Flow Valve Spring Upgrade Kit. This kit contains higher rate valve springs and special retainers that will allow you to use a performance cam up to .542” l ift on OEM cast iron heads without machining. The installation is quite simple and can be done without removing your cylinder heads...
You can't imagine how hard it can be to get even the simplest idea into a cylinder head, or ``block head'' as we used to say. They never made skulls that thick. Open 'em up and it's obvious that they're basically just ``air heads.'' Ain't nuthin' under the hood. There ...
Usually has a spring-loaded piston which, when triggered, retracts rapidly from a cylinder to leave behind an evacuated volume. I guess I should be embarrassed to admit that I have found these to be a lot of fun. Consider EDSYN's Challenger Soldapullt ® ``External main spring design...