Bone Stock the Cobra was rated at 390 hp. It had a stock boost of around 9psi with the Eaton supercharger. Here’s a stock graph of my 04 Cobra:
- Cat Back exhaust ( Magnaflow is a very good option)
- K&N FIPK intake or JLT
- 2.76” upper pulley (Billetflow) which will increase boost to about 15psi.
- Billetflow snub Idler tensioner
- NGK TR6 plugs gapped at .035”
- Performance Dyno Custom tune
Here are the results: