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Discussion Starter #1
hey guys,

I'm about the purchase a 06 Gransport. I've already listened to the stock exhaust and loved it! I noticed that the sound is really good at low rpms, but no sound at high. But the thing is I want something louder without replacing the stock muffler as I really like the tips. So, maybe just removed the resonator or cats and replaced them with x-pipe or???

I have no problem with ultra-LOUD exhaust whatsoever. I might want to make it as loud as it can get, but also not ridiculously loud(means that the sound is all over the place,there is no F1 tone or high pitch sound to it) . I also consider Mille Miglia muffler if replacing resonators or cats wouldn't help.

Hope u guys can help!

Thanks,
wyll
 

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Removing the X-Pipe isn't a good idea for performance reasons, the GS doesn't have silencers, Removing the Pre-Cats presents many problems as well. Mufflers are the way to go. Check out the Larini Systems exhaust, we are the US Dealer for Maserati. They've got a great sound. The Kreissig is quite a system as well but very costly. We can also offer X-Ost Systems. Really there are quite a few good options these days. Give us a call if you want to learn more about what's out there.
 

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I heard that the X-Ost has a valve kind of like the original GS exhaust. Is it true? If so, what would be the difference between X-Ost and Kreissieg?
 

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Discussion Starter #8
Formula dynamics:

Any vids of the x-ost system? how much is it?

Buzz48317:

Thanks for the link. I've known kreissieg for long time but always think its too costly...:mad:
 

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can you elaborate the points on the x-pipe and pre-cats?
The X-Pipe allows for an accelerated exhaust flow which improves scavenging and allows more room in the cylinder for the next charge or air / fuel. The force created from "sharing" the exhaust flow from the other header in the x-pipe literally helps to create a vacuum that sucks the spent charge from the cylinders. This usually nets between 6-13hp and improves torque as well. From our experience you will lose power and there is no reason not to have them.

Another advantage is that it improves the sound of the exhaust by sharing the noise from the (2) banks of 4 cylinders in each pipe as opposed to the noise of only (2) independant pipes with 4 cylinders each. It's been said that this process also reduces cabin noise, but I have not witnessed that.

I know that many believe that removing everything to create a nice unobstructed straight pipe is the way to go, but this is very old school thinking. Exhaust is a bit trickier than that.

The problems with removing pre-cats are more related to emissions and throwing check engine lights. Both of these will keep you from passing your next smog test and selling the vehicle. Not to mention that it really does pollute quite a bit more. If you do want to go this route, I would say that changing over to aftermarket hi-flow cats may be a better answer.
 

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The information that I have about the X-OST leads me to believe that it is a very high quality product and current owners are very happy. I have not seen a Kreisseg in the flesh... er metal. However I'm sure that you're getting a quality exhaust there as well. From what I've heard the Kreisseg produces a very unique sound, but it is VERY loud.

If enough guys are interested perhaps we can work on a Group Buy for the X-OST, otherwise just contact me for pricing.
 

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Discussion Starter #12
Group buy would be good! anyone...Do u have the x-0st videos by any chance??

Somehow I couldn't look up Quicksilver stuff for maserati, can anyone give me the link?? that'd help a lot!:)
 

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Group buy would be good! anyone...Do u have the x-0st videos by any chance??

Somehow I couldn't look up Quicksilver stuff for maserati, can anyone give me the link?? that'd help a lot!:)
I can tell you from experience that too be has horrible resonances and I am taking mine off. People call that a performance muffler?

The Quicksilver is an option but due to the terrible $ exchange ($2.09 for one British pound) it's very pricey.

I have their web site address on my office computer I can tomorrow post.
 

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Personal experience

My car was used as the test fitment for the new Fabspeed system. Previous system was straight pipes out the back, no mufflers. Sound was deep and throaty, nothing really high pitched. The CC has a center x-pipe resonator that is different than the GS, it's a little quieter.

The Fabspeed system starts with the Cat bypass pipes. This replaces the secondary cats, and because it's behind the O2 sensors remains emissions legal and no check engine lights. The new system sits about 2" lower than the stock because they replace the flat/smushed stock piece that is pressed up against the steering rack with a unchanged, mandrel bent piece. It comes with a small adapter piece to lowers the heat shield for the extra clearance. The car's clearance isn't effected because this is at about the centerline of the wheel.

