LotusTalk - The Lotus Cars Community - Reply to Topic
Thread: Evora 400 decat pipe - WOW! Reply to Thread
Title:
Message:
Trackback:
Send Trackbacks to (Separate multiple URLs with spaces) :
Post Icons
You may choose an icon for your message from the following list:
 

Register Now



In order to be able to post messages on the LotusTalk - The Lotus Cars Community forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in










  Additional Options
Miscellaneous Options

  Topic Review (Newest First)
07-20-2019 04:32 PM
Bizjet Guy
Evora S Decat

There donít seem to be any US suppliers of an Evora S decat pipe? I decided to take my unit with secondary cat to have it duplicated, sans cat, for $90. I recall that a few members had decat pipes custom-fabbed.
07-13-2019 03:04 PM
Scott Bowman I ordered a GRP decat pipe earlier this week. They were out of stock, but in production with availability estimated for next week. A couple days later I got an email stating that the pipe was being shipped out. It was delivered by USPS during lunch today and it is now installed and terrorizing the neighbors. Exceptional customer service from Greg and a nicely made part. I now see why everyone is so pleased with this easy mod.
06-09-2019 09:27 PM
zthang Just installed GRP's decat pipe today. As others have said, the pipe expander tool helps, not to mention dropping the whole muffler is the way to go. I tried for awhile to just slide it in to no avail. Ultimately the way I got the correct alignment was to drop the muffler, attach the decat pipe loosely to the v-band clamp, then slide the decat and muffler into place. Lastly tighten everything up.

The sound below 3k rpm is largely similar to stock, but above 4k rpm the shriek is much more raw as well as noticeably louder.
I made a quick comparison video of the sound between stock catted exhaust and with the GRP decat.
06-09-2019 09:10 AM
Julian73
Quote:
Originally Posted by Redsled View Post
... Also I lifted up the stock exhaust and Larini exhaust and the Larini was much lighter, i would say felt like half the weight. So at only like $1,500 it's a bargain to change for the weight savings along with a much improved sound. For my R8's and Huracan exhaust changes were $6k-$7k. Again thanks for the help on this Greg.
The Evora How-to section has a thread on weights with a link to google spreadsheet. While these are Series 1 exhausts not the 3" 4xx series I cannot imagine the OEM being any lighter while the Larini's take a BIG chuck of weight out.

I have just hear across the channel that Lotus is now offering a non-valved sport exhaust that's quieter than stock to be able to meet the harsh track sound level limitations, the unit weights about 3 kg less than OEM.
06-09-2019 06:10 AM
kell211
Quote:
Originally Posted by troyus View Post
I didn't find the need to use an expander or much of anything really other than some time with the mallet to disgorge the 3rd cat... and then some graphite spray to install the GRP unit. That said, man this stock exhaust is heavy though....!!! At least the weight is low. One of my best friends is a master tech for Maserati and had harsh words on my OSHA compliance, however.


I had the same experience. My 3rd cat was Incredibly difficult to remove from the muffler. I bet it took 30 min of working it back and forth and prying on it. And the new one slipped right in after, no problem.

I also found that the bend radius was slightly different than the original cat. When I first went to install it, it was about 1/2Ē off from meeting up to the old pipe on the engine side. I had to leave everything very loosely connected to get things together, then gradually tighten it all up.

Sounds amazing


Sent from my iPhone using Tapatalk
06-08-2019 06:34 PM
troyus I didn't find the need to use an expander or much of anything really other than some time with the mallet to disgorge the 3rd cat... and then some graphite spray to install the GRP unit. That said, man this stock exhaust is heavy though....!!! At least the weight is low. One of my best friends is a master tech for Maserati and had harsh words on my OSHA compliance, however.
06-08-2019 02:03 PM
jream Just installed the grp decat pipe today... holy hell this thing screams now! Significantly louder under normal driving circumstances and absolutely ridiculous above 4000 at WOT!

Went over to my buddies house and we knocked it out in a little under an hour. Super simple to do. Basically just remove the bolts holding the rear end cover shield. Undo the clamp that connects the exhaust assembly to the Y pipe. Take off the four screws holding the exhaust assembly in place and it easily comes out to finish the job. Undo the last clamp on the pipe to remove it. We had to beat it pretty good with a rubber mallet to get it to come off. Just working the cat pipe around a bunch to get it to free up to pull out. We picked up a rental pipe expander which you will definitely want to make things go easy. Use it to Open up the pipe where you insert the new pipe into. And simply re-install the exhaust assembly in place and bolt on the new Decat pipe. slap the cover back on and you are all set to piss off your neighbors!

Wasnít sure what to expect with the sound and throttle response, but after done I am extremely impressed!

Few pics





05-05-2019 05:46 AM
pharriso
Quote:
Originally Posted by KingkongLotus View Post
If you are working by yourself, find something to support the muffler. It gets heavy after a while. I used a spare rim laying around the garage.
I just dropped the whole muffler down with brackets - just 4 bolts & makes adjusting the fit easy.
05-04-2019 10:28 AM
pharriso
Quote:
Originally Posted by KingkongLotus View Post
Is it the ferry on the Long Island Sounds?
Yes, Bridgeport CT --> Port Jefferson, LI, NY
05-03-2019 10:37 AM
KingkongLotus Spent about 3 hours last night installing the GRP decat pipe and it was successful!! Got a chance to dive the car this morning and the sound is amazing!!! I used the exhaust pipe expander tool and the new pipe went in pretty easy. However, it was a tiny bit too long and I had to cut it to fit...Every exhaust is probably a little different.

