I have a jdm non vtec 1.3L i converted it to FI from my donor d15. head gasket is the same as d15. What head could i run to increase my power and or mpg a little. not building a street car jus wanna get into moving traffic..lol i only got 70 hp. well that was b4 the FI swap so maybe a few more. Also whichever head you guys recommend is it jus a bolt up? same timing belt and all? i am very knew to this i did a search but d13 is rare