[blackthought_]

Trying to see different exhaust options for my GT. When I got my GT, a mod that was popular was the GRP decat pipe and I really enjoyed the sound. Fast forward I recently installed a larini clubsport and while it does sound good, especially at low rpm, I’m looking for something with a little bit more umph.

For those that have the titanium exhaust from GRP, how does it sound in comparison to stock with a decat pipe? I’m looking for something aggressive but not obnoxious. It would be ideal to still hear the supercharger too.

I’ve seen the videos on GRPs website but videos often don’t do exhausts justice so I’d like first hand experience from those who have the exhaust. Would hate to spend all this $ to not smile every time I put my foot down. If there is one thing I miss about my amg GTS, it’s the exhaust sound.

By the way, If I decide to go down this route and get the titanium exhaust, I’ll end up selling the larini exhaust so let me know if interested. It fits the 400/GT I’ve been told.

 

[ShadowWulf369]

While I can’t speak to the titanium exhaust or the sound of the Larini on a supercharged Evora, I really love the sound of the Larini. I should mention two things. One is that for the S1 Evora, there was a version 1 and version 2 of the exhaust from Larini when it came to the valved Clubsport and mine is the version 1. In all photos I’ve seen of the exhaust, the bypass tube is routed through the canister and on mine the bypass tube is just that, a bypass to the other side of the exhaust. My version 1 was apparently too loud (?) so they made the version two a little more quiet. The second thing I should note is that right after changing my exhaust, I didn’t notice that big of a difference after changing from the stock exhaust. It was after the exhaust was used for several hundreds of miles that it seemed to “wake up”. And I’ll stick by my story that I think my car sounds exactly how I want it to (with all three cats), but it might be too tame for some.

The titanium exhaust is quite the expensive jewel and I don’t think I’ve heard an Evora with a titanium exhaust, but I can’t imagine that it would sound all that different from the stainless steel version that Greg sells. I would guess that the weight would be the main selling point, followed by the appearance since titanium changes color in a fantastic way when it’s heated by the exhaust. Hopefully someone with more sound exposure chimes in, but my 2¢ is to let the Larini break in and see if the sound changes after driving it for a bit.

Pic of my exhaust for reference (note the bypass around the canister)

 

[blackthought_]

While I can’t speak to the titanium exhaust or the sound of the Larini on a supercharged Evora, I really love the sound of the Larini. I should mention two things. One is that for the S1 Evora, there was a version 1 and version 2 of the exhaust from Larini when it came to the valved Clubsport and mine is the version 1. In all photos I’ve seen of the exhaust, the bypass tube is routed through the canister and on mine the bypass tube is just that, a bypass to the other side of the exhaust. My version 1 was apparently too loud (?) so they made the version two a little more quiet. The second thing I should note is that right after changing my exhaust, I didn’t notice that big of a difference after changing from the stock exhaust. It was after the exhaust was used for several hundreds of miles that it seemed to “wake up”. And I’ll stick by my story that I think my car sounds exactly how I want it to (with all three cats), but it might be too tame for some.

The titanium exhaust is quite the expensive jewel and I don’t think I’ve heard an Evora with a titanium exhaust, but I can’t imagine that it would sound all that different from the stainless steel version that Greg sells. I would guess that the weight would be the main selling point, followed by the appearance since titanium changes color in a fantastic way when it’s heated by the exhaust. Hopefully someone with more sound exposure chimes in, but my 2¢ is to let the Larini break in and see if the sound changes after driving it for a bit.

Pic of my exhaust for reference (note the bypass around the canister)
View attachment 1335607

Interesting. You know I’ve heard that Larinis get louder over time too actually. Now if only I could only grow some patience to break it in over a few hundred miles! The videos on the titanium exhaust sound wicked. And, just by sheer design almost look like straight pipes. The larinis look a lot more like your traditional exhaust

 

[mikhro]

It’s loud but not obnoxious. The closed valve position barely made a difference, so if you really want a “quiet” mode, it ain’t happening like the factory one.
There is some drone when cruising, you have to play with the correct speed and gear in order for the drone sound not to get overwhelming.

