I don't have a before / after dyno so I can't say. I don't think it help mine out that much, the intercooler would have probably been better to do since I have the series 2. That is quite a bit more work though. If it keeps things running safer then it's more than worth it to me.
I ordered the additional brackets from Gord, but we were able to use the Saleen bracket on it.
Shaun