$2,399.99
2.125″ 50° Stainless Steel Intake Valves • 1.600″ 45° Stainless Steel Exhaust Valves • 1.550″ Manley Double Roller Valve Springs (.710″ Lift) • 10° Manley T-Retainers • 10° Machined Locks • P/C Valve Stem Seals • Hardened Spring Seats • Screw In studs & Guide Plates Supplied • Professionally Assembled
- STS 233cc Fully CNC Ported Int/Exh Runners
- Rolled Radius 50° Intake Flows 326cfm @.700″
- Rolled Radius 45° Exhaust Flows 233cfm @.700″
- 68cc Standard Chambers For Large SBC
- Completely CNC Ported, Not Just Bowls & Chambers
- Angle Plug Spark Plug Location
- Standard Intake & Exhaust Valve Center-lines
- Standard Exhaust Patterns
- 7/16 Studs & Guide Plates Included
- Manley 1.550″ .710 Lift Roller Springs
- Manley T-Retainers with 10° Locks
- 40/60 Valve Spacing (requires special stud girdle)
- STS 233 is Available in Top End Complete Combo Kit
- New BP HH SB O 229 Fully CNC Ported Heads (ava)
- Rolled Radius 50° Intake Flows 325cfm @.700″
- Rolled Radius 45° Exhaust Flows 236cfm @.700″
- A356 T6 Virgin Aluminum Alloy
- Milled End Pads & Increased Deck Thickness
- Ductile Iron Valve Seats
- Bronze Alloy Valve Guides
- Fits Standard Chevrolet Style Blocks
- Utilizes Existing SBC Intake Manifolds
- Standard SBC Header Pattern
- Standard SBC Roller Rockers
- Accessory Bolt Holes in Stock Location
- New Oval Port 227 is Available in Top End Combo Kit
Options & Upgrades
64cc Combustion Chambers
+ $100.00
Titanium Intake Valves
+ $795.00
Harland Sharp 1.5 Ratio S1004-050 Offset 7/16″ Stud Mounted Rocker Arms
+ $324.99
ARC Professional Series 40/60 Valve Spacing Stud Girdle
+ $195.00
Jesel KPS-01302 Pro Series Shaft Rockers (add $75.00 for set up)
+ $1469.99
Manley New Comp Springs .850″ Lift
+ $295.00
STS 233 Complete No Hassle Top End Combo Kit
+ $3495.00
New BP HH SB O 229 Complete No Hassle Top End Combo Kit
+ $3495.00
ARP 234-4301 Head Stud Kit
+ $224.99