Holden 6 and Chevrolt 230, 250, 292 manifold stud and nut kit. The manifold studs are 3/8 UNC on the short side and 3/8 unc on the long thread side. The AS022 steel tabs still have a 3/8 clearance hole and is supplied with 3/8 unc brass nuts. This kit does not have the reduced stud size like the other kit. On some applications the studs may need to be cut shorter depending on manifold and exhaust shape.
Please be sure to read the description
The kit includes
2x 3/8 unc extractor bolts with reduced head
2x 3/8 spring washers
6x 3/8 unc unc manifold studs 45mm long.
6x 3/8 spring washers
6x 3/8 unc brass nuts
6x 10mm assorted steel retaining tabs with 3/8 centre hole
A few hints that might help when installing you manifold, extractors and stud and tap kit. Buy a 3/8 unc tap to clean out the threads in the cylinder head. use a quality thread sealer/ low grade thread locker on the studs into the cylinder head. Using a stud remover installer can help stop damaging the threads when installing the threads. If the exhaust manifold/ extractors and intake manifold are different thicknesses you can buy 3/16 key way steel pretty cheap and tack weld it to the tabs to keep the tab height even. The time spent aligning and getting the clamps to sit right will give you a better seal on the gasket face. We would suggest when using the reduced size studs that a manifold brace be used once you have the intake and exhaust manifold bolted to the cylinder head.