NorthernBloke Posted January 21, 2018 Share Posted January 21, 2018 Can anyone confirm the thread size & pitch for the exhaust manifold bolts only I've snapped one and need to buy the right Tap set, it measures as M6 with my calipers but there is conflicting info on the pitch, can anyone confirm thanks. BTW it already has Allen bolts which appear to be steel it there any other material that won't corrode into the Alloy head, Stainless, chrome, Titanium ? Quote Link to comment
Dezza Posted January 21, 2018 Share Posted January 21, 2018 (edited) Sounds small - the exhaust bolts on my EFE head are 8 x 1.25 and I would have assumed the ES was the same. I use stainless with a bit of copperslip on the threads and all still original. Edited January 21, 2018 by Dezza Quote Link to comment
Gixer1460 Posted January 21, 2018 Share Posted January 21, 2018 Deffo M8 x 1.25. I like using stainless steel studs with brass nuts - damn sight easier fitting manifold single handed using studs! Quote Link to comment
NorthernBloke Posted January 21, 2018 Author Share Posted January 21, 2018 Thanks guys everywhere seems to say M8 but unless my eyes are playing up they measure 6 mm across the shank of the bolts. I have some titanium fork bottom pinch bolts from my old zx9r that fit but I can’t find their size either. Quote Link to comment
Fazz711 Posted January 21, 2018 Share Posted January 21, 2018 May have had a die run down to go to 6mm after stripping 8mm ones Quote Link to comment
Gixer1460 Posted January 22, 2018 Share Posted January 22, 2018 15 hours ago, Fazz711 said: May have had a die run down to go to 6mm after stripping 8mm ones All to save the cost of a Helicoil.................tight bastards! LOL! Quote Link to comment
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