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Discussion Starter · #1 ·
As some of you may know today I went up to JabbaSport so that Jetex could test their prototype exhaust on my car, and the day will be covered in a feature in the April issue of Volkswagen Driver magazine.

So I arrived at JabbaSport at around 10am and took a few pics of the cars that were about [:p]

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Then I met Neil from Volkswagen Driver and Neil from Jetex and a few of the guys at JabbaSport, all top guys by the way [:p]

Neil (Jetex) got the exhaust and I took a few snaps.

The cat-back system is not a prototype part it has been in production for some time, the new downpipe and sports cat is what we're really interested in today.

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Obviously we did not use all the parts shown... the first pic shows the cat back and has both the silenced and non silenced front pipe for comparison. The system is 2.5" bore.

The downpipe picture also shows a 3" non silenced front pipe but we did not fit this at all in the end.

The downpipe is 2.5" and is one piece with a 200cpsi sports cat. I guess this makes it comparable to the Milltek "Ultra" cat which I believe is the more expensive one piece 200cpsi dp/cat.

So firstly we put my car on JabbaSports new rolling road which seems like a top bit of kit. We did runs with the Revo both turned on and turned off. Im only going to talk about the runs with Revo on as its the most relevant to me, the standard runs will be printed in the magazine im sure. This is Revo Stage 1 by the way.

We did 2 Revo runs and the power and torque came out at 207-208bhp and 239lbs/ft. Pretty much spot on for a car with Revo and Carbonio I would have thought? So pretty happy with that [:D]

Here's a pic of Mike doing the rolling road business with my car (check out the fancy digi display on the comp [:p])

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After this James fitted the 2.5" cat-back with the silenced front pipe. Here's a couple of pics of stuff being fitted, I'm sure there will be plenty more in the magazine when it comes out.

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After this the car was put back on the RR to see if a cat-back system makes any difference. Average of 2 Revo runs gave 213bhp and 239lbs/ft. So we have a 5-6bhp increase from this cat-back, with no change in torque. Pretty good for just a cat-back!

Then we swapped out the silenced centre section for the non-silenced, and fitted the prototype dp and sports cat.

Here's a pic of everything done.

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We then put the car back on the rollers. Average of 2 Revo runs again gave us 223bhp and 259lbs/ft. So the full turbo back system has given me an increase of 15-16bhp and 20lbs/ft! Very happy with that, bearing in mind that this is with the Stage 1 Revo so further increase could be expected with upgrade to 4bar FPR and stage 2.

Before the usual comments about rolling roads etc, this was all done on the same day on the same rr in the same conditions, so even if the RR was out, the gains are still accurate.

I did 200 miles coming home after the exhaust was fitted so I can make a few comments about it. There is a hugely noticeable difference, the go pedal feels a lot sharper now thats for sure! The turbo spool up is noticeably quicker and more aggressive, finding it a lot easier to spin up the tyres in 1st, 2nd and even 3rd on certain roads! I was just saying the other day in another thread how I never get spin in 3rd. The exhaust has no front silencer so I was expecting it to be pretty loud, however when it was first fitted it seemed a bit quiet? I think it needs to bed in or whatever cos its noticeably louder now after 200 miles. The noise is deep and sporty but not chavvy at all, it has a subtle deep note on idle and when you're driving normally the exhaust isnt really that noticeable. The most important bit is that there is absolutely no drone whatsoever. I tested it out on the motorway cruising in different gears at different RPM's and I never got drone. When you're giving it some this exhaust sounds fantastic! Properly aggressive, it roars nicely [:D].

With regards to fitment I couldn't give Jetex more praise. Every part fit on perfectly without a hitch, bearing in mind this is a prototype downpipe and has never been on a car before, I was very impressed that it fit first time no worries. There is no knocking at all and we did not have to modify anything. The dp isnt even knocking/touching on the heat shield which I was expecting it to. Very very impressed.

With regards to JabbaSport, again I couldn't be happier. All the staff were very friendly and I enjoyed a few cups of tea courtesy of JabbaSport [:p] Got some good advice bout my car off the guys and had a good chat with a couple of them too. Mike took care of the rolling road parts and James was dealing with the exhaust fitment. I was very impressed with James exhaust fitting skills! He was extremely careful with my car at all times and also extremely thorough, just small things like checking all the bolts a few times and the way he carefully applied silicon lubricant to the exhaust joints so that the end was completely coated in it, cable tieing the lambda wires well out of the way etc... in general service I don't think you'd normally get at any old place.

All in all a great day! Sorry for the long post but hope its interesting to some of you [:p]
 

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Great reading. Looks good mate. I have heard very good things about Jabbasport and I guess this just backs it up.

Some great gains there and looks like some good kit too.

I had a Stainless Jetex system on my last MK3 GTI and that was a perfect fit system and sounded great, would love to swap my Miltek for a New Jetex system. [:(]
 

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Great reading. Looks good mate. I have heard very good things about Jabbasport and I guess this just backs it up.

Some great gains there and looks like some good kit too.

I had a Stainless Jetex system on my last MK3 GTI and that was a perfect fit system and sounded great, would love to swap my Miltek system on my MK4 GTI for a New Jetex system. [:(]
 

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I recently had my 18T back at Miltek for a whole day while they tried to sort out the annoying drone on the exhaust.......and whilst its better, its not right, even by their own opinion! Fair play to them for having a go, but "the quiet performer" it aint!

Wheras the Jetex on my mk2 is quiet as a mouse until you want it to be loud!

What size DP is that? What engine model is yours?
 

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Discussion Starter · #7 ·
It's an AUM engine and the dp is 2.5" as is the exhaust.

