i have a built b18b with a built bottom and the head was port and polish with dual springs and retainers,ferrea 1 mm over valves, and currently running 402t. crower cams. i was told that the 404s will give me more. will it make a big difference putting in those cams or i'm i better of staying with the 402t?

No help

404s where my first plan but i heard you really need a good tuner becuase its so hard to tune them. how are those 402t? thats what am thinking of going now. just saving the money for them

yea u can use 404's for a turbo application, a lot of ppl have had good sucess with those cams and they make more power than the crower 402-t's

the 402's work good i got 320whp on 16psi with them.

i guess i will be buying 402t. also nice numbers

you would make more with the 404s somebody i know has a b18b running 14psi made 380, he has a stock block, port&polish, valves retainers all that. I also agree that you need a good tuner to run them properly, it seems like if its not tuned properly it feels like almost dying when at idle, regardless would rip sooo hard if u step on it