building the vehicle for show or make HP gains over 500HP it’s not necessary. I also own a performance company dealing with Mitsubishi and have done exhaust testing, on most applications there was minimal to no difference in performance from mandrel bending unless you get close to 400-500HP. From my own personal testing I had an exhaust system that was mandrel bent and we just swapped out the mandrel bent center section (2005 Mitsubishi Lancer Ralliart) dyno-ed it before and after...no difference....we did get the gain and sound quality when we changed the muffler as the Stebro is a flow through design and best of all it no longer sounds like the average screaming tuner car out there....you all know what I mean.......

Q. What grade of stainless is used?

A. For the pipes we use 409 stainless. You will get surface discoloration but it will not penetrate the metal. The really shiny piping has higher nickel content and is brittle compared to the 409. The muffler is 304 stainless

Ok, let's make this clear:
-For a list price of $2500 you get non-mandrel bent tubing and 409 stainless for pipes?
-Just for comparison, the Eisenmann Race exhaust for the E70 X5 uses all mandrel bent tubing and 304 stainless on the entire exhaust and has a list price of $2437.37.

While I agree that mandrel bent tubing is not going to make that much of a difference performance wise, but at this price point we come to expect that level of thoroughness in the manufacturing process. Pressure bent tubing is what I would expect from my local muffler guy, not an exhaust manufacturer that is in the business of making exhausts for high performance cars.

Why use 409 at all? While I agree that 409 is only going to rust on the surface and has no affect on the integrity of the metal, wouldn't it be worth it to spend a little more and use 304 throughout the entire system? I would hate to show someone the exhaust that I paid $2500 for and have it be rusty. People like to see shiny muffler cans and piping, especially if they pay a huge sum for the product.

Here's an example of what 409 will look like after some use:
http://www.rebmw.com/Merchant2/graph...o/rust3_lg.jpg

Who wants to see that under their car? On the e70, you would definitely see the tubing leading from the can to the tips.

I would take a look at the aftermarket exhaust companies making exhausts for BMWs and see what they're producing for the same price, if not lower.

We use 409 for all production systems some don’t mind it. Many of or customers are not worried about the looks and 409 will be just fine.

Harold you’re absolutely right! I personally agree with you and I brought your concerns to the owner we can and will use 304 stainless and get the pipes mandrel bent for this group buy (or any systems bought on here) if that is what you want. Remember we are the manufacturer and can do just about anything when it comes to custom exhaust work

We have a standard practice in place but that does not mean it wont change to suit you needs and wants. Your input is great needed we have a fantastic product and with your help we can make it better....such as in this case.

The main thing is get the word out about our systems and please by all means voice your concerns we can and will make changes as our customer’s request.

This change won't affect the pricing. I will make the correction on the main post.

Tks Harold C

2 confirmed need 3 more…to get the ball rolling....wo wont be dissapointed I will see to that......there will be no CS issues or QC as it is my job and I will NOT let any system out the door without my personal inspection....

FYI all information will be kept confidential for privacy issues, well policy reasons.

Any Dyno testing planned?

Any drone at cruising speed?

Interior noise seems a little too loud for my taste.

Next local E70 we do we would like to dyno it, all depends on the customer. The interior noise is not bad from my point of view. It is not Muscle car loud and as mentioned you can carry on a conversation without raising your voice. We can customize your sound if you find it too loud. Our systems are free flowing but we can add a baffle to quiet it down if that is your preference.

Quote:

Originally Posted by 08WhtX5

Any Dyno testing planned?

Any drone at cruising speed?

Interior noise seems a little too loud for my taste.

Thank you all for your emails and PM's regarding QC and CS. Here is the link to our Ebay store, have a look an judge for yourself. We have a 100% rating that speaks for itself.

http://feedback.ebay.com/ebaymotors/...k&myworld=true

Brent

what the heck... might as well add you to my exhaust reviews...

PM me pricing info and i'll make sure you get the most honest write-up...

Thank you all for your responses. I just got back in town today Sunday April 13th 2008. I will be at the shop tomorrow to finalize the deals that you have inquired about. For thoes of you I have not replied to I will tomorrow morning and get your deals finished up....

-Brent

Ok I think I answered all the emails and pm's. If you sent either and did not get back to you please email me again and I will answer back ASAP.

As mentioned we will be doing our production run starting Monday April 21st 2008. I will post payment methods by tomorrow on the forum.

Thanks again for all your support you guys won’t be disappointed...

-Brent

Production starts today. I am still waiting to hear back from a few of you but production goes as planned. There is still time to get orders in as the assembly should take place mid week.

-Brent