World Products SB-Chevy Sportsman-II Heads

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The Easiest Way to Bolt On 30-70HP!

Continuosly improved since it's 1987 introduction, the World Products Sportsman II is still the industry's most popular cast iron high performance head. Featuring RightCast 200cc intake runners, Fast-Burn chambers and your choice of angled or straight plugs, they're good for 30-70 HP increases right out of the box. They are the aftermarket's only 50-state emissions legal cast iron high performance cylinder head (EO #D-343-1). You should also know that all World Products heads are percision CNC-machined, and indexed off the chambers to assure perfect alignment with the cylinders. Only World offers complete assemblies with genuine Manley stainless steel Street-Flo or RaceMaster valves and other quality components including springs, retainers, keepers, screw-in studs and guide plates.

Material: High density cast iron
Valve Seats: Integral intake, hardened steel exhaust
Valve Guides: Integral cast iron
Valve Spring Seats: Machined for 1.250'' and 1.550'' springs
Valve Sizes: 2.020'' x 1.600''
Rocker Arm Studs: 3/8'' screw-in style with hex-shoulder
Accessory Flange: Stock locations, 7-bolt universal pattern

Included In Assembly: Manley Street-Flo (-1 models) or Manley RaceMaster (-2 models) forged stainless steel valves with swirl-polished heads, ring and band-style seals, valve springs, Manley 7° chrome moly retainers, keepers and guide plates.