No offence to anyone out there, but cosmetic mods or bolt on kits bore the hell out of me. I like cutting, grinding, welding, etc. The more 'real' modding the better. So I'm gonna post some tricks I've learned along the way for discussion. First one is the Singh Grooves. Anyone ever heard of them? Better yet, anyone tried them? The theory behind it is to create a more turbulent mixture in your combustion chamber to help thwart detonation. Every single 2.9 or 4.0 Ranger I've been in pinged it's brains out under load. So this could be a way to get rid of it. I don't put an engine together without adding the grooves. Does it help? Damned if I know.. But I can tell you one thing.. I've never had an engine ping since I found out how to do them. I don't have a Ranger head lying around, but I do have one I have 90% completed for my Harley Sportster. So it will give you a good idea what the grooves look like.