Exhaust Options Index

[Gprodigy]

This should help for comparing exhaust options, I'll update with more videos as I see them pop up. Or just drop videos and info to help.

Reviewer	Cost	weight	Direct Link
STOCK	$0	Factory spec: 15kg (i4) 33lb 17.5kg (v6) 38lb	stock HD Lotus Emira - TRACK MODE EXHAUST SOUND! Test drive event at Secor Lotus in New London, CT.2023 Lotus Emira. Supercharged V6 with manual gearbox. Magma Red paint with black interior.Track Mode open... www.youtube.com compared to V12 lambo Stock Garage
Larini "pipes"	Cat delete pipe: $296.52 Full system: ~£1769 ($1,906.92) (site says call for inquiry)	N/A
MILLTEK + Valve Remote	Decat $285.00 £1,706.40 on Milltek $2,333.00 on GRP Remote: £270.00	N/A	full system in tunnel Yellow Lotus Emira S8HHN / AO72FFK on Instagram: "New @millteksport @milltekexhausts full system for the Lotus Emira, including OPF bypass. Video does not do this justice, overall noise is deeper, louder, no drone and definitely a better and smoothe 327 likes, 32 comments - yellowemira on September 23, 2023: "New @millteksport @milltekexhausts full system for the Lotus Emira, including OPF bypass. Video does not do this justice, overall noise is deeper, louder, no drone and definitely a better and smoother power band. It has begun... www.instagram.com Remote on OEM setup only Lotus emira V6 valves open exhaust sounds #lotus #lotusemira #modifiedexhaust www.youtube.com
GRP Stainless or Titanium	DeCat $249.00 $1,999.00 Stainless $2,499.00 Titanium	Exhaust system: weight from site SS: 22lbs T: 13lbs	Exhaust no video yet GRP 3rd Cat Delete w/ Miltekt Valve Controller​
Aerie Titanium	DeCat $399 $2,999.00 USD	Aerie Y pipe 11.0 lbs (2.1kg) Aerie titanium exhaust 13.5 lbs (6.12 kg) Decat pipe 1lb (0.45 kg)	View attachment 35896 View attachment 35897 View attachment 35898 View attachment 35899 View attachment 35900
3rd Cat Delete Super Sprint	$450	~weight reduction of 6.3kg (13.8891 LBs)	徐振 on Instagram: "LOTUS EMIRA V6 Supersprint Exhaust" 4 likes, 1 comments - alex_zhenxu on December 21, 2023: "LOTUS EMIRA V6 Supersprint Exhaust". www.instagram.com

 

[silent cilantro]

Great idea!

 

[GRP]

Great idea!
We will share videos asap with all of out options!

 

[Time2Fly]

Great! It might be good to add a weight and dB column as well.

 

[Tobiasz17azs]

rev monkey I believe he has a full system not just the pipes

 

[ADC]

Great idea for a thread

$296 for the Larini system sounds a bit suspect though...

 

[silent cilantro]

Great idea for a thread

$296 for the Larini system sounds a bit suspect though...

That’s just for the 3rd cat delete

 

[Tobiasz17azs]

That’s just for the 3rd cat delete

Yeah that’s what I said . On Larini website I can’t find the pricing for full exhaust system .

 

[Gprodigy]

Yeah that’s what I said . On Larini website I can’t find the pricing for full exhaust system .

same, I just put what their site had. I’ll edit it so that there’s a disclaimer

 

[EZcheezy]

another milltek example. this guy only has the box/axelback/silencer part. not the 3rd cat delete

 

[EZcheezy]

the price for the Lorini box/axelback/silencer part is £1769. found at the end of the revmonkey video

but need to inquire here:

Enquiry Form - Advanced Automotive Engineering

To enquire about a System, please fill in the form below. Please be assured that your personal information is private and secure. All fields marked with an asterisk (*) are necessary.

www.larinisystems.com

 

[Gprodigy]

the price for the Lorini box/axelback/silencer part is £1769. found at the end of the revmonkey video

but need to inquire here:

Enquiry Form - Advanced Automotive Engineering

To enquire about a System, please fill in the form below. Please be assured that your personal information is private and secure. All fields marked with an asterisk (*) are necessary.

www.larinisystems.com

updated.

 

[Gprodigy]

Here's a DeCat vs Full System pros and cons list from chatgpt.

