Rebuilt 2.02 Sbc # 186 Double Hump Cylinder Heads Chevy # 3927186 on 2040-parts.com

Up for sale is a professionally rebuilt pair of #186 Small Block Chevy 2.02 double hump cylinder heads. Casting number is 3927186. The heads are dated L178 & H289 (December 17, 1968 & August 28, 1969). The heads have 64cc combustion chambers with new 2.02 stainless intake and new 1.60 stainless exhaust valves. The 186 is one of the best closed chamber cylinder heads of the late 60’s early 70’s. The 186 heads are very rare as they are some of the last closed chamber heads with the highly sought after accessory holes on the ends. Heads have been hot tanked, shot blasted, & magnafluxed. These heads have been completely rebuilt with 8 new hard exhaust seats for unleaded fuel, 16 new thick wall bronze valve guides, a 3 angle valve job, 8 new 1 piece stainless intake valves, 8 new 1 piece stainless exhaust valves, & 16 new performance chrome silicon valve springs good for up to .550” valve lift (closed pressure is 110# at 1.800”, open pressure is 325# at 1.200”). The heads have also been resurfaced .006” for a perfect head gasket seal. These heads are also machined for screw in studs with guide plates (not included in auction). Heads are then thoroughly washed and fully assembled with 16 new premium PC Teflon valve stem seals, 16 new valve spring retainers, and 32 new heavy-duty keepers. All valves and valve seats have been checked for a perfect compression seal. There is no porting or polishing on any intake port, exhaust port, or any combustion chamber. All threaded bolt holes are good. The heads come as pictured and are ready to install. The heads pictured are the actual heads you are bidding on and will receive. The double hump heads were factory installed on all High Performance Fuel Injected and carbureted Chevrolet vehicles including Corvette, Camaro RS SS & Z-28, Chevelle Malibu, Chevy II Nova, Bel Air, & Impala. These heads will also interchange with other camel hump heads with casting numbers 461, 461X, 462, 291, 292, 186, 041, & 492. These heads will fit all 265, 283, 302, 305, 307, 327, 350, & 400 small block Chevy engines from 1955 to 1986 with no modifications (steam holes will need to be drilled for a 400) and 1987-1999 with correct intake manifold (except 1992 & up LT-1 reverse flow). I tried to list everything about these heads but please ask any/all questions before buying. Payment must be received within 3 days or item will be re-listed unless other arraignments have been made in advance. Shipping, handling, & insurance is fixed at $90.00 for both heads shipped to the continental US only. Alaska, Hawaii, and everywhere else will be higher. All international bidders please multiply the shipping calculator by 2 for two boxes. If you are outside the continental US & purchase the heads please do not pay until an adjusted invoice is sent to you with the added shipping costs. Thanks for looking.