 

[blackthought_]

It’s loud but not obnoxious. The closed valve position barely made a difference, so if you really want a “quiet” mode, it ain’t happening like the factory one.
There is some drone when cruising, you have to play with the correct speed and gear in order for the drone sound not to get overwhelming.

Got it. You had the titanium or the stainless steel exhaust? Wondering if the only difference is the weight. By the way, did you lose the supercharger wine given the increase in sound?

 

[Node]

Pic of my exhaust for reference (note the bypass around the canister)
View attachment 1335607

Wait, how does this work? The bypass is always open and the cannister gets blocked off? This is backward. I have built several good working valved exhausts before. What you would get here is maybe slightly more flow when the valve is open but not a lot of change in exhaust sound. Also, the flow path for the "bypass" is the one with the odd angles. It should also be the other way around. You want smooth flow for your loud high performance mode and odd ugly angles for the quiet mode to help create reflections and break up exhaust pulsations. You know, to muffle sound. You have essentially two 90° angles for your high flow mode.... not good.

Some of those welds are NICE but the more I look at the design of the above muffler the more issues I find with it. For example the actuator is basically sitting in an oven where it is located between the cannister and the bypass. That is a rubber diaphragm and will fail when exposed to excessive heat. Or in this case lack of cooling. Maybe not right away but it will fail. You could possibly put some thermal blanket on the adjacent pipe and cannister to help.

 

[TJBNJ]

Trying to see different exhaust options for my GT. When I got my GT, a mod that was popular was the GRP decat pipe and I really enjoyed the sound. Fast forward I recently installed a larini clubsport and while it does sound good, especially at low rpm, I’m looking for something with a little bit more umph.

For those that have the titanium exhaust from GRP, how does it sound in comparison to stock with a decat pipe? I’m looking for something aggressive but not obnoxious. It would be ideal to still hear the supercharger too.

I’ve seen the videos on GRPs website but videos often don’t do exhausts justice so I’d like first hand experience from those who have the exhaust. Would hate to spend all this $ to not smile every time I put my foot down. If there is one thing I miss about my amg GTS, it’s the exhaust sound.

By the way, If I decide to go down this route and get the titanium exhaust, I’ll end up selling the larini exhaust so let me know if interested. It fits the 400/GT I’ve been told.

I put the GRP titanium on over the winter and have yet to have the car out.....and with the current weather in NJ, that's going to be a couple more weeks. I can give you my thoughts when I pull the car out for spring. Prior I was running the decat and stock exhaust, now decat and GRP titanium. Intake is just and AEM dryflow.

 

[friss]

Can't compare to stainless but agreed with @mikhro. The valve really just changes the tone at idle (little deeper when open) and slightly less volume. Can drone depending on the speed you are cruising at.

Screams nicely on the track though

 

[FlatCrank]

Completely agree with @mikhro Fantastic sound 90% of the time. Will drone in a higher gear under load. You will lose Stealth-ness.

Huge weight savings. Quiet mode in Ti is about the same as Loud mode of stock when not in the throttle. When you're on it, the Ti is delicious!

I can and do swap out the Ti with my OEM if I'm taking a long GT drive over a couple days, especially with the wife. I can swap them out in about 1-1.5 hrs including getting the car up, panel off, exhaust out/in, back together and down. Not too bad and not a big deal to me. Weight savings is about 30 lbs. Yes, I do also have the GRP decat pipe.

 

[blackthought_]

It’s loud but not obnoxious. The closed valve position barely made a difference, so if you really want a “quiet” mode, it ain’t happening like the factory one.
There is some drone when cruising, you have to play with the correct speed and gear in order for the drone sound not to get overwhelming.

