Exhaust opinions needed

H

Himi

Member
Hey,

So I have a 20i currently with a mid box delete. After some lucky browsing online I managed to find a 35is diffuser online for not that much money... now it's arrived and itching to be put on my car. Question is what exhaust option do I go for? I was looking at getting an BMW 35i exhaust but they are expensive leaving with the below in mind:

1) keep the mid box delete and have a box box delete and tips

2) get the mid box put back in and get a back box delete n tips

3) keep mid box delete and ask for a custom back box.


Any other ideas? I'm open to them. Not sure about losing back pressure etc on the engine and even after hours of online searching I'm still confused...Any help will be greatly appriciated!
 
I’ll be watching this thread intently, got a 20i, wanting a nice subtle growl... nothing much and no droning.

@Himi- where are you based?
 
Hi, with a turbo engine you want as little back pressure as possible which is different to what’s wanted on a normally aspirated engine :thumbsup:
Rob
 
ZedConvert said:
I’ll be watching this thread intently, got a 20i, wanting a nice subtle growl... nothing much and no droning.

@Himi- where are you based?
Click to expand...

Us 2.0i'ers need help! Haha

I'm based in Romford, Essex
 
Smartbear said:
Hi, with a turbo engine you want as little back pressure as possible which is different to what’s wanted on a normally aspirated engine :thumbsup:
Rob
Click to expand...

You Rob... have given me a few more hours of online researching. That's good to know.

I'm worried about sound levels too. I do 18k miles a year minimum and am always meeting clients.
 
Himi said:
R60BBA said:
Get a Supersprint :thumbsup:
Click to expand...

The price scares me. I've been quoted £350 for backbox n tips from an exhaust place with What seems to be good reviews online.
Click to expand...

I did it, had no regrets.

But if you’re on a budget you’re probably better off going to a fabricators.

Good luck :thumbsup:
 
R60BBA said:
Himi said:
R60BBA said:
Get a Supersprint :thumbsup:
Click to expand...

The price scares me. I've been quoted £350 for backbox n tips from an exhaust place with What seems to be good reviews online.
Click to expand...

I did it, had no regrets.

But if you’re on a budget you’re probably better off going to a fabricators.

Good luck :thumbsup:
Click to expand...

Thanks mate. Planning on getting booked in later this week... I'll feedback!
 
So I went in today and spoke to one of the fabricators. We decided it was best to put my mid box back in and delete my backbox as it will A) the cheaper option and B) Be a brilliant noise without being OTT.

I'll upload the results... the tips are on the larger side but I felt the smaller tips looked abit lost.

I really do recommend the box delete. :driving: :thumbsup:
 
Just realised the pictures came out shocking but here you go for idea:
 

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ZedConvert said:
[ref]Himi[/ref], waiting in anticipation! What was the cost in the end too...?
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Haha sorry mate, uploaded now! The exhaust was £350 but I sourced the diffuser myself!
 
Apart from anything else, the rear end looks balanced now (and better for deleting the 'Z4').

p.s. Sorry your aerial's broken, though.
 
Busterboo said:
Apart from anything else, the rear end looks balanced now (and better for deleting the 'Z4').

p.s. Sorry your aerial's broken, though.
Click to expand...

Haha Thankyou :thumbsup:

I know, I know, it's terrible but as you can see it's slowly growing back.
 
[ref]Himi[/ref], love it!

Can you send me details of the defuser? Guess they fitted it for you?

And importantly... can you upload a video of the sound, idle + with some revs... please?
 
ZedConvert said:
[ref]Himi[/ref], love it!

Can you send me details of the defuser? Guess they fitted it for you?

And importantly... can you upload a video of the sound, idle + with some revs... please?
Click to expand...

Sorry mate it's been a mad day at work... I've only got one question? Why haven't you gone and already done this? It's been nearly 24hrs!

I'll get the part numbers you need (I've just realised there's a rear valance bit that I've not even fitted yet as I'm taking it in to get painted)

I'll try n get some vids ASAP too!
 
Diffuser is 51122158797 for the top part and 51122158799 for the bottom part.

There's two types of diffuser. The 35i have a dual exit cut but the 35is has flared cuts. The part number above is for the flared ends, like I have.
 
Off topic - but I still have a downpipe for an N20 - more sound and reducing pressure = more power

However, it is an MOT failure
 
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