as title will it be ok to change back to my standard sti backbox after having my map done with full haywood and scott system fitted ?

 

depends on the power of your car, obviously it will affect the map as the new exhaust won't flow as well as the old but if your not running much power I can't see it making much of a big deal until you have time to get a map sorted.

 

Yes the added back pressure will not be a wise move IMHO I tried this for a quieter exhaust for Bedford trackday and it felt nasty.

I can feel the difference between my H&S Scooby Sport and then swapping for the full H&S bean can, so the STi box will be even worse.

 

ill have to stick with my loud system then

 

Exhausts don't have to be noisy to flow well, there's a compromise somewhere!
We've often added boxes or changed whole systems for something quieter and lost nothing.
It's a flow issue in any event, and any car below 300 bhp is ok on a sport cat and 2.5" system.

 

Hey, don't let me pee on your barbeque!

 

Miltek for instance, great free flowing exhaust but nice and quiet.
I ran a full 3" de-cat tornado system on my car. Fantastic system which was quiet at cruising speed but came alive on WOT.
Sell your HandS back box and get yourself another aftermarket one which is a little quieter.

 

Yes I don't want something too quiet but on the other hand not stupidly loud so is there any recommendations ?

 

Tornado back box from scoobyparts.com.

Think its roughly £200.

 

That price doesn't sound too bad, has anyone Got a vid of the tornado back box sound or any others that might be what I'm after ?

 

Revolution system is cheap and perfect for flow and noise

 

Would a prodrive back box be ok ?

 

I've been trying to find the answer to this question also. I fitted a Hayward and Scott back box with full decat and its too loud for me now , wakes the neighbours first thing :-/

I fitted the exhaust when I had my md321h turbo fitted and mapped. I liked my standard back box but was told it wouldn't allow me to make the most of the turbo. I need a quieter one now !!

 

I'd much rather lose a few bhp if the alternative was being defended every time I went for a drive!

 

I agree completely. Mine isn't silly loud like some you see , its only 2.5inch Decat with the standard mid silencer ...
I just don't want to fit a different back box and it cause running issues because it was mapped specifically for the current one. Its making plenty of power so losing a tiny bit doesn't concern me :-)

 

Hi I recently changed my blitz nur spec r to an original prodrive back box on my 05 sti and it does not run as well and more thirsty as it does need a remap as advised by scoobyclinic. This is because it was mapped when the blitz was originally put on

 

That's what I thought might be the case ...

Once its warmed up its not 'too' bad but first thing its a but much... Ill speak to the garage that did the work and see what I can do ! Thanks

 

I presume you have an STI?

The PPP back box is pretty good and not too loud to annoy your neighbours.

 

hi yes I have an 05 sti PPP

 

Ninja 2,ideal compromise IMO