I think I’m OK with that. I almost never have quiet mode on now anyway. The only thing that kind of concerns me is the level of drone. I once bought a fab speed cup exhaust for my 996 a few years ago and my god the drone was so bad I couldn’t hear myself think. I hope that’s not the case with the TI

 

[blackthought_]

Completely agree with @mikhro Fantastic sound 90% of the time. Will drone in a higher gear under load. You will lose Stealth-ness.

Huge weight savings. Quiet mode in Ti is about the same as Loud mode of stock when not in the throttle. When you're on it, the Ti is delicious!

I can and do swap out the Ti with my OEM if I'm taking a long GT drive over a couple days, especially with the wife. I can swap them out in about 1-1.5 hrs including getting the car up, panel off, exhaust out/in, back together and down. Not too bad and not a big deal to me. Weight savings is about 30 lbs. Yes, I do also have the GRP decat pipe.

90% is nice! Did you lose your supercharger wine since the exhaust sound is louder? Can you compare the TI to another car? (I really miss my AMG GTS exhaust note). I hear the TI has an exotic note to it

 

[ShadowWulf369]

Wait, how does this work? The bypass is always open and the cannister gets blocked off? This is backward. I have built several good working valved exhausts before. What you would get here is maybe slightly more flow when the valve is open but not a lot of change in exhaust sound. Also, the flow path for the "bypass" is the one with the odd angles. It should also be the other way around. You want smooth flow for your loud high performance mode and odd ugly angles for the quiet mode to help create reflections and break up exhaust pulsations. You know, to muffle sound. You have essentially two 90° angles for your high flow mode.... not good.

Some of those welds are NICE but the more I look at the design of the above muffler the more issues I find with it. For example the actuator is basically sitting in an oven where it is located between the cannister and the bypass. That is a rubber diaphragm and will fail when exposed to excessive heat. Or in this case lack of cooling. Maybe not right away but it will fail. You could possibly put some thermal blanket on the adjacent pipe and cannister to help.

Sorry to hijack the thread. Yes, the bypass valve is open for regular mode and closed for sport mode. I’ve had the exhaust on the car for 8 years and about 43,000 miles. The valve still works, but it does squeak when it actuates when cold. I can’t speak to how efficient the design is, but mine was version 1 and I’ve never seen another photo of this exhaust with my setup. I like the way it sounds and it keeps on doing what I ask. I figure I’ll keep using it until that changes.

 

[agentdr8]

Sorry to hijack the thread. Yes, the bypass valve is open for regular mode and closed for sport mode. I’ve had the exhaust on the car for 8 years and about 43,000 miles. The valve still works, but it does squeak when it actuates when cold. I can’t speak to how efficient the design is, but mine was version 1 and I’ve never seen another photo of this exhaust with my setup. I like the way it sounds and it keeps on doing what I ask. I figure I’ll keep using it until that changes.

Design and efficiency concerns aside, I would probably prefer the V1 you have to the V2 I have. It's too quiet for me when not bypassed. Coming from a Plack-style straight pipe, I was just looking for something with better tone and no drone, but was hoping to keep that rumble at idle.

 

[mikhro]

Got it. You had the titanium or the stainless steel exhaust? Wondering if the only difference is the weight. By the way, did you lose the supercharger wine given the increase in sound?

Yea titanium. Supercharger sound does fade a little now that you have a louder exhaust but if you step on it, you will hear whine.
At first I thought I made a mistake because I wasn’t used to the car being that loud compared to stock, but after a couple of drives it becomes natural and you don’t even notice.

Like @FlatCrank said, you will lose stealth-ness.

 

[2011 chrome orange]

Sorry to hijack the thread. Yes, the bypass valve is open for regular mode and closed for sport mode. I’ve had the exhaust on the car for 8 years and about 43,000 miles. The valve still works, but it does squeak when it actuates when cold. I can’t speak to how efficient the design is, but mine was version 1 and I’ve never seen another photo of this exhaust with my setup. I like the way it sounds and it keeps on doing what I ask. I figure I’ll keep using it until that changes.