If you are working by yourself, find something to support the muffler. It gets heavy after a while. I used a spare rim laying around the garage.
04-30-2019 07:51 AM
KingkongLotus
Quote:
Originally Posted by pharriso View Post
Just fitted my GRP decat, perfect fit, though i recommend this harbor freight pipe expander to use on the existing exhaust - https://www.harborfreight.com/automo...der-63704.html Best $19 you'll spend.

After installation delighted with the sound & throttle blips on downshift are definitely cleaner.

btw Guy came up to me on the Ferry & asked if the car was as good as it sounds!
Thanks for the tip on the pipe expander! That seems to solve the bigger challenge of this install! And yes, the car it definitely as good as it sounds! Is it the ferry on the Long Island Sounds?
04-27-2019 06:36 PM
Julian73
Quote:
Originally Posted by Champale View Post
With all of the cars I have owned over the years, I have never heard of a warranty claim being denied over a part of an exhaust aft of the catalytic converters. This 3rd cat doesn't even have an O2 bung so it's not part of the engine control system.

I guess if Lotus wanted to be jerks about a claim, I would just point out the fact that the rest of the world spec 400s don't have a 3rd cat so how could not running one here cause problems since it isn't tied into anything that monitors or adjusts fueling, timing, etc.
Even without feedback it still works as a Cat and cleans exhaust. If you fail a state emissions test they will dense the warranty of that. That said, cat is in place for the Cali emissions and other states that spec that.
04-27-2019 06:19 PM
phaphaphooey
Quote:
Originally Posted by lotusquacious View Post
IF TJ would let me, I'd put one in tomorrow. As it is, I'm waiting for the warranty to expire. How are you guys dealing with the potential, however small it may be, that it might affect the warranty?
Ha. When TJ was still at Gator in Indianapolis I brought my old Evora with the decat pipe for him to do extensive warranty work to it and his only comment was "man that Evora sounds great."
04-20-2019 08:29 PM
helado
Quote:
Originally Posted by Redsled View Post
I'm very happy with it and think it's sounds great. Weather finally getting nice here so will be out for group rides where I will get some videos. Throw in the weight savings and makes it a must mod. Also nice that its a pretty quick and inexpensive install, only took about 2 hours to do exhaust and decat pipe. On my R8's and Huracan install takes a full day since rear near needs to come off
Thanks man. I'm looking forward to seeing the videos once the weather breaks.
04-19-2019 08:43 AM
pharriso
Quote:
Originally Posted by lotusquacious View Post
How are you guys dealing with the potential, however small it may be, that it might affect the warranty?
With this:


Quote:
Originally Posted by Champale View Post
I would just point out the fact that the rest of the world spec 400s don't have a 3rd cat so how could not running one here cause problems since it isn't tied into anything that monitors or adjusts fueling, timing, etc.
04-19-2019 08:20 AM
Redsled They can try to void warranty but thanks to the MagnusonĖMoss Warranty Act they must prove the mod caused the issue. I have never had an issue with any car that I just did exhaust mods on
04-19-2019 07:58 AM
Champale With all of the cars I have owned over the years, I have never heard of a warranty claim being denied over a part of an exhaust aft of the catalytic converters. This 3rd cat doesn't even have an O2 bung so it's not part of the engine control system.

I guess if Lotus wanted to be jerks about a claim, I would just point out the fact that the rest of the world spec 400s don't have a 3rd cat so how could not running one here cause problems since it isn't tied into anything that monitors or adjusts fueling, timing, etc.
04-19-2019 07:38 AM
lotusquacious IF TJ would let me, I'd put one in tomorrow. As it is, I'm waiting for the warranty to expire. How are you guys dealing with the potential, however small it may be, that it might affect the warranty?
04-19-2019 02:51 AM
Redsled
Quote:
Originally Posted by helado View Post
Redsled,

How do you like the decat pipe with the Larini system sound-wise? I planned on ordering the Larini, but after the decat pipe I thought it sounded pretty darn nice.

Now Iím wondering if I should get the Larini too!
I'm very happy with it and think it's sounds great. Weather finally getting nice here so will be out for group rides where I will get some videos. Throw in the weight savings and makes it a must mod. Also nice that its a pretty quick and inexpensive install, only took about 2 hours to do exhaust and decat pipe. On my R8's and Huracan install takes a full day since rear near needs to come off
04-19-2019 01:50 AM
pharriso Just fitted my GRP decat, perfect fit, though i recommend this harbor freight pipe expander to use on the existing exhaust - https://www.harborfreight.com/automo...der-63704.html Best $19 you'll spend.

After installation delighted with the sound & throttle blips on downshift are definitely cleaner.

btw Guy came up to me on the Ferry & asked if the car was as good as it sounds!
This thread has more than 20 replies. Click here to review the whole thread.

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

 
For the best viewing experience please update your browser to Google Chrome