For sale: brand new GM performance valve springs, retainers & keepers. Valve springs: part # 12495494 retainers: part # 19171528 keepers: part # 12495503 These cost approx $66.00 - $68.00 plus tax & shipping. I bought this stuff for the ZZ4 cam I have, but the springs are too big to fit in the stock L98 heads I have. I don't want to cut the heads because I'm trying to keep it a low dollar build. So my loss is your gain. I would like to get $50.00

Here is some more info.
These springs were originally used on the 1996 Corvette LT4 engine. Also used on all 1999- Current ZZ4,Fast Burn 385 engines, Fast burn heads, Lt4 heads, and are included with the LT4 hot cam kits.Outer diameter of 1.34" , 101 Lbs pressure @ installed height of 1.78", solid height 1.22" Spring pressure with valve open is 332 lbs. made of high quality silicon ovoid wire. Color coded green.

I dont know what your deffinition of lower dollar build are but I had a set of iron L98 heads cut for those exact valves, converted to screw in studs, and guideplates (including he actual guide plates) for under 200 at a shop in Aurora.

Hey Jeff how are those heads and valve train working out for you?

Ya, I have a good machine shop guy I could take these to but I'm trying to avoid doing anything to the heads right now. I'm going to buy springs that have the stock dia. All I'm doing to the engine is a clean-up. It's pretty much stock everything except Cam / Intake & Headers. This is for my teenage son's car. In a couple of years I plan on going through the engine completely. But for now just looking for a good mild runner.

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