The tread is tappered so as you srew them in it binds against the standard tap thread in the block to form a pressure seal. Usually installed with plumbers thread tape wrapped around the thread of the plug to help it seal.
Make sure you check your sizes required in your engine before you order. They do vary in size. You may have to retap your block depending on thread type, these are not so easy to source in different thread sizes.
All our bolt kits are available for resale. We can tailor & package a bolt kit in Polished Stainless or high tensile steel to your requirements in small or large quantities.
#1 Bulk stocker & supplier to the trade, & retail outlets, of AussieSpeed Products
Victorian distributor for Performance Weaponry stainless steel merged collectors, mandrel bends, race cats, header kits, flange plates & more ..
Product Photos
All Kustom Bitz web site product photos are of the actual part and not a studio enhanced up image. We keep it real.