View Full Version : Preferred Header Bolts for use with 2nd Gen Coyote
Alan_C
01-07-2022, 10:09 PM
The design of my headers requires the use of header bolt in places as there is inadequate clearance for the OEM studs. What brand of header bolts are people using that they are happy with? I worry a bit about using stainless steel bolts into a aluminum block. Is there a special anti-seize compound to use if using stainless bolts?
jiriza84641
01-13-2022, 02:19 PM
replied to your FFcars post
I used stage 8s. No issues.
JohnK
01-13-2022, 06:04 PM
I used the bolts that Edwardb recommended here (https://thefactoryfiveforum.com/showthread.php?36454-Header-bolt-recommendations&p=416915&viewfull=1#post416915), along with Remflex gaskets and a dab of ultra copper RTV as a thread locker.
Alan_C
01-14-2022, 04:17 PM
My original concern was I was supplied bolts stamped as ARP. When I checked the ARP website, they did not show a header bolt for use with the Coyote, 10MM x 1.25 in my case. I reached out to the header manufacturer, Ultimate Headers and they did not respond. I then called ARP and they assured me that the bolts were indeed made by them. Apparently manufacturers, like Ultimate Headers, buy bulk bolts and then repackage them with the products they sell.
So the bolts are good and I have copper anti-seize on the way.
Since I do not have the locking mechanism as in the Stage 8s, I was thinking about using a dab of copper gasket maker just below the head of the bolt to limit their potential movement.
Thanks for the replies,
Alan