speedfreak2685

iTrader: (12)

There are a set of afr 205cc heads on a c5 zo6 I just bought. I'm eventually throwing a good size cam in it as well. My question is, which would make these heads shine more with the cam. 1 3/4" or 1 7/8" primaries? Im looking for overall power gain. Sorry if this has been covered. I'm on my phone and can't get search to work.

Rise of the Phoenix

iTrader: (27)

1 7/8 without a doubt. Get that size and don't look back.

speedfreak2685

iTrader: (12)

Kinda what I thought but figured I would check. Just wasn't sure with those small bore heads which would be more efficient.

Rise of the Phoenix

iTrader: (27)

1 7/8 headers are going to make more power on a bolt on only car over the 1 3/4 headers every day of the week and twice on Sunday. Those AFR heads are badass and you'll want the larger primaries to expell all the air they will flow.

speedfreak2685

iTrader: (12)

Sounds good to me. Thanks for the input!

dr_whigham

iTrader: (49)

Speaking from experience... Exactly what Rise said. Go with the 1 7/8"

speedfreak2685

iTrader: (12)

Thanks for the help!