Generation III Internal Engine - spring install help

i'll be installing comp 918's on my stock 852 heads. can i reuse all the stock stuff or do i need new seats and retainers?

thanks

It is preferable you do get new seals. Don't forget to install springs at correct height as well.

I installed mine with all stock retainers and locks no problem...

ok cool. this is just a budget build until i can convince myself what the next big build will be. so i'll be using the stock parts for now.

thanks guys :cheers: