So I just picked up a 2015 991TT and wanted to get an aftermarket exhaust. I've searched the forum and europipe seems to be the favorite. Heard videos on YouTube, it sounds OK. None of the options sounds exceptionally good but it seems europipe and sharkworks are the two I favor. Anyone in north NJ or NYC have either of these installed? I'd love to hear it in person !

 

I have EP. It's excellent. Good sound and awesome build quality.

If you want to hear PM me. I work in Nassau County and live on Staten Island.

 

Have you looked into Fabspeed? Theese have been becoming more and more popular, we even installed 2 systems in the past week! There is even one on the lift right now! The customers have LOVED them, we have customers all over the area that we could possibly set you up to hear!

Porsche 991 Turbo Product Line

 

You put sharkwerks and europipe in the same league? That is laughable.

Try GMG and BBI. If you don't like those 2 I'd probably pick fabspeed or europipe. I'd lean towards europipe since fabspeed quality is up in the air.

I still haven't heard a kline on the 991 so I can't comment on that.

 

Both Europipe and GMG have very solid reputations for quality. I am not familar with the BBI.


Due to exchange rates, EP is a little cheaper than GMG but I would not base my decision on that.


I actually did Goldrush Rally 7 with the owners of GMG and they are very serious about performance and racing. They are very saavy about modding our cars. And they race all the time. And they still hung with me even though my 991 TTS had a Europipe and not a GMG exhaust.

 

Thanks Scott. Maybe we can meet up at one of the next DFC events!

 

Could you explain why sharwerks shouldn't be an option? I don't have any opinion regarding any of the exhausts other than YouTube videos. Sharkwerks doesn't sound half bad, europipe also sounds ok. Couldn't find anything on Kline and the rest didn't sound too appealing, either the turbo spool was too prominent or the tone was too close to stock.

Had FVD on my 991S and it was ok, build quality sucked and the valve control never worked but the sound was amazing so it made up for it.

Have the fabspeed bypass pipes on my cayenne turbo and they work great. Quality seemed pretty good for simple downpipes from what in remember during the install.

 

I live in Union County NJ and would have no problem meeting up so you can check out my set up and hear the exhaust in person. Shoot me a pm and we'll set it up!

 

If turbo spool is a problem you probably won't like europipe, bbi, AWE, or GMG. Anything with 3 inches will have some turbo spool. Unless they use huge mufflers to suppress it. Therefor the europipe would be the closest. Sharkwerks doesn't because it still uses OEM cats, unlike the other companies. The cats compared to 200 cell really quiet down that turbo spool.

I just think the sharkwerks turbo exhaust is an after thought. Their GT3 stuff is amazing. The attractive part of sharkwerks is that it's the cheapest and simplest.

From videos the fabspeed doesn't seem to have a lot of turbo spool if any. I'd look into AWE as well. You don't want to change the sound too much. For instance if you look at capristo, it literally sounds like fire*******s or gun shots when you rev the exhaust.

I think maybe AWE and GMG don't have much either based on their videos. You shouldn't hear much turbo spool on the 991 anyways, the turbos are smaller.

 

J,
I would love to offer any assistance regarding the Kline Innovation system and extend my satisfaction guarantee and service. We have several configurations available to suite your needs and manifolds as well.







Cheers,
Sam

 

Sorry to post this HUGE bump here, but we were mentioned and I felt like I had to reply. Feel free to start a PM or email thread with me (alex@sharkwerks.com) but I felt like I had to at least respond with our thoughts since we were criticized pretty harshly by someone here.

I was honestly pretty surprised to read this thread. We spend a lot of time trying different exhaust designs, prototyping and testing on cars, and on fitment to make the product as trouble free as possible. Also we have offered a full, "no questions asked refund" to any customer that was not happy about the sound of their exhaust we sell them (even for 991 or 997.2 Turbo) and nobody has ever returned our Turbo exhaust for a complaint about the sound.

We made this exhaust for the 991 Turbo having learned from the 997.2 Turbo .. Instead of carrying on from the 996TT and the 997.1 Turbo, even if it worked, because the complaint people had was the new DFI engine was just too quiet. The 996TT and 997.1TT were a bit louder and this exhaust might be too loud on those cars, but we thought it worked well from day 1. Unfortunately from those Turbos which had integrated cats, people became familiar with replacing everything, and now people think they have to spend $5000 to make the car sound good and it's just not true.

