JHM B7 RS4 Downpipe and Cat-Back Group Buy on Audizine

http://www.audizine.com/forum/showthread.php/529465-JHMotorsports-B7-RS4-2-75-in-Cat-Back-amp-2-75-in-Downpipe-Group-Buy!-Up-To-500-Off!?p=8513917#post8513917

That certainly sucks for me, placed my order less than 2 weeks ago.

Damn it. My New Year’s resolution was not to spend any unnecessary money on my car.

I think this just made itself “necessary.” ;D

Please contact us and we will give you a credit for the difference if we reach our goal of 10 units!

dam thats a cool move. +1 for JHM and doing that.

Another reason why JHM is boss ^

Do the downpipes give the car anytype of power gain? Do you have any same day 1/4 results with the same car, with and without the downpipes. Do you have any side by side comparisons of atleast 10 cars running the quarter mile and videos showing the down pipes providing any type of gain on these cars?

I’m guessing the downpipes provide more of a power gain than the catback. Going to 2.75" diameter and removing restrictive catalytic converters or going to hi-flow cats seems like it would let the engine breath more freely than putting catback on stock downpipes. I may be wrong though.

Not a same day thing but there’s 2000S4’s red RS4 that ran 12.2 here in Ontario on a cold day. IIRC Saki ran his 12.75 stock record on a cold day as well. Both on 94. Regardless of what correction you apply for weather, that’s a pretty big delta.

Edit maybe Saki and 2000s4 ran on that same day?

The day George went 12.2 I went 13.1. I was just brand new to the car so probably could have squeezed a 12.9 out of it in that weather. When I went 12.75 it was six months later in better conditions.

My mph was 106 and his was 112. Significant difference. He also had a tune though and catback.

I would estimate he was making 60 or so more hp than me. He didn’t dyno his car but Dan and some bother customers have and they were in the 360-370 range to the wheels on the 034 dyno (stock, carbon cleaned cars typically dyno 315 - 320 whp there. .

So pick up around 40-55 whp om a b7 Rs4, full catless exhaust, jhm tune, 91-93 octane fuel.

so what Im getting from this is there are no actual comparable times of a sameday car with all the same mods except for the downpipes. Also there arnt any proven 1/4 mile times of the same car with and without Downpipes?

So these downpipes don’t have any proven gains and are just a big waste of money from what I gather.

Show us some data where they added nothing vs stock downpipes and you might be on to something.

You’re right though there isn’t much data for just these downpipes stripped out. Only two cars hit the strip with them on so far (the two fastest pump gas na rs4s, they both ran 12.2). When they did there were no other similarly molded rs4s there on stock or other downpipes though.

Of course in the case of the Eurocode headers you sell for the b8, we have loads of comparable including two same day comparisons between header and non header tuned cars…which showed they do very little vs other downpipe/cat options. That’s good for the b8 community as they’ll be spared from wasting their money if they’re listening to the smarter members.

P. S. Think you’ll run 12.2 on pump gas? I’m betting no.

I guess not!

But when have down pipes ever been a waste of money? GTI, V8 S4, DSM etc etc. You’d be hard pressed to find a platform where you wouldn’t do down pipes as well as the exhaust.

WTF is wrong with you? Why do you turn every thread about a Eurocode Header hate thread? Either way I don’t know how you call a 30WHP increase a waste of money, more power to you, I hope your not like this in real life, would make life really tough. BTW I don’t sell headers or car parts, but I think I told you that before.

Probably to get under your skin.

Also, I would venture to guess that Mr. Saki will tell you he doesn’t care about how much whp are claimed to be gained by whatever heads or other item. Only real-word performance testing (ie 1/4 mile) makes a difference to him and many others. Dyno numbers are not really all that useful without a demonstrated correlation to increased performance, and are easily biased or manipulated (which I am sure you know already.) This is why it would be considered a waste of money, and I think was actually part of the argument you were making against the JHM headers.

Still, all things considered, JHM seems to have things going in the right direction, and I wouldn’t think it’s a huge stretch to believe that there are performance improvements to be had from their exhaust pieces since they have been pretty successful in just about every other area. Hopefully the supporting data will be forthcoming as people take delivery of the products.

+1 to JHM for offering to match the group buy price to others who bought before it was offered. Nice to see.

Ya saki likes to post bullshit to get under people’s skins.
Either way this thread isn’t about Saki, it’s about JHM’s exhaust.

Over $1000 for 2 pieces of piping that don’t do jack shit for these cars and don’t have any real world gains or any proven gains for that matter, only the truly daft and uneducated customers would buy them. Also $1750 for a cutback that really doesn’t do jack shit for these cars??? People are insane, and it’s straight criminal the way JHM rips people off on these exhaust systems.

Paper give it up man. You were attempting to do what people did with the headers discussion, and flip it here in the jhm downpipes discussion. Comments like the one I quoted are so patently fucking obvious.

We are not little kids here…

Then you follow it up copying primetimes criminal quote.

Are you pissed off that I knew what you were going to do before you got a chance to do it?

Why don’t you and your puppet master fuck off back to Audizine. Go on.

Although the approach may have some other shit behind it, you really can’t deny the ultimate question: where is the data that actually shows these exhaust components are performance adders? It could be dyno, or more preferably by most on here, real world at the strip. But your normal level of scrutiny around any new product is “prove it!”

Ironically, this product hasn’t proved it (unless I missed it in all the BS) yet you aren’t screaming bloody murder this time.

Providing actual data seems like the least you could expect when being asked to drop a grand or more. And I’m talking about before/after data on the same car with reasonably similar conditions.

You must’ve missed saki saying that he ran the 12.75 in better conditions than 2000s4’s tune+dp+exhaust 12.2:

If that isn’t good enough for you then all of the APR data must be garbage too. Sure they did a before and after tune with their in house RS5, but I struggle to believe they can install a whole exhaust and supercharger system for the RS4 at the track lol.

So fine. JHM doesn’t have the data you want. What product launch does satisfy your requirements?

Didn’t your friend dyno his car and show exhaust gains? Or was it with tune her dynod 360 whp. Dan dynod 360-370 whp. I am not sure what a tune only rs4 would dyno… Maybe 330-340 if the stock cars dyno 320? The biggest tune only gains we’ve seen on rs4 from Apr, epl, Bren, GIAC, we’re around 10-15 peak whp.

Jhm showed timeslips ages ago. Customers followed. (12.2 for two of them in fair da and on pump gas)

The results are solid. Not sure why anyone would scream bloody murder?

Jhm has made no claims about the power these parts add. Keep that in mind. Bloody murder is screamed when people boast of power gains and then the cars don’t seem to produce results that would corroborate those claims.

Jhm makes parts, shows acceleration results, and then leaves it up to you to decide if you want them. Sounds like you want a dyno or something? That’s not going to happen from the company. They recognize that the dyno can be manipulated so why bother legitimizing it? Force companies to show real world acceleration results and let the customers decide.

P. S. Since you have stated you will stay with stock downpipes and catback I can’t see why you care about these parts?

Let me take it further… If you and I are both tuned, have no other mods and you and I are going to race for $5000 (well et a pro driver to make it even) and all you could do is add a catback and downpipes to your car, what would you choose? (Knowing that I am going to house jhm which is sitting in my basement in a big box…). Honestly… What would you do?