Exhaust systems, best one to boost horsepower

[Flaks05GT]

I have to tell ya. I have done many mods to my car but I absolutely love the sound of the JBA LT headers, H-Pipe w\ high flow cats combo. I do still have my Flowmaster mufflers still on there. The sound is amazingly deep and throaty until I open her up and then she sounds like a top fuel racer when the lights go green

 

[07gtfolife]

This system produces 19 hp 20 torque. 15881

So this garbage gives you that much of gain. I thought there wasn't much to be gained by changing axel back.

 

[bigcat]

So this garbage gives you that much of gain. I thought there wasn't much to be gained by changing axel back.

find a sheet from a customer, instead of the manufacturer. that will give you real world numbers. compare them to this sheet and see if it is correct...