Call me crazy but my 6mt feels a touch slower or maybe less torque after install. I actually kind of miss the distinctive high pitch of the stock exhaust. Don't get me wrong I like the sound of the Borla but the stock just seems to have such a unique sound. When a G is rollin' down the street you don't need to see it you know its a G from the sound. I have not reset the ECU yet. I will do that after I install the my 7 wire grounding kit this afternoon. Hopefully I'll feel the diff after that. Dose anyone out there feel the same way? Please give me some feed back and make me feel better about the coin I just spent.

 

Very common! What happen here is you lost some of that low to mid end power in place of some more top end pull, when you swapped exhaust systems. This is because the Borla allows for less backpressure, which to put it in simple terms, is neccesasry for that low to mid grunt.

The biggest mistake people often do when they shop around for an aftermarket exhaust system, is they automatically think dual is better. For high HP applications such as those engine using superchargers, nitrous and so on, this would make sense, but on a naturally aspirated engine, the exhaust system from the headers all the way to the tips, plays an important role on the vehicles power curve.

The borla, even though they call it the "True Dual" system is in a sense, not a dual system at all. It uses a two into one muffler, with dual outlet design. Compared to that of Stillens and Injen's, who use a seperate can for each bank of the system. Now I could be wrong, and that would be if Borla has split the internals of their muffler for each side of the block, but taking into consideration its small size and low profile, I highly doub't that's the case. If anyone could find that out, that would be great!

Anyhow, the trick when shopping for an aftermarket exhaust system is to really look into the manufacturer, who are they, how long have they been doing what they do, for what market have they been producing systems for, and read up their product history.

A system that balances both high-flow while still retaining just enough back pressure to keep the power smooth from idle and up, is what you want. This is probably THE MOST important factor, but I've yet to hear anyone ever mention it when they ask questions about aftermarket systems.

Now I hate to rip on Borla, but they've been going down hill IMO. I remember when Borla was producing some sweet systems! Fully polished, great tip designs, brackets and hardware that weren't off the shelf, and although you paid an arm and a leg for it, you got your moneys worth! Now take a look at the G35 kit. Honetly, can anyone not say that Borla simply bent some pipes, slapped their name on it, and said - here we go, an aftermarket system for the G35. I was not impressed with the systems over all quality, use of hardware, and the sound. It just doesnt live up to the Borla I use to know. Borla also claims what like 10+ HP, but what they fail to do is show any proof of such with a dyno chart. I would be willing to put money on the fact that this 10+ gain was probably near or at redline, with possibly a loss of power on the low end RPM range.

I don't mean to strike a nerve here, but this "loss of power" clain after installing the Borla is not the first that I heard of it. Does anyone have a dyno chart and can set the record straight?



"See, the problem is that God gives men a brain and a *****, but only enough blood to run one at a time."

 

OUCH!!!! Not what I wanted to hear but thanks for the time you put into your reply. What do you suggest I do from here? Return it? Or is there another upgrade I can make to get back the low end hp I lost. Do you even think they will take it back? I just installed it today.

 

OK in my panic I called Borla and they made me feel just a little better. I am still skeptical though. I was told that since this is a brand new install that the ECU has not adjusted yet. After resetting the ECU and driving 200-400 miles performance and sound should improve. I do plan on resetting the ECU after I install my 7 wire grounding/earthing kit later today. Borla also said that they don't take systems back. Not even if they are only a day old. So buyer be ware.

Guys please let me know if Borla if feeding me a bunch of bull.

Thanks

03' Black on Black 6MT
Bone stock and short some torque and a few ponies

 

You're about knee-deep in it - LOL

Ok sorry, I couldn't resist... Resetting your ECU may help a tad bit, but there's NO cure for the loss of backpressure. As for the sound, every "packed type" system will in fact open up a bit with some use, so yes the sound part of it may get better "deeper" but that's about it . . .



"See, the problem is that God gives men a brain and a *****, but only enough blood to run one at a time."

