Pro speed stainless steel exhaust

[Acidburn]

Charlie at prospeed is reluctant to do 3" over the rear diff due to lack of room. 3" Turbo back with a cat and 2.5" over the rear diff with just the rear silencer should be under 95dB Rusty has a similar setup and im sure his is.



Im going to have to disagree...Surely the fact that my ABY engine is running little more than a chipped ECU to increase power and it runs healthy above average BHP and good torque throughout the rev range means that it cant be restrictive, the turbo spools quickly and at low revs! 2.5" standard system with standard cats.... i agree. As it is quite badly designed and restrictive quite close to the turbo.

If you want to know about that size exhaust being restrictive, look at darrenm's old posts from when he first got his s2, it cost him the headgasget

[Rusty]

No, haven't measured back pressure but it was on stock cats before and the silly y piece and a 2 box milltek, now on a 3" DP, 100cpi cat, 3" to the rear subframe and about 50cm @ 2.5" and one box at the rear, will be better than before for sure. and I'd wager better than the Milltek 2.75" system that has a 200cpi cat, retains the Y piece and has a 2 box system and 2.75" pipework. For sure, not as good as a pure 3" system but then not as boomy either, depends what you're after, I know Newsh is tearing his hair out with the noise of his 034 system.

[urS6Tom]

thanks for the advice

i'll go with 3" dp, 100cpi cat, no centre box and tapering to 2.5" for the last 50-70cm into the rear box.

My only question mark is how much 'drone' do i eliminate by tapering to 2.5" vs just keeping it 3" all the way to the back....

Tom

[Jamo]

I'd rather have the two boxes be more effective than the tappering by itself!

One box system are loud!

[merlin's S4]

I'd rather have the two boxes be more effective than the tappering by itself!

One box system are loud!

And that's exactly what I have. I think you'd be crazy to not have a centre box!!

[urS6Tom]

aha - glad i asked now

ok, so it's 3" all the way back with 2 boxes!

any advice on best spec for centre and rear boxes?

[Rusty]

Mine is 1 box and isn't loud. Charlie hand makes the silencers to order so can be tailored to suit.

[Big Lee M]

Am I reading this right that Pro-speed with do a 3" turbo back exhaust for £650?????????????(on the best sort of S2 there is AVANT) If so that is a really good price.

[Rusty]

Yes, that might include a sports cat too. Charlie must have forgotten my car

[Big Lee M]

That's a god dam good price if that includes a sports cat! I was thinking it was going to touch 1k for that.....

[RustyNut]

Well i need one too so lets see if he can do a deal? If i get my car going this weekend i'll be calling Prospeed to book the car in.

[s2spike]

I put 2 boxes in my system, which is 3inch turbo back, it was 94db on the sound test at adi, its not boomy I think its just right.

[anthonys2]

So Rusty going back to my original thread do you think its a good idea going to pro speed and if others on here are going for something similar it might be worth seeing if we can may be get a discount??

[Rusty]

As I've said to others, their work is good and you can't ignore the value for money, just make sure you agree all the details of the system beforehand. These are rare cars and they don't do too many of them so what you might have seen on here and assume they'll do might not be so, as happened with mine. By agreeing the details (down pipe design, box placement, 2.5"/3" transition if appropriate etc.) you get what you want first time

[RustyNut]

I'll be contacting Prospeed either later today or tomorrow to book my car in for a turbo back 3" system. Is anyone else interested?