Hi All,

Forgive my ignorance. Does anyone know if swapping the backbox on an otherwise standard MY99 for a H&S "scoobysport" backbox reults in any increase in power. If so, how much?

Any advice appreciated.

Best.

 

Im sure it will yes, probably around 8bhp, but will feel a bit perkier.

You can tell the difference at a guess.

Do the full system and you will notice alot more!

 

Do the full system and yes you will notice a difference and the sound is superb

 

Thanks custom, thought it was just my imagination! It feels a bit keener lower down the rev range and sounds very nice allready. I dare say I will get the full system at some point, but its ok for the time being. I've only just bought the car and have already done my first minor mod! Next on the list is cosmetic stuff: colour coding and a big sti5 spoiler!

Best.

 

Had one fitted to my 02 STi last week and noticed the same as you. Thought I was imagining it too. Turbo seems to spool up a bit quicker as well. All bonuses as far as I'm concerned as the sound was the main thing. Gets better with a few hundred miles on too. Well chuffed.

 

Take a look at this

 

now do the whole system including down-pipe and headers (manifold)

you'll deffo notice that ;-)

then re-map

 

I lied - it is the Scoobysport backbox I had, not the H&S "Original". Watch out, low flying handbags could be here soon.

 

*ducks* Yes, I seemed to have inadvertantly opened a can of worms on that issue in another thread. I refer to it as the H&S backbox just to be safe!

Our comments seem to reinforce the notion that whether you go for the Janspeed one or the H&S one, you'll be very happy with the results! Mine sounds great already and hasn't even bedded in yet!