I'm doing the 3fe exhaust mod and I'm not sure my existing intake manifold is going to work out. It's not cracked, but you can see the eroded aluminum. Is this okay? I'm not looking for a ported intake, but will this be a future problem?
As I guessed it's not completely flat. It's off by 0.020.
As I guessed it's not completely flat. It's off by 0.020.