I wouldn't worry about it. Mine dropped 15BHP the last time I ran it on the rollers and I was running 0.1bar more.
On yours the Japspeed sports Cat may not be 'all that' when you consider their cost Vx a premium brand
Personally I would run without and if needed put the centre cat back in for MOT.
Do WRX Hawks have the cat in the up-pipe ?
|