we now have a valve spring kit with titanium retainers for LS1’s and LS6’s that offers substantial savings and improved performance over other valve springs and retainers currently offered. The springs that come in the kit are part #EX-615 which we’ve been running in some of our own cars for quite a while to make sure they are up our standards. In our Z06, we’re currently shifting at 7200rpm with this valve spring kit and a .591” lift cam and in our 2001 SS we’re running a .615” lift cam shifting at 7100rpm. The springs fit on the stock heads/seats without machining, just install and go!

The EX-615 springs setup at 135lbs at 1.800” installed height, open up to 360lbs at 1.200”, and don’t coil bind until 1.110”. We recommend a cam under .620” lift as that is what we’ve tested to, but the springs can handle a little more. The retainers, part #EX-122, are aircraft quality titanium and offer the ultimate in high-end valve train performance. For a few pictures of the EX-615 springs and EX-122 retainers, check out www.cmotorsports.com/615springpics.html

Just a more affordable alternative (and better peroformance on top of that) to the Comp Cams 918's or similar. Thanks for your time!

 

Nice!!!