Quote:
Originally Posted by undy
What's the history of the heads? New? reworked OEM?
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See my other thread -
high throttle miss.
I bought these new from Jegs. Apparently these were manufactured right around the time AFR switched spring manufacturers. AFR thinks I may have gotten a set that wasn't heat treated. We went over the geometry of the rockers and cam but didn't find anything amiss. I had two springs fail within 500 miles causing valve float and a high speed miss. I'm hoping it didn't do more damage - will see when the heads go to the machine shop.