Back box for 2.0 litre

[Clean 2.0 nova]

A while ago I asked what exhaust would be the quitest to fit my 2.0 litre nova. As magnex was not available anymore the recommendation for quietest system was a mongoose system. After purchasing, modifying and fitting the system I found the exhaust still too loud even just above tick over. For now I have been running round with a 1.2 nova back box.

I have contacted mongoose's technical expert who advises that the mongoose rear box is a straight through box and will be noisy on a 2.0l engine. I have looked at some alternative's and are left with the following options:

1. Custom made rear stainless box around ?150
2. Fit a O.E. GSI spec rear silencer for ?55

Will a GSI rear box be too restrictive with a 140BHP engine or should I spend / waste even more money on the system?

[Welsh Dan]

Iainell's eurorallye system sounds pretty nice, and is quiet at tickover, what about something along those lines?

Or getting an astra/cally/cav backbox modified to fit a nova?

[GRUNT 16V]

custom system they can make it as quiet as you wan t to a degree

[Adam]

Yeah the EuroRallye systems sound cool, the reason for that tho is the backbox is massive.

Pretty much all aftermarket exhausts are straight through boxes.
My old cars powerflow backbox was straight through.

It depends what you call loud tho./

[Stoo]

My DC2 had a titanium tanabe system and decat and that was 115db! thats loud!!!!

Best bet is to try ask powerflow to put another box in somewhere to tone it down a bit!

[Clean 2.0 nova]

Inquired at Eurorallye and they are ?125 inc delivery, theyre out of stock and that isn't stainless

[Adam]

What do you expect for ?125? lol

[BIGS]

I was having the same problem as you. all i want is a magnex and nothing else. so ive looked into it and im going to buy a corsa one and get the guys down my way to bend it to the nova shape. they said it not top far off from the both

[Dar]

I wanted mine nice and quite so I had a custom stainless system made with three silencers. Its now 91db@4,500rpm

So my advice would be to put another silencer in the system.

[blue_peg_16v]

total agree with dar put an extra box in the mongoose

[Stoo]

isnt that what i said a few posts up?? lol

[Dar]

isnt that what i said a few posts up?? lol
Yup, just shows what a good idea it was:thumb:

[Stoo]

great minds think alike eh dar!

[Dar]

great minds think alike eh dar!http://www.alanwake.com/forum/images/smilies/nod.gif
Seems the best solution all round as well since he can keep the system that he is currently running. An extra silencer will make it quiter and hes not replacing components that have already been purchased.

[Stoo]

as long as its not too restrictive itll be fine, mind you with a little more back pressure he could gain a little torque

[Clean 2.0 nova]

My reference to the Eurorallye back box not being stainless was because for the extra ?25 I could get a custom stainless back box.

Getting the middle box replaced (already 2 small silencers fitted) will probably be cheaper option (?50) but specialists say rear silencer would be best (yes they get more money). Does anyone think a GSI rear silencer would be a bad idea. It should be noted I also would like to lose the overly large 3.5" tail pipe.

Anyone want to purchase a new mongoose back box, done 300 miles?

[Stoo]

i have an OEM Gsi mid section and backbox here