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View Full Version : Middle Box / silencer question


Carlvtr88
29th March 2012, 16:11
I have a custom straight through exhaust, with decat mani....

Basically I wanted to tone the noise down as much as possible.

Phoned the exhaust place up and they said they could weld me in a stainless centre silencer (middlebox he called it) to bring the noise down.

Would this work OK. I still want a nice purr but hate that loud drone you get on motorways.

Has anyone ever had a decat mani with standard exhaust on a mark two....I imagine if i had the middle box mine would sounds similar to a setup like that.

leej
29th March 2012, 16:30
ive got a mk2 furio with only a cat and mine is way too loud i would try the center box on your if its too loud for you

Carlvtr88
29th March 2012, 16:35
ive got a mk2 furio with only a cat and mine is way too loud i would try the center box on your if its too loud for you

Mine was OK, when i only had the straight through.

I thought id be able to tolerate the noise increase when i had my decat mani on but.... its not happening. I want to basically try and keep the power gain i felt with the decat mani, but limit the noise a touch.

Only thing i can think of is having a centre silencer welded into my system.

Its not too bad on normal roads, its the motor way and on acceleration. It gets so loud you can barely hear conversation. Getting a bit annoying now.

leej
29th March 2012, 19:47
ive got a double back box one each side of the car and i can fit my fist in it and still got room and way to loud 1st 2nd 3rd gears wish they were a bit smaller and less noisy

xxo0pko0xx
29th March 2012, 19:50
yes it would work its basically a baffled.box. will lower the noise about 10db
if your lookong to to go even quieter try a.resonated backbox. miltek do some ones but theyre a bit to.quiet for my liking

Carlvtr88
29th March 2012, 21:31
I think as you say, reducing it ten db sounds about right. Middle section it is then. Should be ok.

jones91
29th March 2012, 21:48
As above a baffled midbox will reduce the noise by about 10-12 decibels, so u should still get a nice sound without it being too annoying

On my vts I used to run a straight through exhaust 2" exhaust with no cat or midbox, onto a 5" custom made backbox and also had no soundproofing, and believe me that was nearly unbearable at times

Carlvtr88
30th March 2012, 16:55
As above a baffled midbox will reduce the noise by about 10-12 decibels, so u should still get a nice sound without it being too annoying

On my vts I used to run a straight through exhaust 2" exhaust with no cat or midbox, onto a 5" custom made backbox and also had no soundproofing, and believe me that was nearly unbearable at times

Its crazy aint it lol.... It has this horrible drone when accelerating on a motorway, then seems to dissappear anything after 75.