[email protected] Posted May 11, 2008 Report Share Posted May 11, 2008 iv looked everywere for info on this. 4k have valve springs that are 70lb and 5k use 77lb springs, i can get 5k ones for free but want to know if they will fit in the 4k and 3k seats?. :D Quote Link to comment Share on other sites More sharing options...
philbey Posted May 13, 2008 Report Share Posted May 13, 2008 get them, measure them, there's your answer? I've only got dismanteled 5ks, so I couldnt tell you. Quote Link to comment Share on other sites More sharing options...
[email protected] Posted May 14, 2008 Author Report Share Posted May 14, 2008 (edited) i also have a cracked 4k-u head, the dished piston type head, would these have 5k spring in them cos a 5k sometimes has dished pistons so does anyone know the fact behind this? point is if they are the same than sourly the 5k springs will fit in a 4k. Edited May 14, 2008 by [email protected] Quote Link to comment Share on other sites More sharing options...
beerhead Posted May 15, 2008 Report Share Posted May 15, 2008 Yes they definitely fit. I used to run them on my old 4K. Quote Link to comment Share on other sites More sharing options...
[email protected] Posted May 15, 2008 Author Report Share Posted May 15, 2008 sweet now alls i have to do is buy a new valve clamp, my old one was left outside for a few weeks when i lost it and it rusted up and went all shit on me lol. Quote Link to comment Share on other sites More sharing options...
LOWKE30 Posted May 25, 2008 Report Share Posted May 25, 2008 save yourself the trouble and buy a new set mine cost $90 from performance springs my highly modded 4k hits 8500 rpm no bounce at all for the record they seat at 90lb the part number is cb4a-8 hope this helps ya! Quote Link to comment Share on other sites More sharing options...
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