I just got my jardine full exhaust in today and decided to list the differences between it and the V&H system. I have been running the V&H system for 8 months now on my 07f so I can directly compare the two.

First thing I noticed was the header pipes are bent so the oil filter can be changed on the F models with out dropping the system  .  WINNER: jardine

upon closer inspection I also can see the header pipes on the jardine are 1/16 smaller in diameter than the V&H; BUT they both have larger diameter pipes than the outlet of the head so there should be little-to-no flow reduction but better velocity with the Jardine.  WINNER: Jardine

Also the header pipes on the Jardine are longer (more velocity), but more bent, and not quite as equal in length. WINNER: 1/2 point for V&H

The y-pipe collector on the V&H is 1/4" (!!!) larger in diameter than the jardine. when you find the area of each the jardine is 3.14in² where as the V&H is 3.97in². After the headers the rest of the exhaust needs to have more flow than the headers combined (but not too much) so WINNER: V&H

The mid pipes are the same as the collectors so WINNER: V&H

What Really surprised me though was the mufflers, The V&H core is almost 1/2" SMALLER in diameter than the jardine. The jardine core is 2" (same size as the collector/mid pipe) whereas the V&H core is 1.5"ish (with a 2.25" mid-pipe/collector.) WINNER: jardine

And lastly the jardine is stainless, V&H is painted mild steel ( ) WINNER: JARDINE.

So the totals are:
Jardine: 4 Points
V&H:      2.5 points.

The V&H is very well built with excellent welds and bends but the tubing diameters are all over the place and its mild steel.

The jardine has excellent welds as well but the bends are slightly more crude (although still great) BUT its stainless steel  and accommodates the F models oil system.

As far as flow, I think the Jardine will win simply because of the larger Muffler core. the jardine should also have higher exhaust velocity (more low end power) because of the smaller, but still more than big enough, header pipes. If the V&H had a larger core it would out flow the jardine (and the heads) but kill the low end.

I will be installing the Jardine tonight (hopefully) so riding comparisons will follow.

These pipes have been dyno tested.  The Yoshi (no longer made) is best, followed by V&H, followed by everything else.  Equal length pipes is essential to designing a system that breathes as well as it can.  Changing your oil filter easily is nice but racers don't care about that.  A bigger can may be able to breathe better but if the engine doesn't require that much flow the point is moot and you only have a giant muffler.

Since I don't race I agree with you.  Jardine is best for this bike on the street.  I bought V&H because they're cheaper, I like the smaller can, and 5 more minutes to change the oil is no issue for me.

Since you have both systems I would love it if you had both tested on the dyno to confirm or dispel what has been done previously.

yeah test them, and then give me the V&H since we live in the same city after all!

I did dyno tune the gs with the V&H, lunchbox, and +6* timing advance. with the proper jets at a 12.8:1 afr 20-62.5-152.5 with one washer it ended up making 44whp, stock was 39whp.

Update: I got the Jardine installed a little bit ago and went for a ride. First the jardine is slightly louder than the V&H at idle and light reving but it much deeper toned than the V&H. I thought the V&H was deep but its nothing compared to the jardine. Then with high throttle and higher revs the jardine is MUCH louder than the V&H, also it keeps the same deep tone when the V&H becomes higher pitched at high throttle.

There is one but, The jardine is still brand new so it will probably change in sound slightly with some age, The V&H got a little deeper after 100 miles or so, so the jardine may become even deeper. maybe not. even if it gets slightly quieter it will still be louder than the V&H for sure.

In conclusion it looks better with the fairing to me (The V&H looks better on the naked models for sure though) and wont rust and accomodates the oil filter so its better to me. It also sounds better (I like loudness). I will however try to set up another dyno day to at least make sure the AFR is correct and see if there is any power difference.

Quote from: utgunslinger13 on June 09, 2010, 02:42:22 PM
yeah test them, and then give me the V&H since we live in the same city after all!

I already sold/shipped the V&H, sorry 

Damn, can't blame me for trying!

Quote from: black and silver twin on June 09, 2010, 12:01:26 PM

Also the header pipes on the Jardine are longer (more velocity), but more bent, and not quite as equal in length. WINNER: 1/2 point for V&H

I'm curious why this only got half a point, it seems like a pretty relavent issue to me.

Everyone always talks about this issue with changing the oil with the V&H but I've still never given it a second thought. I just let the oil run over the exhaust. It'll burn off as soon as I start the bike. Plus all you've gotta do is put something over the pipe the re-route the oil. I guess some people like their stuff to be cleaner than I do.

See and I think taking the V&H off is too easy to worry about.  I acn take it off and put it on in a few minutes.  But as TT said, let it drain and the heat cooks it anyway.

Quote from: tt_four on June 10, 2010, 08:10:32 AM

Quote from: black and silver twin on June 09, 2010, 12:01:26 PM

Also the header pipes on the Jardine are longer (more velocity), but more bent, and not quite as equal in length. WINNER: 1/2 point for V&H

I'm curious why this only got half a point, it seems like a pretty relavent issue to me.

Everyone always talks about this issue with changing the oil with the V&H but I've still never given it a second thought. I just let the oil run over the exhaust. It'll burn off as soon as I start the bike. Plus all you've gotta do is put something over the pipe the re-route the oil. I guess some people like their stuff to be cleaner than I do.

On the F models (at least mine) the filter wont physically fit in or out between the V&H and the engine. the F models have a different oil pan with a long banjo bolt for the oil cooler on the bottom, the filter fits out fine on the E models with the V&H.

Also it only gets half a point because the jardine takes away half a point from the V&H with its longer runners. After riding for an hour or so and going full throttle alot, I dont notice any seat of the pants performance difference, but we all know how inaccurate the Butt dyno is. 

Quote from: black and silver twin on June 10, 2010, 08:58:49 AM
Also it only gets half a point because the jardine takes away half a point from the V&H with its longer runners. After riding for an hour or so and going full throttle alot, I dont notice any seat of the pants performance difference, but we all know how inaccurate the Butt dyno is. 

Amen to the butt (and ear) dyno.  Any of these aftermarket systems make it sound like a race bike.  My bike came with a Cobra slip-on and stock pipes.  It was loud enough to wake the dead.  That's why I changed it.  After 30 minutes of riding my right ear was ringing.  I wanted something louder than stock but only about half as loud as what I had.  The V&H does just that.

A few more impressions about the jardine vs. V&H; first there is less engine braking than the V&H, my guess is more exhaust velocity and scavenging giving lower back pressure leading to less engine braking. Just a guess though 
And second top speed,  the top speed was 120, 2MPH slower tonight with the jardine than the V&H (It was 124 with stock wind screen, the zero gravity double bubble took it down to 122 with the V&H    ). Now on a gs500 2mph top speed difference could be less top end power, slight headwind, or God saying "no faster tonight". So I'm not sure why, but over the next few weeks I will undoubtedly top it out a few more times to test if its wind or not.
On a side note, it hit 120 faster than ever tonight, which leads me to believe that the Jardine makes more power under 10000rpm (120mph in 6th) and maybe less or the same above 10000rpm.

I have had the jardine on for a week (a few hundred miles) and the exhaust did change in sound slightly. It actually sounds almost identical to the V&H at idle/cruise but it is still louder under heavy throttle and slightly deeper at all rpm.

I picked up a Yoshi exhaust kit and found an unbelievable sound difference instantly after putting it together. I have not heard the Jardine or V&H.