The impreza valves and springs are used when converting to solid lifters instead of hydraulic lash adjusters. You have to grind your cams on a base circle that roughly matches your valves and lifters and then get the correct shims to fine tune the lash adjustment.
Quote:
Originally Posted by STeeL25T
I have another question about building up the motor if its okay to ask here.
I've been looking into cams lately, I've been wanting to keep the stock springs and valves cause it sounds like a lot of work to convert them over to WRX parts... Well a good friend of mine recently had his built STi blow up the second time and hes considering going back to stock, and I told him I'd take two of his rods and the heads if he wanted to get rid of them.
What all is involved in going swapping over the head parts? I'm severally intimiated by this as I have no experience with head work..
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