Prospeed Exhausts - Cardiff - 2011 Update

[Rusty]

Right, just been speaking to Prospeed over in Cardiff about getting a new system on my car as I want something louder and better flowing than the OE DP, cats and Milltek cat-back. I have got 2 options, both should be about 90-95dB and so be fine for track days in the UK and abroad, to achieve this I have to have a 2 box system and it's been recommended that I drop the diameter to the rear box to clear the driveshafts better.

Option 1:-

3" downpipe
100CPI sports cat
3" pipe to centrebox
2.5" pipe to rear box
twin 2.5" tail pipes

Option 2:-

3" downpipe
100CPI sports cat
3" pipe to
inline 4" silencer in middle of link pipe
centre box to 3" side-exit pipe by driver's side rear wheel

I have to say I really like option 2, it's lighter and should remove the issues of the exhaust knocking and rubbing on the driveshaft with a lowered car. If I get it wrong then I supose it's only money and with these cars you can spend £100s on what seeems like nothing

[s2driveruk]

prices....?

[shark_90]

Side exit is gash mate. And you'll probably get bored of it over time having thought it was a good idea at the time of shelling out. And it might set fire to your sills.

[S2central.net]

Side exit is great actually... Correctly positioned it is no more likely to burn the sills than a normal exhaust would the rear bumper...

No scream pipe option then ?

[re2500]

Side exit sounds cool to me! But you'll have to do something with the cut-out in the rear bumper IMO! In that case it would get my vote!

[DarrenM]

Be warned, the 2.5" cat-back Longlife that was on my car when i bought it was REAL bad, not only gave a nasty drone noise around 4,000rpm but made the car feel restrictive. Needless to say it was scrapped.

Why not do option one but with 3" all the way. With cat & twin boxes should be ok noise wise. Mines 102db's on a single rear box magnaflow but i wanted it ferking loud..

[Rusty]

Shark, as I said, if I don't like it then I'll have to get it rectified, of course if it's great and I love it then I'll be over the moon! Not too worried about the rear bumper at the mo but I think it would be good. Don't want a screamer pipe as it makes the car really obvious, if done correctly the side exit should be quieter than a single box 3" rear exit system, lighter than a twin box system and as I'm thinking a single 3" down turned pipe to avoid the sills, it should be ultra stealthy too

[DarrenM]

I'm thinking a single 3" down turned pipe to avoid the sills, it should be ultra stealthy too

Till you blow some old boy of his bike at the lights!!

[Rusty]

prices....?

>£400 for the DP, <£350 for the cat back.

Be warned, the 2.5" cat-back Longlife that was on my car when i bought it was REAL bad, not only gave a nasty drone noise around 4,000rpm but made the car feel restrictive. Needless to say it was scrapped.

Why not do option one but with 3" all the way. With cat & twin boxes should be ok noise wise. Mines 102db's on a single rear box magnaflow but i wanted it ferking loud..

But at 102dB you're limited to the expensive 105dB track days and you're also not able to do Combe and this ADI and VAG Day are out of the question. I want 95dB maximum and have discussed how to achieve this with Prospeed.

Side exit is great actually...

Yeah, I think it might look pretty good too and I hope to save a few kg. Might ask them to weigh it.

[Fat Audi 80]

Can nobody "Flatten" a 3" pipe a little to get it over the rear axle?

Option 1 with above would be ideal.

I have to say Andy, I hate side exit exhausts, I just think they look awful make the rear of the car empty and don't really suit the S2 at all. But it's only IMO of course!

Good luck whatever you decide.

And get on with it!

Cheers,

Steve

[hiltoa]

Chris M & Ross have had experience of a side exit system...

http://www.s2forum.com/forum/showthread.php?t=13145

[Rusty]

Yeah, thanks for the link, I remembered that there were a few people who had them but not who!

It's all personal preference fatty, you like to polish my car to perfection and I want a loud track car.

I think I'd prefer to have it kept within the lines of the car with a down swept 3" pipe and thus nice and stealthy, I think the problem will be whether the centre box can get enough ground clearance or not, it no then option 1 is the boy, if yes then option 2.

Darren, as only the rear 1/3rd is going to be 2.5" on option 1 I think it'll be OK, I want it quite loud so that should even out the peaks that you ge with a poorly silenced system AND this is not Longlife and has been recommended by a few peeps.

Don't worry fatty, I'm going as fast as my rubbish body will take me, just tried the slowest bike ride known to man and I feel like I've ridden flat out for 15+

[DarrenM]

>

But at 102dB you're limited to the expensive 105dB track days and you're also not able to do Combe and this ADI and VAG Day are out of the question. I want 95dB maximum and have discussed how to achieve this with Prospeed.

This is true but i wanted loud 5cyl rumble for the roads and can slip on one of those gay sliencers if need be for track. Im no engineer but going from 3" to 2.5" seems like a bit of a no brainer imho. 3" over rear axle is tight but certainly acheivable.

Why not 3" with 2 boxes, should be around the 95-98db's i would have thought?

what are standard systems noise wise btw??

[Jamo]

You go 2.75 inch over the axle it's the best option. 3" is a pain but can be done

[Jamo]

Habib also had a side exit