from past experiance with FTO's they gain next to fcuk all bhp and lose alittle torque, but pwiggles said that WRX's without a remap actually lose bhp this true fella?
I'd expect any turbo car with an otherwise standard exhaust would gain a bit from a decat. I think that often the biggest difference is in mid-range torque though rather than top-end power.
No cat means faster exhaust gasses which means quicker spool so more mid. If like on my SW20 your wastegate isn't quick enough at venting you'll see a small boost increase too giving you power through the rev range.
I'd expect any turbo car with an otherwise standard exhaust would gain a bit from a decat. I think that often the biggest difference is in mid-range torque though rather than top-end power.