On my former car I had the LMS exhaust installed, but it was a bit loud. Now I'm looking around to see if I can find anything with similar power gains but is just a bit less annoying (drone and such).

I know the JUN-TW has just recently hit the market but I was curious if anyone had any experience with it or were thinking about buying one.

Edit: Link: http://www.l-tunedparts.com/product/?id=2674

 

50+ views and no replies? Looks like no-one knows or cares about real performance modifications...surprise!

Let's see, would anyone happen to have some useful information about one of the 3 headers back exhausts on the market for your vehicle, like perhaps some independent dyno results? you could maybe even see a before and after?...Don't hold out too much hope: maybe you should ask some questions about some sweet rims or a sick new front lip... or how about a red out kit - or even some new tint instead... wouldn't you rather just change the outward appearance of your ride instead of actually providing some performance increase?

Whatever you do, DON'T ASK about t3h headers!!!!111!11!!!11!!!!1

 

I hadn't heard about this exhaust. It really does look interesting, but I wish they had a nice X-pipe instead of 2 Y-pipes in close proximity.

 

^^Why? Do you like the sound of x-pipes better?

Oh, in case you were confused, x-pipes don't do anything (readerformance increase) on a naturally aspirated v6 - their function is to create a scavenging effect from the exhaust pulses when you have one bank of cylinders firing twice in a row (like an american 90 degree v8). This effect isn't necessary on a v6 where the firing order goes L-R-L-R-L-R, etc.
A quality set of equal length extractor-style headers would be nice though. These would use a similar scavenging effect that is applicable to a v6 (and pretty much any) configuration.

 

If what you are saying is true, then this exhaust is a waste. I don't see any reason why a good axle-back with a modified stock mid-pipe (removed 2nd cats) wouldn't be as good if the X-pipe isn't beneficial. That's what I already have, and it only cost about $650. I don't see any reason to believe that splitting the mid resonator into 2 smaller ones would be better than the single stock resonator unless the X-pipe was better than 2 Y-pipes.

 

BTW, I believe we've seen that X-pipes, Y-pipes, or at least H-pipes do benefit the NA V6, since the only "true dual" pipe with no cats or resonators only made 6 rwhp.

 

I think that the twin resonators are mainly there for accoustics - the larger a resonator the deeper the tone. Also, not sure, but I think that the twin smaller resonators would allow for more sound reduction (dB) without an increase in backpressure.

As per your current setup - you are correct, I doubt that this system provides a significant gain over an aftermarket catback system with the rear cats deleted. If there is any performance difference between the two it would only come from the aftermarket part having smoother transitions/larger diameter piping than the stock setup.

I agree that this is not the best bang for the buck with sheer performance in mind, but; if all you cared about was performance/dollar, you wouldn't have bought a lexus, correct? You want something that offers the performance you want while still having the style and class that you would expect from a luxury vehicle. The twin center pipes should allow for simultaneously increasing flow while not having obnoxious noise levels - and without having to resort to a 3ft resonator that drones on the highway (LMS).

 

That doesn't necessarily prove that X-pipes make power - backpressure is vital for making power in NA engines no mufflers or resonators with too large of a pipe would lose power because there would be no scavenging effect.

Also - there is an X in this pipe, if you want to call it that - where the cat-pipes and the funky twin midpipes meet, there's only one flange. If that makes you feel better about it...

 

Where did you hear this? What is an "extractor" style header? Why do you believe firing order has anything to do with whether tying all the exhausts into a single pipe is effective or not?

I've never seen any evidence to support your claims, and I've seen a lot of evidence to the contrary with four, six, eight, and ten cylinder engines both two and four stroke.

 

Extractor style = equal length runners - sorry, it's an old school term my dad uses

It's not just my claim - the purpose of an x-pipe or an h-pipe, or any other crossover pipe you can think of is to equalize the exhaust pressure between two pipes in a dual exhaust - resulting in a smoother exhaust flow.

So, if you have some form of evidence showing that a crossover pipe ALONE makes a measurable performance increase on a NA v6 then by all means post it up.

 

sooo back to the point. if you're looking for an exhaust that removes the secondary cats doesn't have ugly cannon-style mufflers and isn't extraordinarily loud, is this it? if the price tag isn't as much a concern as the product? it has a pretty sweet sound and doesn't seem to have any design issues that would really give it a noticeable increase or decrease in performance from any of the other catbacks. from the pics of their headers the craftsmanship seems to be pretty good

 

No , maybe what the problem is that it's been covered over and over. Like you knocking the wheel threads/lip threads, you don't think the intake/exhaust section has been beat down over and over and over?? "which intake this, which exhaust that" .

5 post, shows you to be a noob at this forum. Why not lurk awhile and use your search button before jumping to conclusions (most of what you are concerned about has been answered already). What you are knocking in your comment has probably been beat less than exhaust/intakes.