45Hp gain is impossible. I gained 75HP for my Porsche Turbo with ECU, Exhaust, Divert Valve and Air intake. Remeber how easy to gain power on turbo car. I chipped my 2003 E46 M3 with dinan (paid $450+tax??) and gain nothing.

__________________
2007 BMW X5 3.0 (on order / july production)
2007 Mercedes E550 silver / Black savanna beige
2001 Porsche 996 Turbo Carrera white (Stage 4)
2006 BMW 550I Alpine White (Sold)
2006 BMW X3 silver gray (sold)