Quote:
Originally Posted by 1LE Red Dragon
The 1598 Kit is the LS3 Kit. The L99 kit has a bigger pulley to run less boost and there are some other differences. But I am really not sure what would need to be purchased. That would have to be ansered by Edelbrock. I am sure somebody on the forum knows, and has done it. But I am not really sure. Sorry.
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The Valley plates are the biggest differences between the two kits.
I bought the L99 Kit and in the middle of the install decided that since I was right there, I would do the Cam conversion as well, so I had to source the valley plate and the 3.5in pulley for the LS3. I ended up paying close to $300 for the valley plate, and the pulleys are readily available.
I have the left over L99 valley plate and the 3.85 pulley. You will reuse your stock Oring gaskets from your stock valley plate on the new eforce L99 valley plate.
On my SCT Tuner, I had the ability to install the LS3 and L99 tunes, so the OP may want to check that the L99 tune is on the SCT.
Let me know if your interested in the L99 parts for the Eforce.