I agree with all- did the same swap on my civic- HAD to upgrade prop valve otherwise it feels like crap.

it will say 3040 or 4040 on the cylinder- it is easy to see on the firewall. hint- its easy to do but more annoying that you would think with traditional hand tools since you cant turn the bolt that far.

also upgraded at the same time to stainless lines and that made it feel real good.