XClutch Twin Disc Review & Installation (6MT N54)

The Convert

Lieutenant
Jun 4, 2017
966
I have minimal to next to no nvh in high load low rpm situations but I run stock bushes, stock mounts and factory oil with a full titanium akrapovic exhaust, akra in their infinite wisdom put flex joints in their dp but they are tiny compared to AR design

Even though they are near a perfect fit still need some kind of flex joint to relive fitment situations.

When I ran the stock mids they where horrible and definitely need some kind of flex joint.

GGMR2T try the flex joint on both your mids and you will be pleasantly surprised how much better the fitment gets and lowers the nvh.

Not saying it will get rid of all as there is to many variables in most peoples setups but it did in mine and will definitely help a lot in most.
Is your exhaust the full titanium version? If so, mind throwing some sound clips up? I’d love to hear it.
 

fredcase

Corporal
Jul 9, 2017
222
Ok guys i'm going to share something with you which will greatly help reduce nvh in your car especially with twin plates.

What I found that if you have less than stellar down pipe fitment whilst using a standard or similar exhaust you will get excessive nvh in high load low rpm.

To get rid of it you either get an aftermarket exhaust with multiple slip joints to relive the tension or weld it flex joints like this between the bracket that holds the exhaust up next to the gearbox and the dp.

This will greatly reduce nvh, that's why the factory dp's had them.


View attachment 27384
Brilliant. I don’t even have my new clutch yet, but noticed significant vibration increase when I had my secondary cats cut out. The cat back, and dp’s need significant persuasion to line up. Flex pipe ftw!
 

martymil

Lieutenant
Free Vendor
Sep 6, 2017
859
Down Under
The exhaust is not really the problem but solves it.

It's all the aftermarket 3" dp, some fit better than others but are mostly less than stallar.
 

fmorelli

Colonel
Staff member
Aug 11, 2017
2,112
Virginia
So true on the DP. You can work them some a few ways (pry bar, unbolt, etc) ... but yeah I agree! The first set I tried to install, I sent back. Second set was good enough. "Slap it on" doesn't work for stuff like DP's and turbo outlet on these cars.

Filippo
 

Torgus

Captain
Nov 6, 2016
1,033
Boston
I would think that is the case for inexpensive downpipes made in China. I don't recall hearing fitment issues with AR or CPE or any of the higher end DPs iirc. I assume much better quality control. But few want to pay for it.
 
Top