rough estimate needed please,

The Car is a 53 reg UK WRX Blob Eye
Mods are

Hayward/Scott Decat Down Pipe and Centre Section and a standard STi Backbox......

any ideas on BHP/Lbs and what the rough 0-60 should be

thanks

 

Power might be up around 10%.

You won't know the 0-60mph until you try it

Most people won't even get close to manufacturers figures.