Hello, this sale is for a pair of completely assembledaluminumsmall block chevycylinder heads. These heads will fit all 262-400cid engines from 1955 through 1999 and are nearly identical to ProComp Motorsports heads part number P3002S. The heads have provision for either center bolt or outside bolt hole valve covers. They will also accept either Vortec or the early style intake manifold. If you are thinking about building any type of high preformance small block Chevythese heads are the only way to go. They will save you about 30lbs on weight over stock iron heads and will give you 30-50 more horsepower then OEMGM production heads.These heads are cnc machined and assembled by us. These heads work great on Carburetor and fuel injection engines and no special gaskets needed.The specs on the heads are as follows:

Intake/Exhaustport volume: 190cc/72cc

Combustion Chamber volume: 64cc

Valve size: 2.02x1.60

Valve Springs: Single with dampner 105lbs closed pressure. Springs will accomadate .550 lift.

Flow figures:227 cfm @ .500 Intake 179cfm @ .500on the exhaust. Full flow figures available at the bottom of the sale.

This pair of heads are a direct replacement for anyOEM smallblock head. AllOEM bracketry and accessories will fit.If you have any questions feel free to e-mail. Thanks for looking and happy offerding. these heads are comparable to Edelbrock,dart,pro comp,merlin,rpm,trick flow heads. please look in store inventory for may nice parts and most of it also offers FREE shipping!!!

We also offer the correct needed parts for these heads for out of box installations with sale numbers

230980039506 correct cyclinder 12 point head studs

230838635541 correct 3/8 flat guide plates

230838635556 correct 5/16 raised guide plates

230838635566 correct 1.5 x 3/8 stainless steel full roller rockers

230897045318 correct 1.6 x 3/8 stainless steel full roller rockers(35hp gain)

230838697193 correct 3/8x7/16 screw in rocker studs

Intake Flow

Exhaust Flow

Intake Flow

Exhaust Flow