The oil lines to the valve covers? No, I didn't add any restriction to them. The holes in spray bars aren't very big but I ran them just the way they came from Indy. I didn't make any mods to the valve covers.

When I first got these parts I really didn't think it would work with the heavy springs so I called Indy. The guy I talked to said that they run all their Jesel setups with spray bar oiling and it works just fine. Well it didn't work very well for me. I don't think I damaged any parts but the several of the pushrod ends were blue after just a few dyno pulls so I know it was headed south in a hurry.