Want recommendation on ECU reprogram - what are cost and hp gains (I know, I searched - give me a link or opinion/fact if you are willing); Works? Vishnu (without exhaust)? other?
Also, how much can you get from catback?
Any input/link appreciated

 

Check out he WORKS and VISHNU forums. That would be a good place to start, there both great products. It just comes down to what your goals/plans are for your evo.

 

This has been covered before. Try using the search function