hey guys just looking for some firiendly advice cuz im lost in my own decisions. needless to say i have my engine completley tore apart in the middle of a turbo build and am at the dillema of needing to put some cam bearings in it, but the machine shop wants the pistons and everything out to do them. so since im already this far im trying to figure out if the 4340 rods and federal pistons are really worth the extra money or not... i know that there lighter n all that good ol noise but that adds another almost 1500 after machine shop work n such. The current build im on im looking for 600whp on a s259 turbo and e85 and was planning on just using the stock bottom end not touching a thing but if i have to take it all the way down would the money to build it be justifiable? and if anyone has done this was it really that big of diff? thanks guys!!!!!!!!