Mazda mx 5 Adjustable Power Boost Controller

[SLYDIT]

Peter....
that ecu mod that you linked to is a con job!
total total rip off and wont give you any HP.

the best piggy back ecu is the Greddy E Manage (thats what im running)
it has full control of fuel and timing and can data log which is a great feature.
when i tuned my turbo the tuner guy couldnt beleive how much it could do for the price.

expect to pay about$750 for an emanage and laptop software.