Bought a cream puff here in Iowa for 3400.00 It has 111,500 miles on it head gasket replaced in 02 turbo rebuilt in 04 . Runs good not great. Pulls that darn code 51. Just wondering if anyone knows anything about a superchip controller. It had one installed about 8 years ago . Has slides at certain rpms you can adjust and also a master slide to max out settings. Looks like an equalizer with led lights below each slide Thanks Dave