I have a 99 civic with an LS swap b18b1 in it i want to know will i make power with a b20 head on an LS block and how much power will i get and please dont tell me that i need a vtec head beacuse i got a b20 head from my friend who is doing b20vtec so i got the head for free

 

B20 head has chambers for the 84mm pistons, not the 81mm like a B18 has. I wouldn't do it

 

x2

 

wait i thought the head was the same

 

The stroke is the same (89mm) but the pistons chambers are not.