Second piece is the X-pipe replacement. It's a true straight through "x" pipe with no sound muffling. Fits in stock.

System ends in their sport mufflers, fits like stock.

I still get the deep, throaty V8 sound, but now on crisp downshifts and more than half throttle I get a higher pitched, traditional Ferrari sounds (friend has a 360 CS and it's 90% of that sound at WOT). It's still possible to get down the residential streets at night, or past cops, without being too loud and drawing attention. The sport mufflers have two stainless tips out either side, so the look still remains somewhat stock looking.

The did a few tests with different combo's since each piece of the system is sold seperate and works with the stock system. There's a VERY noticeable increase in power when replacing the stock cat bypass piece. 10-15 HP is a good estimate, but more importantly, it give more low end torque, sooner, and smooths out the flat spot around 4k RPM. The car went on the dyno for pre-fitment baseline, just waiting for dyno schedule to open up and weather to cooperate (was hoping for this week, but probably early next week). I'll be posting results as soon as I have both dyno charts.

Another customer came in and put the first two pipes (cat bypass/x-pipe) on and kept the rear Tubi mufflers. Comparison was close, but the sound was a little louder, almost "tin-y" sounding at WOT.

Regardless of what mufflers you end up with, I'd HIGHLY recommend the cat-bypass piece, it's worth every penny in performance!

There's a video up on the Fabspeed site (www.fabspeed.com) of my car doing a few test passes, but the reality is the sound is a bad representation of what you hear in real life, so it's almost a waist of time listening to it.

Usual offer stands, if anyone is in the Philly area, feel free to stop by and experience it in person, just send me a PM
 

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Group buy would be good! anyone...Do u have the x-0st videos by any chance??

Somehow I couldn't look up Quicksilver stuff for maserati, can anyone give me the link?? that'd help a lot!:)
I have the x-ost mufflers with valves like the stock GS system. If you do a search on the site under "x-ost "you will find pics and information. I have been meaning to shoot a video, but have not had time. I will see what I can do in the weeks ahead.
 

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Group buy would be good! anyone...Do u have the x-0st videos by any chance??

Somehow I couldn't look up Quicksilver stuff for maserati, can anyone give me the link?? that'd help a lot!:)
got the X-OST x-pipe + tubi... the combo qualifies as ultra loud not something you'd want to do. My maser sounds like a dodge ram pickup truck. Going back to stock muffler...we'll see...
 

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got the X-OST x-pipe + tubi... the combo qualifies as ultra loud not something you'd want to do. My maser sounds like a dodge ram pickup truck. Going back to stock muffler...we'll see...
Sorry to hear you aren't pleased, especially after all the trouble we went to getting the money wired. I'm thrilled w/ the x-ost valved mufflers (the best of both worlds). One of the problems I noticed w/ tubi is that the performance version follows the same basic design as stock. The pipe enters from the side of the muffler case and dead-heads before being forced to make a hard 90 degree turn. This adds resonance and restriction. The pipe enters the x-ost on the back side and when open - goes straight through. The only resonanace I have is a slight amount between 2-2400 rpm. Several other manufacturers have a similar pipe orientation.
 

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Sorry to hear you aren't pleased, especially after all the trouble we went to getting the money wired...
it was troublesome indeed, I still haven't got a clue how that transfer went though :) I am not all that unhappy about the new part, especially after I carried the old resonators to my trunk. that sucker was heavy. my guess is that the new pipes are bigger in diameter than the older ones some of the member have purchased in the past and they produce much louder and lower sound. I was expecting higher and faster notes. Adding tubi into the mix didn't help so... next stop is to swap out the tubi and see how that plays out. If you think people look and stare at your maser on the road. try my combination, I had kids screamming giving me thumbs up and dirty looks from housewives in their merc. it's been fun :D
 

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Discussion Starter #19
haha:
what setup are u using?
 

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Hi all, i am also looking for aftermarket exhaust systems for my Maserati MC Victory. The car produces a wonderful bassy sound at low revs. However, as the rpm crosses the 3K mark, there is simply no sound from the exhaust anymore.

The options that I have considered are as follows:
1. Larini exhaust
Both the backbox and the centre section
2. Quicksilver exhaust
Supersports system
3. Tubi
Some complain that there is too much of cabin resonance.


Appreciate if there are any owners fitted with these exhaust systems post their comments
 
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