The cost for the cat-back systems is available on the website, they specialise in VW exhausts by the way:

http://www.jetex.co.uk/website/vwzone.php?mod=Golf+Mk4+(turbo)

The cat-back on my car is the 41-SH0DTR, and costs ?294 inc vat. They offer a number of tailpipes. The systems with the front silencer are a little more expensive, to be honest I would recommend having the straight through option which I have got, like I have already said, drone and generally excessive unwanted noise is not an issue with the exhaust, so no need to worry bout gettin the front silencer pipe.

I obviously can't give a price on the dp/cat as this is a prototype, but I will be in communication with Jetex so I will let you all know of any developments. I would say that it would be very competetively priced in line with the milltek ultra dp.

I also mentioned to Neil from Jetex about group buys and told him about the ICJ Performance GB where they were doin milltek catbacks at very competetive prices, and group buys is something Neil is interested in looking into so I shall keep you all posted on that as well.

It seems the tendancy on this forum is to stick with milltek, and to a lesser extent blueflame... but I definately reckon people lookin for a new exhaust should consider Jetex, especially the 1.8T owners, I've read numerous complaints about fitment and drone issues on the milltek exhausts, and I can honestly say that the Jetex system does not suffer from this whatsoever. Surely the droning issue must be to do with the back box silencer design, as my car has no other silencer in the exhaust apart from the sports cat. Maybe the Jetex back box design is better at silencing? Who knows.

I'm not entirely sure on this, but Neil did bring a 3" front pipe with him, so I'm assuming they also have 3" systems for those higher powered cars.
 

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Nice review, sounds like Jabba's rollers are a bit more accurate now? [;)]

I wonder if there are any plans to produce an Anni style tailpipe?
 

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Discussion Starter · #9 ·
They are new rollers and I would say they are accurate as my first rolling road run results before the exhaust was put on was spot on exactly what i expected.

Will ask Jetex bout Anni style tailpipe next time I speak to them, at the moment they do 2 different designs to fit v6 4motion valance and also some that fit under the original GTI valance but I don't really like that look.
 

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Discussion Starter · #10 ·
The provisional downpipe price is 350+vat. This is not the final price but it will be around this figure. The Milltek Ultra dp sells for 389+vat on awesome so i think this is well priced. They are going into production in 4-5 weeks and people who are seriously interested and what to be kept up to date, PM me and i'll keep you informed.

With regards to Anni style tailpipe, they have blueprints/prototype for this system but as demand is low it is not currently in production. If 5 or more people were interested then perhaps we could work something out.

Also Jetex are planning to offer the downpipe with a 100cpsi cat for cars with no post cat lambda sensor or with mapping that ignores the 2nd lambda probe eg Revo2 etc. Should release a few more hp/torque perhaps.
 

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I'd be willing to provide my Anni as a demo car if they want to prototype and test the fitment on a PD150 [;)]

I was considering a full Milltek turbo back (de-cat) but not sure now as i've heard a few stories about them being a bit boomy.

My car is totally stock apart from a remap.
 

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Discussion Starter · #13 ·
Cheers guys I will pass on your requests to Jetex. Hopefully all the balls will be rolling smoothly in a couple of weeks.
 

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I have been looking at adding a full system to my Toledo but Milltek as yet have not made a back box for the 20VT Toledo. I believe the Bora back box is similar but needs to be modified to fit the Toledo.

Do they need a 20VT Toledo for design purposes? There are a fair few people who have bought them and wish to add the back box but can't as there is not one available. I would travel down if possible. I believe the DP/Cat and front pipe is the same for the Leon as it is for the Bora/Golf which means it would be good for my car too.

Cheers,

Al
 

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Looking good, That Jetex system fits and looks nice, but a bit of warning... In the pic showing the centre section with the back not fitted, I can see a standard C exhaust clamp. Not impressed if Jabba have stuck these clamps on your new exhaust system! They are a nightmare and ever since I found out about Mikalor clamps I'll never go back! In a years time your clamps will be shot... Not to mention the fact they don't evenly spread the load etc.

This is what I'm taking about...

http://www.powerengineering.co.uk/mikalor/

Absolutely brilliant clamps... the type Jabba fitted are best at home on a Kwik-fit exhaust...

Just my 2p...
 

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Discussion Starter · #17 ·
Will get back to you regarding Toledo, I have mentioned it to them and they are looking into it.

There are no standard exhaust clamps left on the exhaust, Jetex supply excellent clamps with their systems as seen below:

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These clamps are fantastic.
 

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Yeah mate at least they look like stainless steel so shouldn't rust!

I just prefer the wider band clamping that the Mikalor provide. You can easily see how it provides a nice firm even pressure over a wider area than the type Jetex use.

My miltek was fitted originally with clamps similar to the Mikalor ones, but not stainless... They will all be replaced by the Mikalor ones...

The Jetex ones are just stainless verisons of the cheapy Kwik-fit and Halfrauds clamps IMO.

Looks like the Jetex exhaust is a bit different at the back and looks great on your motor.
 

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re mikalor clamps, surely spreading a load over a wise area makes it more likely to leak, ie less pressure on the sealing point?

I had a janspeed tubular manifiold on a car years ago and the "band" clamps they gave with it were just not up to providing enough pressure to make a tight seal. After several changes of clamp, I ended up with the cheapo looking u clamps, lasted three years, no probs/leaks!

I just replaced the jetex u clamsp supplied with my jetex stainless mk2 system, they did eventually fail and rust, but lasted 6 years and 57k miles on the MK2, so not too bad. Those look better quality ones than my mk2 exhuast ones to.
 

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Discussion Starter · #20 ·
The Jetex ones are really good the way they tighten and loosen is very unique and makes them a lot easier to use
 
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