[gtofreek]

The seal for 11/32" x .530 is VS-529. The VS-530 will work also, but the 529 fits the giude better. VS-530's fit too loose on some guides cut to .530 as some cutters don't cut them exactly to .530". I use the VS-529 and all these applications. I don't even use the VS-530 anymore as some have just pulled right off the guide.

Before you cut the guides down, install the valve, and retainer, with keepers, and measure the distance between the guide, and retainer. Then, when you cut the guide down, be sure to cut it .200" deeper for the seal, and add at least another .050" for seal to retainer clearance at full lift.

So, if you measure .500" between the guide and retainer, and you are running a cam with, lets say .525 lift, then you need to cut the guide down at least this much:

.525" lift, + .050" clearance, + .200" for seal = .775" clearance between retainer, and guide, after cutting it down.

Definitely buy the .530" cutter, as it leaves the guide thicker at top, and less likely to crack or break later on. Plus, .530" seals are usually easier to come by. I stock much more of them than I do the .500" seals. I reserve the .500", and .480" seals for triple springs where you need a small OD body on the seal to clear the inner spring.