Skip to main content ↑ ↓
Topic: Header nut size (Read 704 times) previous topic - next topic

Header nut size

Does anybody know the correct size/thread for the  stud nuts on stock shorty headers? Ive tried 4 or 5 different nuts but they  only tighten barely tighten before they get too hard to turn anymore.
FOXLESS!!

1994 Lincoln Mark VIII

Header nut size

Reply #1 –
I know it is 7/16 stud and I think it is 7/16-13???




SCT Tuned by Me(Greg@SpeedyDyno.com)

E.T. 10.28 @ 136.5 MPH 1/4 mile: List of Mods; 351 EFI, AFR heads,AOD,Rousch 13in frt brakes,11in rear brakes, AirRide Tech air ride system, Sub frame connetors,2400 RPM stall, 3.50,BBK shorties,T62PT Turbos  air to air intercooled, Home built kit.
Car weights 3705lbs without driver:burnout:

Header nut size

Reply #2 –
Awesome,  thanks man
FOXLESS!!

1994 Lincoln Mark VIII