To give you a little perspective using my car as an example.
All Stock - Dynos 362 whp on a DynoJet
Full Exhaust HFC's, tune and 20" wheels - The car dynoed 347 whp on a DynoJet
So there is a significant difference
-2015 AW M4 and 2014 G63
-(2012 | Laguna Seca Blue | Rust Brown | Individual | 6MT) SOLD