General Exhaust query

[SuicideUK]

I'm looking to get a backbox for my seicento. I know everyone will say "Buy supersprint they're the best!" but I really can't afford. So I've decided to opt for a cheaper way, either buy cutting off my current standard one and fitting a universal on, either by welding or jubilee clips.

I do want something less restrictive, I'm even thinking of getting a straight through or removing the cat con.

Any advice would be nice, but please don't blame me to crap lol.

Thanks in advance, Luke.

 

[fingers99]

Don't remove the CAT. It's a waste of time and will get you nicked/make your life hell. Otherwise, no issues.

 

[Brooky]

jubeleee clips will never seal an exhaust

 

[fingers99]

He right. Use exhaust clamps.

 

[SuicideUK]

I don't know much about cars really, so I need a lot of help getting things right. anyone know the size of the pipe behind the standard backbox?

Exhaust clamps it is, didn't know what I would need to use lol. Please no one quote that in their sig heh.

Luke.

 

[fingers99]

Just measure it. The local scrappy might be a cheap source of alternative backboxes. Take the old one along to size up.

 

[SuicideUK]

I did have a backbox already in mind...you'll all hate me when you hear the magic phrase;

Cherry bomb

The inlet is either 40/45mm stepped or a 50mm straight.

Please don't kill me for being slightly chavvy even though I'm a trendy.

Luke.

 

[AppleSei]

Cherry bomb exhaust will annoy you after so long i would imagine

Doesnt ebay have any second hand backboxes?

 

[SuicideUK]

They don't I'm afraid, I do want something a bit raspy, but when I came along the cherry bomb I was a little interested. 2nd hand universal back boxes are quite hard to find, especially with the size of the outlet being small for the seicento.

Luke.

 

[AppleSei]

well i wouldnt go for a supersprint then if you want something a bit raspy as there are slightly louder ones than that

 

[SuicideUK]

I don't really want loud, but something sporty that might give me a nice sporty burble. Changes tone when the throttle opens up you know.

Luke.

 

[ronnieronson]

I don't really want loud, but something sporty that might give me a nice sporty burble. Changes tone when the throttle opens up you know.

Luke.

everyone (that hasn't witnessed it 1st hand) will crap all over what I'm about to say, but since I have one and think it's perfect I feel I have a solid opinion here... Sportex.

On a Cinq these can be a bit too loud, but on the Sei (especially MPI Seis) they are much quieter - noticeable, but quiet enough not to be annoying (which is nice especially when motorway driving!).

Now I know your Sei is an SPI in MPI's clothing, so your cat will be totally different to mine - and as such doesn't muffle the noise quite as much, however if you found the sportex back box to be too loud as standard, you could always get a midpipe made up that has a baffle (I actually had my sportex made with a baffled midpipe - as I have a spare straight through pipe, which I may be putting on soon).

I do have an older video of the exhaust but to be honest the sound quality is crap - will do a new vid one night this week, but for now have a lookie here:
(Works best if you right click and save as - for some reason it doesn't play correctly on the forum player)
https://www.fiatforum.com/gallery/data/500/myexhaustsportex.avi

 

[AppleSei]

Sportex will be loud on his cento as its same as cinq engine. Its only on MPI that it is a bit quieter

Also sportex isnt stainless steel and will rust in a few years so will be unsaleable

So yes you are flamed

 

[SuicideUK]

How much did you pay for the back box? Reason being for me going universal is the serious lack of dollar so opting for the £60 mark ones. I'm looking for something in the near future, otherwise I'd prob get the laser one being sold in classifieds

Luke.

 

[alainax]

why don't you just hold on to your pennies and save up for a more expensive one?
or is it a case of thats all you want to spend?

 

[AppleSei]

ebay has the sportex at 139.95 but think thats the whole lot or majority of system not just backbox.

would save up like alaina said, you will regret buying the sportex sorry ronnie

 

[SuicideUK]

It's all I want to spend to be honest =/

Luke.

 

[AppleSei]

you wont get anything new nor a decent backbox for 60 notes

 

[SuicideUK]

I'm not even bothered if it only just changes the note to be honest. I'm a person who's big on performance, but with the shortage of funds it makes everything so difficult. Maybe when I can afford it I'll change to a full system and a stainless manifold. For now it'll be simple springs, a chip and induction.

Luke.

 

[ronnieronson]

Sportex will be loud on his cento as its same as cinq engine. Its only on MPI that it is a bit quieter

Also sportex isnt stainless steel and will rust in a few years so will be unsaleable

So yes you are flamed

Pah!

How much did you pay for the back box? Reason being for me going universal is the serious lack of dollar so opting for the £60 mark ones. I'm looking for something in the near future, otherwise I'd prob get the laser one being sold in classifieds

Luke.

erm, bout £100 inc midpipe & delivery next working day

The laser ones are supposedly quite quiet - even on the spi engine.

There's a remus one on ebay - had one previously, nice note to it - was just too quite on the mpi cat...