Rev Pro Standard& New (2015) REDS Clone Progressive Valve Spring Set (10.8) 100% AKRA / WKA / Burris Legal
These springs start out low tension (better acceleration) as they compress they multiply more poundage than many other springs on the market today. This will allow the engine to rev more rpm's before valve float.
NEW for 2012 >> The Springs are Cryo Treated for longer life and come as a MATCHED set..
Average spring readings (This will vary slightly from head to head)
** .850 check @ 10.2 to 10.5 lbs (10.8 is max allowed)
** .650 check @ 17.0 to 175 lbs ( 18.0is max allowed)
** .615 check @ 18.5 to 19.5 (no max in the rules)
New for 2015 is the REV PRO "REDS"
Average spring readings (This will vary from head to head
** .850 check @ 10.2 to 10.5 lbs (max 10.8 lbs)
** .650 check @ 17.5 to 18.0 lbs (max 18.0 lbs)
** .615 Check @ 19.5 to 20.5 lbs (no limit)
**** For best performance its advised to change out springs atleast every 6 race days on OVAL Tracks. Road Course sprint tracks every 2-3 races due to the extra time on the track and excessive rpm's..