 

Ducatiguy, some of what your saying makes sense, and you have a nice car. But if your trying to say that the borla makes less hp than the stock, you better read up a little more. This exhaust puts at least 7or 8 hp to the wheels. Dyno proven. Maybe the same performance throughout the lower rpm's, but it definitely pulls at the top. Do you even have the y-pipe for your exhaust?

 

by the way, ecu reseting on manual cars is just a myth! doesnt do anything.

 

Where did you read that I mentioned, stated or implied the Borla makes LESS power than the stock system? Please point it out to me so I can take it back....

I'm sure the Borla produces more ponies than the stock system. That's NO doub't, but what I have said, and you obvioulsy have missed the point is WHERE is the power reached (gained) and is there a loss of power on the low end side of the RPM band?

Many people have stated that they feel a LOSS of "grunt" with their G's after they installed the Borla, so it would make sense to look into this. That is why I would like to see a Dyno chart of the Borla and compare it to a stock G. This way we'll be able to see if there is in fact a power loss, or if the power curve has been revamped from stock.

Most all aftermarket "performance" system pull at the top (less backpressure than stock = greater exhaust velocity) but a poorly tuned system, will rob low end power.

And yes, I recently got a Y-Pipe out of a Nismo system that I picked up from a friend, and resold as a two piece system...

I better get back to "reading up" now. . .



"See, the problem is that God gives men a brain and a *****, but only enough blood to run one at a time."

 

Ducatiguy, all I have to say is that U are DA MAN!!! You always say it like it is. What ever. I'll eat it. Its just $$$ I'll make more. You did not answer my ? about if there is a something I can do to work with the Borla and make the best use out of my purchase. Headers? OK , don't laugh how about www.electricsupercharger.com? It makes a whole lot of sense in theory. What I don't understand is why we've never heard about it. Thanks for your relpys everyone. Its so nice to have a place to go and get your questions answered. Or not.

 

I've heard this from several of my customers as well. Borla makes a great product, but I think this one was rushed to market (for other reasons).

Adding our equal-length, short-tube tuned headers should lift your gal right outta the doldrums. No losses across the RPM range, and 9-13 hp increase at peak.

$795 plus shipping for the full T304 stainless, less for the mild steel.

www.brmusa.com

www.brmusa.com

 

BTW, ducatiguy, your G is SWEET!

www.brmusa.com

 

Well since I prototyped the Borla, I feel as though I should chime in here. The exhaust for our car was produced in about a week's time. This however was not a rushed product as it was merely an extension of their 350z exhaust. David Borla told me it took about a month, give or take, to build the 350Z exhaust. The amount of flow that Borla is capable of is IMO not well suited for NA applications (although its not necessarly a bad thing either). As I am going for a SC in the near future, I think I made the right decision in going with the Borla (that and it was free along with headers ;P ) Borla is very free-flowing which means there is less backpressure thus a minimal gain in torque as well as decreased torque\HP in the lower RPM range (this can be said of the Injen and Stillen too I believe according to SportZ's 350Z exhaust dyno shootout). Like ducatiguy mentioned in another post, the Borla exhaust isnt breathtaking to look at nor does it have the best quality (come on guys, it's pretty cheap for an exhaust system as is so corners were cut) but I think it's a good exhaust for the money as well as one of the most free-flowing. With that, mods should be planned out in terms of future mods rather than just going out and buying random parts and hoping they all work well together (although to some extent this is necessary as the Z\G are new cars and new products are emerging as I type this so someone's gotta test different mod combo's right?)., In any case, to make a long story short, the Borla is good for the money you pay but only as good as what else you do to your car and what sound you want to hear it produce....my .02...

 

The Borla made power in my car everywhere... The sound and build quality is top notch... and this isn't on the 'butt dyno' lol it's on a really dyno...



Phil Petracca

 

A friend of mine have a Borla system on his 350z and to be honest it doesn't look nice at all. the material they used look so cheap and the sound was o.k.....just not for my taste. luxary cars need luxary parts not cheap looking parts.

 

Thanks for all of te replys. I still want to hear more and see some dynos. I'll just save up for the good stuff next time. You get what you pay 4.