Hi


I have a MY04WRX does anyone know how much BHP you gain with this back box if any . The car is leased so I have to use Subaru approved accessories.

 

I had one of these on my Sti before the PPP was fitted. You won't get much if any power gain but they do sound good.

I sold the back box to a fellow scoobynetter for around £100 quid and have seen a few on for sale section since.

Robsta

 

Hi,

A backbox won't make much difference to BHP, maybe 5-10 if your lucky. The only route to big BHP gains is removing the cats. It will sound better though

 

Thanks for comments guys. This is me first subaru.