Since the discussion here is about our Turbo exhaust, I'll be happy to elaborate and would love to hear your thoughts on a few things. We might make what appear to be simple exhausts, but we are all huge car fans and have been obsessed throughout our lives with the pursuit of automobile performance. We have our taste in exhaust notes and of course these will differ from other people, but generally people have commented only positively on our exhausts, even for the Turbo. It's something you have to hear in person and no video online ever tells the whole story of an exhaust.

Similar exhaust/engine on 991 TT:


Our 997.2 TT exhaust:

Similar exhaust design for GT2 (with other upgrades!) and RS:

Before I get into the design idea behind our exhaust, I want to say that no matter how an exhaust is designed for a Porsche Turbo, it will never sound like a GT3 or a naturally aspirated Ferrari etc. The engines' nature, being a flat 6, turbocharged and with a relatively low redline, forces a certain sound character that can never sound wildly exotic like a Carrera GT or F1 car, for example. If a manufacturer claims to emulate that sound with an exhaust, I would love to hear it in person and I would immediately offer it to my customers as an option and recommend it over our own products.

Realistically your choices are as follows when designing an exhaust for these cars:
1) Remove or replace the stock muffler and retain the factory emissions equipment (catalytic converters)
2) Remove or replace the stock muffler and replace the factory emissions equipment with high flow catalytic converters or straight pipes (aka, "test pipes")
3) Create a completely new exhaust with headers, cats (or "test pipes"), mufflers


I'll address each one of these quickly.

1) Remove or replace the stock muffler and retain the factory emissions equipment (catalytic converters). Example: Shark Werks, Akrapovic Slip-On

Advantages: 100% emissions legal. Will never cause a check engine light. 50-state legal (even California, New York) and legal in most other countries. Will almost certainly be more reliable long term, especially under track use, than replacing the cats. Dealer friendly "most of the time" - we send a large percentage of our bypass exhausts to Porsche dealers who prefer not to mess with the cats. Much cheaper than replacing the entire exhaust system.

When going this route there are two directions to take: Replace the muffler with another muffler or using a straight pipe. The straight pipe will always be louder, reduce back pressure for faster turbo response, and make more horsepower. The muffler will be quieter, in the case that the straight pipe is too loud this is an advantage.

Disadvantages: Stock cats could be a performance bottleneck. Might not be loud enough for some people. You will probably see some interesting data come out from EVOMS and others shortly. We have found that due to the way the ECU works (without tuning) on the 991 tt high flow cats are not yielding the same old advantages of old.

Comment: This is how we designed our system and the reason we went for a straight pipe is because when you keep the stock cats, it's not too loud by any means. It weighs less than a muffler. It reduces the price considerably. And it also gives a better tone (IMO) than muffling it further.

We opted for two mandrel bent tubes as it outflows any X or merge collector. We also retained the stock cats because with software tuning the car is SO fast anyway, I doubt the extra 10-15 HP you might see from high flow cats would be noticeable. If replacing the cats and using a straight pipe, the exhaust can be on the loud side.

We receive SO many calls about competing products being a smog problem. So many people email or call asking if we have a stock exhaust they can "borrow" because their 'ABC brand' exhaust won't pass smog. This is a major concern for us.

2) Remove or replace the stock muffler and replace the factory emissions equipment with high flow catalytic converters or straight pipes (aka, "test pipes"). Examples: Tubi, Cargraphic, Europipe

Advantages: Louder sound than stock cats. More turbo noise, possibly. Potentially makes more horsepower

Disadvantages: Not emissions legal. Not at the federal USA level and especially troublesome in states with emissions testing (especially California/CARB -- where we are based and sell the majority of these). More likely to have a check engine light (especially on 991TT) and long term, especially under heavy/track use, the cats tend to fail sooner. We've found this is the case with even the best cats. Much more expensive (up to 4x the price) than replacing the muffler only. Heavier (but only about 10-20 lbs, not a big # for these cars). The muffler creates a restriction in the exhaust flow (but not as much as the OEM cats probably do).

