Exclusive HKS Lotus Elise/Exige Exhaust System - LotusTalk - The Lotus Cars Community
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post #1 of 33 (permalink) Old 10-08-2009, 08:01 AM Thread Starter
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Talking Exclusive HKS Lotus Elise/Exige Exhaust System

Exclusive HKS Lotus Elise/Exige Exhaust System



HKS designed this exhaust with a few criteria in mind, killer looks with the rear fascia in place, improved exhaust tone with minimal highway drone and respectable horsepower gains within that criteria. Through the use of a properly sized tuning tube they were able to increase the volume of the exhaust without increasing the tendency to have drone while at highway speed. A brief explanation of this portion of the exhaust is to cancel out unwanted tones in specific frequency ranges. Think of it as mechanical noise cancellation. Even with this additional technology being applied to the exhaust system it is still 47% lighter than stock.

Noise Cancellation Chamber


Rear Picture Uninstalled



Rear Tips


Ultimately, this exhaust works! We had an independent test with a customer of ours who has a VF Stage 1 kit he gained 7 hp by just bolting the exhaust on the car, while retaining the factor catalytic converter. Impressive!

Dyno Plot


Exhaust Installed



MSRP: $1595 Special Pricing $875 Shipped

To place an order call 240-243-0193 or email [email protected]

Thanks,

Jermaine~

www.VisionFunction.com - Site Under Construnction - Stay Tuned
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post #2 of 33 (permalink) Old 10-08-2009, 10:34 AM
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Any plans to have them develop a version with the exit above the diffuser?

In theory, there is no difference between Theory and Practice. In practice, there is. - Y. Berra
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post #3 of 33 (permalink) Old 10-08-2009, 10:41 AM Thread Starter
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Originally Posted by luxige View Post
Any plans to have them develop a version with the exit above the diffuser?
I can see what I can do, they are pretty reluctant to makes these as it is. I wouldn't be surprised to see there go away after this batch.

www.VisionFunction.com - Site Under Construnction - Stay Tuned
 
post #4 of 33 (permalink) Old 10-08-2009, 10:49 AM
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Originally Posted by [email protected] View Post
I can see what I can do, they are pretty reluctant to makes these as it is. I wouldn't be surprised to see there go away after this batch.
They look great - just curious though...

A) why were they reluctant to make these?
B) if they already invested the time/money to design these so well, why would they only make one batch?

2008 Lotus Elise California Edition - Red
1998 Volvo S70 T5
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post #5 of 33 (permalink) Old 10-08-2009, 10:52 AM Thread Starter
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Originally Posted by MikeLeuz View Post
They look great - just curious though...

A) why were they reluctant to make these?
B) if they already invested the time/money to design these so well, why would they only make one batch?
It's all about sales volume. Figure it this way, if it sells well then continue with production and possibly development.

C'mon HKS Exhaust for everyone!

www.VisionFunction.com - Site Under Construnction - Stay Tuned
post #6 of 33 (permalink) Old 10-08-2009, 11:13 AM
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ya no where near as many people are going to buy a through the diffuser stock looking setup, they should have came up with an above the diffuser exhaust first.
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post #7 of 33 (permalink) Old 10-08-2009, 11:24 AM Thread Starter
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ya no where near as many people are going to buy a through the diffuser stock looking setup, they should have came up with an above the diffuser exhaust first.
With that said I still have a few customers who are not into the above the diffuser look. So this is still a great option for the more subtle Elise owner.

After all we are all a bit different, but we all love to !

Jermaine

www.VisionFunction.com - Site Under Construnction - Stay Tuned
post #8 of 33 (permalink) Old 10-08-2009, 11:40 AM
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ya no where near as many people are going to buy a through the diffuser stock looking setup, they should have came up with an above the diffuser exhaust first.
Yea, just take a look at Jim's 2bular exhaust, he will make whatever you want ... Especially for supercharged engine like the VF II . Great exhaust, great service !!
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post #9 of 33 (permalink) Old 10-08-2009, 11:48 AM
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Sweet! That would look great with one of our headers
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post #10 of 33 (permalink) Old 10-08-2009, 01:56 PM
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Sounds very interesting. Is there anything more you can tell us about the quality of the sound and how much louder we could expect it to be? Does it provide any sputters or backfires (in a good way)? Is it a meatier/rumblier sound than stock? Cancelling out drone is good, but does that mean it is considerably quieter than most of the other after market offerings?

I realize that it is nearly impossible to answer these questions with words - it needs to be experienced. But, I am seriously interested and without the benefit of hearing it in person, any additional info is much appreciated.

