Best headers collector bolts????'s

565bbchevy

Geezer
Aug 8, 2011
9,265
113
Michigan
I've usually use grade 8 yellow zinc plated bolts, nuts and lockwashers and sometimes stainless bolts.
 

81cutlass

Comic Book Super Hero
Feb 16, 2009
4,362
113
Western MN
Not the answer you are looking for cut cut the flanges off and get a euro joint style collector.

They are a ball coupler but use a single bolt radius clamp to lock them together & they don't rattle loose.


It's all I run now.
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CopperNick

Royal Smart Person
Supporting Member
Feb 20, 2018
2,377
113
Canada
There is a ball and socket variant that uses the three bolt configuration. With the three fasteners you can have a little misalignment and still tighten it all up.

As for the bolts, it is not the bolt that determines the tightness, it is the nut. If you want a nut that won't back off, then I would suggest scoring some Stover Nuts and using them. The big difference with the Stovers is that they are crimped at one end into a triangular shape that forces the threads to really grab the bolt. They are a one shot deal in that they can only be used once and then have to be replaced but hey, great for security.


Nick
 
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565bbchevy

Geezer
Aug 8, 2011
9,265
113
Michigan
Not the answer you are looking for cut cut the flanges off and get a euro joint style collector.

They are a ball coupler but use a single bolt radius clamp to lock them together & they don't rattle loose.


It's all I run now.
View attachment 210365

Or just get some stainless flanges with V-band clamps, I have 4 of them on my Monte to drop out the H-pipe to give me room to work.
2 for the 4.5" collector and 2 for the 4" tailpipes.


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ELCAM

G-Body Guru
Jun 19, 2021
804
93

Prevailing torque nuts. Lots of different designs, obviously the nylon ones don't like heat.

 

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