Hello San - that link just brought up the generic V band search at Summit - was the actual Lotus part listed?

I have now already tried two non-specific 3" 304 Stainless Steel ones and they do not fit correctly. I would like to just find the Lotus spec one and stop experimenting.

 

No, but this does.

https://www.lotusgarage.com/index.php?pg=3&l=product_list&c=691&my_rate=ZAR

San

 

Contact your local dealer or if that doesn't help try listings from here: https://www.lotustalk.com/forums/f170/parts-usa-465234/#post5924294

 

Excellent thank you guys!

 

Hey thank you for the offer, Greg! But I have one on the way through Brian and Dino at Gator Lotus. It is a weird very small clamp, to be honest. Oh well! I love the decat pipe and can't wait to be able to drive the car with it so thank you for taking up the mantle and making these available!

 

Installed Greg's decat pipe yesterday afternoon and I am very pleased with the results. I beveled the edge of the pipe that goes in the muffler pipe on my bench grinder and added a little grease to make the install go a little easier. My flanges did not match up perfectly, but the flange on the factory cat did not match up perfectly either. The v-clamp solves all the match up issues. Great service from GRP. My pipe was delivered in 2 days from ordering and the product is first class. Thanks Greg. While I had the cat pipe disconnected and the exhaust open, I cranked the car and it sounded REALLY good. Anybody removed the muffler completely and just run straight exhaust from the first cat back?

 

I just installed the GRP decat pipe and it sounds awesome. If you have a Federal Evora 400 I highly recommend this modification. I am not a mechanic so it took me a few hours in my garage without a lift to install the pipe. Pretty straight forward process, here is how I did it:
1. Remove diffuser/undertray
2. Disconnect orange vacuum line
3. Loosen muffler side clamp (clamp stays attached)
4. Loosen V-clamp on engine side. Gently pry with a flat tipped screwdriver around clamp until it releases all three sections. Push clamp back away from 3rd cat to engine side
5. Remove hanger bolts holding the muffler, 2 per side and pull out the entire muffler and 3rd cat
6. Wiggle the 3rd cat off the muffler
7. Attempt to insert decat pipe into muffler side. Tap around the opening with a rubber mallet to get it to compress slightly so it will fit inside. Also try prying open the muffler side a bit.
8. Grease up the decat pipe and start beating it into place with a rubber mallet. Place the 3rd cat side-by-side to get a rough estimate of where the engine side coupler should end up.
9. Place muffler with decat pipe back under the car to see if it lines up. If not remove and use mallet as appropriate.
10. Once you are close to lining up the couplers, reattach the hanger bolts, but do not tighten.
11. Replace V-clamp and tighten to align and seal couplers
12. Tighten muffler side band clamp
13. Tighten hanger bolts and reinstall diffuser/undertray.
14. Test drive and enjoy

Thanks Greg for making this available!!

 

Finally got it back together and drove it tonight. Wow wow wow. It sounds even better than before! Slightly lower octave in the bottom half of tach but then it makes that wonderful rip up to the redline and it's even louder and more outrageous than it was. Windows up in 6th it is no louder than before, even in Race.

Thank you, Greg! What a nice addition to this car!

UPDATE: after driving it some more, I am still in love with the sound and have noticed a side benefit of the install - heel and toeing is much smoother now because the engine seems less fluffy and inconsistent. I also have a K&N filter so maybe it is this combination I am not sure but when I blip the gas on downshifts, the engines revs exactly how I wanted it to. Previously, probably half the time it wouldn't bring the revs up the way it should and felt sort of fluffy.

 

UPDATE: after driving it some more, I am still in love with the sound and have noticed a side benefit of the install - heel and toeing is much smoother now because the engine seems less fluffy and inconsistent. I also have a K&N filter so maybe it is this combination I am not sure but when I blip the gas on downshifts, the engines revs exactly how I wanted it to. Previously, probably half the time it wouldn't bring the revs up the way it should and felt sort of fluffy.