Also, I am planning to install your Vision Function supercharger/intercooler. Is there any reason a different exhaust would be a better fit for this combination?

Thanks,
Todd

Last edited by Moto44; 10-08-2009 at 02:09 PM.
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post #11 of 33 (permalink) Old 10-08-2009, 02:14 PM Thread Starter
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Originally Posted by Moto44 View Post
Sounds very interesting. Is there anything more you can tell us about the quality of the sound and how much louder we could expect it to be? Does is provide any sputters or backfires (in a good way)? Is it a meatier/rumblier sound than stock? Cancelling out drone is good, but does that mean it is considerably quieter than most of the other after market offerings?

I realize that the it is nearly impossible to answer these questions with words - it needs to be experienced. But, I am seriously interested and without the benefit of hearing it in person, an additional info is much appreciated.

Also, I am planning to install your Vision Function supercharger/intercooler. Is there any reason a different exhaust would be a better fit for this combination?

Thanks,
Todd
Exhaust systems are really personal preference which is honestly why they have so many different models available. I will say the exhaust tone is very comparable to the Lotus Stage 2 muffler. My opinion is if you are a fan of the placement of the exhaust, the noise level will suit you perfectly.

As fas as exhaust combination's go I recommend going for the look that you like, then the sound, then the horsepower potential. Sometimes the noise isn't worth the exta 5-7 hp especially at the general power levels were are talking supercharged.

www.VisionFunction.com - Site Under Construnction - Stay Tuned
post #12 of 33 (permalink) Old 10-08-2009, 02:25 PM
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Thanks for the input, Jermaine.
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post #13 of 33 (permalink) Old 10-12-2009, 06:47 AM Thread Starter
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I should have a video up a little later on today.

www.VisionFunction.com - Site Under Construnction - Stay Tuned
post #15 of 33 (permalink) Old 10-12-2009, 07:25 AM
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According to HKSUSA, the OD piping diameter is 50mm.... which is less than 2" :O

Current: Nothing... looking...
Previous: 2008 Exige S240 Storm Titanium, Touring Package, Starshield, Cup Car wheels with R888, Arqray Twin muffler, Cup Car airbox, Nitron Double Adjustable suspension, Saikou Michi catch cans, Bride seat, HID headlights, Lots of track parts...
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post #16 of 33 (permalink) Old 10-13-2009, 08:29 PM
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dyno plot is not showing

** save ~10 lbs gain 1 hp ** EQ: Y=(190*X) / (1984-X) where Y is (HP) and X is (lbs)

'07 Lotus Exige S310


WTC 2
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post #17 of 33 (permalink) Old 10-13-2009, 09:21 PM
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On the HKS site it says it's for the NA Exige/Elise.
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post #18 of 33 (permalink) Old 10-13-2009, 09:29 PM
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I have one of these, EVERYONE I know digs the sound of it. The piping does neck down from 2.5". Worried me at first, hasn't seemed to hurt me though. I'll upload a sound clip from a recent trackday, i already have a video on youtube. My tips are sliiightly different, but other than that, everything looks identical down to the HKS badge. I've been happy with it, i know it's tough to choose w/o soundclips though.



Unloaded:
YouTube - Garage: Laverty Project Elise- Exhaust!

Loaded:
YouTube - PGP Trackday 9/24/09: Part 2- The Sloppy
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post #19 of 33 (permalink) Old 10-14-2009, 04:46 AM Thread Starter
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Originally Posted by Noizemaker View Post
I have one of these, EVERYONE I know digs the sound of it. The piping does neck down from 2.5". Worried me at first, hasn't seemed to hurt me though. I'll upload a sound clip from a recent trackday, i already have a video on youtube. My tips are sliiightly different, but other than that, everything looks identical down to the HKS badge. I've been happy with it, i know it's tough to choose w/o soundclips though.



Unloaded:
YouTube - Garage: Laverty Project Elise- Exhaust!

Loaded:
YouTube - PGP Trackday 9/24/09: Part 2- The Sloppy
Cool Vids.

Also Dyno plot link fixed. At the time the exhaust was initially developed the NA car was the only thing they had. With that said, not a bad horsepower gain.

www.VisionFunction.com - Site Under Construnction - Stay Tuned
post #20 of 33 (permalink) Old 10-14-2009, 06:46 AM Thread Starter
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Having Video probs..

VF Stage 1 & HKS Exhaust - Fly by
YouTube - Vision Function Stage 1 Lotus Elise with HKS Exhaust

Standing Start
YouTube - Vision Function Stage 1 Lotus Elise with HKS Exhaust

www.VisionFunction.com - Site Under Construnction - Stay Tuned
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