Originally Posted by
h100vw
The idea with Phase 1 is that it is for standard cars. Once you change the downpipe though, to make the most of the extra flow and prevent any cat efficiency codes coming up you need Phase 2. That's the point I would introduce the FMIC to if you are going to.
If you have plans to go Phase 2 in the future, I would encourage you to leapfrog Phase 1. Even with the discount I give for the re-tune, you could nearly buy the downpipe instead.
Phase 1 $799 Phase 2 $899. Upgrade from 1 to 2 is basically done at cost but still close to $500.
Gavin