use a stock manifold and port it, mine was running close on 400bhp..lol
Nick
How/where do I go about getting a stock one ported???
Scrap yard and dremil is the best way to go.
I will have look to see if i have an old one in the workshop.
I pushed a little under 400bhp on my k04-001/023 hybrid with NOS no crack, now its running on our AGU development k03s WMI setup at 261bhp 280lbft