How much will a cnc racing head an expansion chamber increase the power?

[TYDYLWAVE1]

I am getting both of these and currently with a 32t sprocket I do 35mph, how much faster will this make me? and will it sound alot more awesome?

 

[Gordy]

What engine?

 

[Johnny_]

What engine?

The question that has never been answered. Lol.

 

[Gordy]

Looks like a generic 66/80. So a decent head and MZ65 would make a pretty big difference

 

[Chainlube]

Looks like a generic 66/80. So a decent head and MZ65 would make a pretty big difference

Ha ha ha, yea, yea double your power. Making 1hp now, so 2hp.

 

[Gordy]

Ha ha ha, yea, yea double your power. Making 1hp now, so 2hp.

Hp is hp