pump spring 3200 or 4000 rpm
#1
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pocat (10-24-2009)
#7
ive ran both springs and liked the 4000 spring better. not that i ever took the rpms that high, I felt the spring just made the truck perform much better. oh ya the 4000 spring is longer than the 3200 and should be shortened up to work right. believe me you will like it if you have a manual trans, never ran one in an auto.