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mon-thurs 9-5 cst
For most racing applications they require the exhaust studs or bolts to be safety wired to prevent the bolts or nuts from backing out. Most opted for using Allen cap head bolts that are predrilled as an easy replacement for the studs.
The M8x35 Studs fit most of the 196cc 6.5hp Clone engines including Honda GX200, Ducar 196, Ducar/Tillotson 212E, Tillotson 196R/RS, Tillotson 212R, Tillotson 225RS, Ducar/Tillotson 212E, Predator 212 and BSP 196 and 212 cylinder heads.
Torque Specs: 200 in/lbs
AKRA 2020 Rules on Header Studs
Allen Head Bolts permitted on the header to head.
NKA 2020 Rules on Header Studs
188.8.131.52: Studs on exhaust may be replaced with regular threaded bolts of equal diameter and must be safety wired.