Originally Posted by
Airscape
Went and checked bjames numbers he posted. Think he did 74mm with the MB airbox and tune. Stock was 168 after was 208. So ~40whp gain is typical I believe.
When I asked Mike at Eurocharged Canada the question last Fall he said the tune alone is good for approx 27HP over stock and the 74mm TB & Needswings single CAI add about another 20HP. Optimistic total of 47HP, but fairly close to what bjames got given that it's all approximate and will vary from car to car.