I really need to get mine installed if this is true. The inconsistent heel toe behavior drives me nuts.

 

Daughter wanted me to take her to the bank to make a deposit in our little one-red-light town. She request we go in the Evora since she had only gotten to ride in it one time. I told her I had modified the exhaust with a decat pipe so it may sound different. This was my second time out with the decat pipe installed. The exhaust sounded great as we wound our way 7 miles to the little town. When we got to town, we rolled down the windows to enjoy the nice spring day in central Texas. When we hit main street there are old brick buildings on both sides of the street giving us the "tunnel effect" an OMG we were rattling the windows on every store front including the two-man police station. It was "giggle worthy". Thanks GRP!!!!

 

QUICK TIP: Go to AutoZone/Advanced Auto and get a muffler expander tool. They have them in the free tool rental program. Slide it in and crank it open to open up the pipe on the factory muffler to make it easier to get the decat pipe in.

Spencer

Great suggestion! I will have to do that.

 

Just ordered the decat pipe from Greg's. I've had my 400 for 3 days and already put 600 miles on it. This car is so awesome!

 

Confirm RSM's post above. Definitely need to expand the muffler a bit, but otherwise pretty easy install. No extra parts or modifications necessary. Sounds AWESOME! Not going to bother shopping for a system or considering straight pipes at this point. Sound improvement is significant in the first half of the rev range (and noticeable in the latter half as well).


For anyone worried about drone, etc., it's still pretty quiet when not in Sport or Race mode. Very civil.

 

Have been waiting a month for a decat pipe from Larini, was ordered along with their Club Sport Valved exhaust. Got the exhaust right away and finally gave up on waiting for their decat pipe and figured GRP pipe would work with Larini exhaust. Greg was great a rushing one out to me and got it installed with exhaust this morning. It worked great, tech even said fit was better than previous Larini pipes which like what I have been seen here required a little fiddling to get it connected. Wondering if GRP made some adjustments on this second batch? 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.

 

... 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.

Refer to weight thread with link to a google cloud spreadsheet, one page lists weight ranked exhaust systems. As to pricing my 410 has the optional Ti exhaust muffler, I have not taken it off to weigh, however the pricing was proud at $8k as an option.

https://docs.google.com/spreadsheets/d/1owtKCrsxDfFukxydG82NiN6gHxjIJFIIyXYceHhTXkY/edit#gid=8

also found under How to subform ... Evora Weight Savings

 

Glad to help Scott!
Be sure to post up a sound clip/video! Curious how the Larini sounds on the 400.

 

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 I’m 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

 

Redsled - would love to hear more about the volume of the decat with the Larini! With just the decat pipe, my 400 is shockingly (beautifully!) loud.

 

Ordered the GRP decat pipe the other day after hearing the exhaust on another owner's car. His 3rd cat was replaced by welding a new pipe to it permanently...it sounded it really really good on the road!!

 

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/automotive-motorcycle/exhaust/large-tail-pipe-expander-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?

 

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?

 

How are you guys dealing with the potential, however small it may be, that it might affect the warranty?

With this:

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.

 

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.

 

They can try to void warranty but thanks to the Magnuson–Moss 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

 

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. :grin2:

 

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. :grin2:

I just dropped the whole muffler down with brackets - just 4 bolts & makes adjusting the fit easy.

 

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!

Wasn’t sure what to expect with the sound and throttle response, but after done I am extremely impressed!

Few pics

 

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 1/2” 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

 

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.

 

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.

 

I got the same response from Greg late last week when I ordered mine. I was expecting at least a week or two of delay but to my surprise I got a confirmation of shipment just a couple of days later. Mine should arrive today!

Ya'll say I don't have to lift the car to get 'er done. That would be good because I don't think my car will fit on my bike lift )) and I don't have any way to support the car except on its own wheels.