**De Cat System:** Pros: 1. **Increased Power:** Removing the catalytic converter can improve exhaust flow, potentially leading to increased horsepower. 2. **Enhanced Sound:** De Cat systems often result in a more aggressive and louder exhaust note, appealing to those who enjoy a sportier sound. 3. **Simplified Design:** Since you're removing a component (catalytic converter), the exhaust system becomes simpler and lighter. Cons: 1. **Emissions Impact:** Removing the catalytic converter may result in increased emissions, making it illegal in some areas or affecting your ability to pass emissions tests. 2. **Potential for Check Engine Light:**-NON ISSUE FOR EMIRA "Doing a third cat delete will 100% NOT cause a check engine light. It is an un-monitored catalyst." 3. **Legal Issues:** In some regions, it's illegal to remove the catalytic converter due to environmental and emissions regulations. **Full Exhaust System:** Pros: 1. **Comprehensive Performance Improvement:** A full exhaust system includes various components like headers, mid-pipes, and mufflers, providing a more comprehensive performance upgrade. 2. **Balanced Performance:** Full exhaust systems are designed to provide a balance between improved performance and maintaining compliance with emissions regulations. 3. **Tuned Sound:** Some full exhaust systems are designed to provide an enhanced exhaust note without being overly loud, catering to enthusiasts who prefer a specific tone. Cons: 1. **Cost:** Full exhaust systems are typically more expensive than De Cat systems due to the inclusion of multiple components. 2. **Installation Complexity:** Installing a full exhaust system might be more complex than just removing the catalytic converter, requiring professional installation in some cases. 3. **Less Aggressive Sound:** For enthusiasts seeking an extremely aggressive exhaust note, a full system might not deliver the same level of raw sound as a De Cat setup. Ultimately, the choice between a De Cat system and a Full Exhaust system depends on your preferences, local regulations, and the specific goals you have for your car modifications.

 

[Time2Fly]

@Gprodigy as you get them can you add weight and decibels to the table?

 

[Gprodigy]

@Gprodigy as you get them can you add weight and decibels to the table?

done, Some sites do not have the info.

Some say the weight of their components and others only say how much is reduced from stock.

it can get a little confusing so feel free to drop info if somethings off.

 

[Time2Fly]

Awesome! Hopefully people here can post the weighed items as they receive them and take them off as well.

 

[Gprodigy]

Seems like Cat delete is the biggest bang for the buck in non Carb States.
Full system is pretty much a necessity for Carb.

Full system with a valve remote is great for neighborhood flexibility (especially if it has GPS memory functions.)

the Sound difference meter is still non conclusive :

Slightly better than stock to full F1 race car sound

 

[GRP]

Here's a DeCat vs Full System pros and cons list from chatgpt.

**De Cat System:** Pros: 1. **Increased Power:** Removing the catalytic converter can improve exhaust flow, potentially leading to increased horsepower. 2. **Enhanced Sound:** De Cat systems often result in a more aggressive and louder exhaust note, appealing to those who enjoy a sportier sound. 3. **Simplified Design:** Since you're removing a component (catalytic converter), the exhaust system becomes simpler and lighter. Cons: 1. **Emissions Impact:** Removing the catalytic converter may result in increased emissions, making it illegal in some areas or affecting your ability to pass emissions tests. 2. **Potential for Check Engine Light:** Removing the catalytic converter may trigger the check engine light due to changes in emissions-related parameters. 3. **Legal Issues:** In some regions, it's illegal to remove the catalytic converter due to environmental and emissions regulations. **Full Exhaust System:** Pros: 1. **Comprehensive Performance Improvement:** A full exhaust system includes various components like headers, mid-pipes, and mufflers, providing a more comprehensive performance upgrade. 2. **Balanced Performance:** Full exhaust systems are designed to provide a balance between improved performance and maintaining compliance with emissions regulations. 3. **Tuned Sound:** Some full exhaust systems are designed to provide an enhanced exhaust note without being overly loud, catering to enthusiasts who prefer a specific tone. Cons: 1. **Cost:** Full exhaust systems are typically more expensive than De Cat systems due to the inclusion of multiple components. 2. **Installation Complexity:** Installing a full exhaust system might be more complex than just removing the catalytic converter, requiring professional installation in some cases. 3. **Less Aggressive Sound:** For enthusiasts seeking an extremely aggressive exhaust note, a full system might not deliver the same level of raw sound as a De Cat setup. Ultimately, the choice between a De Cat system and a Full Exhaust system depends on your preferences, local regulations, and the specific goals you have for your car modifications.

Doing a third cat delete will 100% NOT cause a check engine light.
It is an un-monitored catalyst.

 

[Fasttoys]

Doing a third cat delete will 100% NOT cause a check engine light.
It is an un-monitored catalyst.

Yep best bang for the $$$ IMO. 3rd CAT is not going to cause any issues in non CARB states, still pass with flying colors

 

[Time2Fly]

Yep best bang for the $$$ IMO. 3rd CAT is not going to cause any issues in non CARB states, still pass with flying colors

But in CARB states it would fail?