I had the same set-up (but with the single tip) on my '11 S. It sounded great ,but I was looking for a little bit more out of it.

 

[ShadowWulf369]

Design and efficiency concerns aside, I would probably prefer the V1 you have to the V2 I have. It's too quiet for me when not bypassed. Coming from a Plack-style straight pipe, I was just looking for something with better tone and no drone, but was hoping to keep that rumble at idle.

I totally get that. Like I mentioned, I have all cats. But when I’m in normal mode with a warm car and exhaust, my car is very quiet when simply idling. It barks pretty quick if I tap the throttle in sport mode though! Also, I can’t personally take drone on the highway (my car is at 51,000 miles). I would be deaf by now if there was highway drone haha.

 

[blackthought_]

Yea titanium. Supercharger sound does fade a little now that you have a louder exhaust but if you step on it, you will hear whine.
At first I thought I made a mistake because I wasn’t used to the car being that loud compared to stock, but after a couple of drives it becomes natural and you don’t even notice.

Like @FlatCrank said, you will lose stealth-ness.

Got it. I’m not too concerned with losing stealth ness as we all know it’s hard to do that with lotus cars in general!

I’ve actually digged up the fab speed cup exhaust I had on my 996. Any thoughts on a comparison?

http://imgur.com/a/IKtfojK

A few minutes with that fab speed exhaust and I couldn’t hear myself think. Hoping the TI isn’t that bad

 

[FlatCrank]

I'm in CO so have a lot of grade changes/load changes. Going uphill/over a pass with the engine in sustained load, the Ti will wear on me with a drone. Dancing in the curves without the mundane hwy driving, I LOVE the Ti. Long hauls it wears on me and thus the OEM goes in for long/sustained trips.

I'm old but love the sounds. 3-4 hrs total drive time is my threshold when I start to want the OEM's "quiet mode" for a bit.

If wifey (or another less tolerant car person) is sitting passenger, it will wear on them after the thrill wears off or after about 30-45 minutes in my experience.

 

[joshualo]

Yea titanium. Supercharger sound does fade a little now that you have a louder exhaust but if you step on it, you will hear whine.
At first I thought I made a mistake because I wasn’t used to the car being that loud compared to stock, but after a couple of drives it becomes natural and you don’t even notice.

Like @FlatCrank said, you will lose stealth-ness.

Is this your experience with the Lotus Ti or aftermarket? Curious to know whether there's a difference in how they sound. thanks!

 

[Node]

Sorry to hijack the thread. Yes, the bypass valve is open for regular mode and closed for sport mode. I’ve had the exhaust on the car for 8 years and about 43,000 miles. The valve still works, but it does squeak when it actuates when cold. I can’t speak to how efficient the design is, but mine was version 1 and I’ve never seen another photo of this exhaust with my setup. I like the way it sounds and it keeps on doing what I ask. I figure I’ll keep using it until that changes.

I am glad you like your system and that the tone works for you. That is what is most important. I am not trying to derail the thread but people are complaining about drone etc... My point is that the system you showed was far less effective for sound change than the OEM configuration or any of the other offerings on the market for likely a higher price.

For a great example take a look at this overly simplified exhaust from TopSpeedAuto. Note that the LARGE pipe is the one closed off and the small, "quiet" restrictive pipe taps off of that. So, the high-flow configuration is the large smooth radius bend. With an active exhaust you want to be able to close off the LARGE FLOW pipe NOT the muffled pipe unless it is some sort of Helmholtz resonator (that clearly isn't).

Here's another example with a heat shield no less:

And finally another rendering from a LT forum member next to a forum members shot of the 400 exhaust:

I'm just trying to save the ears of other forum members. Buy a properly engineered exhaust and you can have the best of both worlds.