Comment: We offer these exhaust systems as well, and many people order and ship these to install on their cars. I prefer the European brands to be honest. High flow cats will make more power for sure, and the combination of straight pipe or super high flow mufflers and high flow cats or test pipes can give you some really cool sounds. But they also can give you drone or resonance, and might be too loud for some people. The primary reason we don't recommend these to most people is that their goal is to make the car sound good and not have to worry about the issues associated with replacing the cats. Bypassing the muffler accomplishes this for a fraction of the price and IMO, sounds about as good as any exhaust I've heard in person. There are differences that people should hear in person. For example the Tubi makes more turbo noise, but it's not as raspy or exotic sounding off boost.

3) Create a completely new exhaust with headers, cats (or "test pipes"), mufflers
Advantages: Same as #2, but you can also get an even better sound.
Disadvantages: Same as #2, but it's also even more expensive. The headers are another wrench thrown in the gears of emissions (by CARB for example it's yet another red flag for failing a SMOG test that's required every 2 years or you can't drive your car on the street legally).

Comment: I've heard these and to be honest I preferred the cat+muffler or stock cats+bypass sound. They tend to be overly loud, even more drone, and not much better sounding at WOT. It ends up being a series of tradeoffs and most people (customers of ours anyway) prefer the volume level of our bypass. Nobody's ever said "This is too loud!" and only a few people have said "This needs to be louder". That's our goal when designing any exhaust.

Cliff notes: We don't like exhausts to be too loud. We like to make simple solutions to offer people more sound with less headaches. We chose the design we did for a combination of performance and sound, and felt that bypassing the center muffler without replacing the cats any other way would result in less performance and an inferior tone. And finally, you need to hear an exhaust in person and perhaps live with it for a few days if you really want to know what it's like on a car. If you're building a race car and want maximum performance, remove the cats (your car will stink to all hell / kill brain cells when you're idling at stop lights) and put the nastiest exhaust you can find on the car. Anything between stock and THAT point is a compromise of some sort and always will be. Ours is just one choice (among many *great* exhausts) and probably not the best for everyone.

Again I don't want to detour this thread. If we want to talk about exhaust options and analyze different designs, let's start another thread... I only wanted to post my response here since we were called out directly.

 

I have the europipe and it sound great. I am in central NJ and am in NY a few time s a week if you want to hear my setup.

 

991 Turbo build thread! Check it out, this is the one that just left!

https://www.6speedonline.com/forums/...e-package.html

 

What is with the huge reply from sharkwerks? No one criticized you harshly. You guys use straight pipes without changing anything else, whereas other brands give you new cats, muffler designs, or pipe formations.

Nothing is wrong with that, that is the approach you decided to take. Doesn't mean the work that other brands do revamping everything like europipe, bbi, or kline, isn't in a different engineering league. They chose to go more complex, you went simple. But they aren't comparable to yours.

That is like comparing a basic ford engine to the porsche engine. One is simple, and one is complex. Both are great, but you can't compare them. That doesn't mean the ford engine is a piece of sh**. It just means the other one is better due to more advanced engineering. It cost more for a reason. These brands don't just arbitrarily price their stuff. There is a reason you guys only charge 1500. And it's not because you guys are doing us a favor giving us such advanced engineering at bargain prices.

Also not sure why you say other exhausts mentioned are not emissions legal. Kline, bbi, europipe, AWE, GMG, all pass emissions just fine. Also I've now driven in the car with a kline exhaust, I now have a bbi exhaust on mine, and I drove in someone else's car who had AWE. No drone in any of these 3.

 

Sadly they're not emissions legal with after market cats. California in particular where we are is strict on this hence we made a set up for keeping things smog legal for locals. We like and send some of the more expensive systems (tubi etc) to different parts of the world. Look at the designs of the 996tt and 997tt systems and you'll see everything is usually carried over. On those cars in particular using mufflers and or other methods to control sound made absolute sense since those cars were louder overall and especially more prone to drone... Using a straight pipe design with a high flow cat would make for a super loud and drones sound. The 997.2 and 991tt dfi engine is so much quieter that quite often a lot of folks end up going with cat less versions of these muffler exhausts as it ends up being too quiet and stock like otherwise.