Stock or a suitable after market. I would probably rather have an after market, but I don't know what shape I have to start with. My engine has been peiced here and there since the guy I got it from cabbaged the exhaust mani, turbo, intake, oil lines, and intake track. If I had a stock piece I would probably want to make it bigger
. LEt me know I would take a stock one if the price works. Thanks for replying all.