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Vehicle Info NeededAFR - AIRFLOW RESEARCHPART NUMBER: 033-1845
1845 260cc LS3 Mongoose Street Aluminum Cylinder Heads GM LS Chevy Block
$2,86920$3188.00You Save$318.80
3 left in stock
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Lowest Price GuaranteeLS BlocksFour Head Bolts Per Cylinder
- 260cc LS3 Mongoose Street Aluminum Cylinder Heads
- GM LS 4-Bolt Chevy Blocks
- 69cc Combustion Chambers
- Rectangle Intake Port
- Assembled
- Pair
LS Chevy 260cc LS3 Mongoose Basic Package Components 100% CNC Ported Combustion Chambers 100% CNC Ported Exhaust Ports 100% CNC Ported Intake Ports Competition 5-Angle Valve Job 8mm Bead Lock Intake Valve, 2.165" x 5.195" Overall Valve Length 8mm Bead Lock Exhaust Valve, 1.600" x 5.200" Overall Valve Length PAC Racing Spring 1.270" OD Hydraulic Roller Dual Valve Spring, 155 lbs. on seat, Max RPM 7000-7200 7° Titanium Retainers 1.245" O.D x .885" I.D x .655" I.D 7° Bead Lock Valve Keepers Viton Valve Seals .600" O.D x .495" I.D. Hardened Valve Spring O.D Locator 1.380" O.D x .570" I.D. Ductile Iron Intake Valve Seats 2.200" O.D x 1.750" I.D x .375" Deep Ductile Iron Exhaust Valve Seats 1.650" O.D x 1.350" I.D x .375" Deep 8 mm Bronze Valve Guides .502" O.D x 2.550" O.A.L. Rocker Rail Stand LS Chevy 260cc LS3 Mongoose Street Head Specifications Material A356 Aluminum Intake Port Volume 260cc Intake Port Dimension 2.610"H x 1.300"W x 7/16° Radius Intake Port Location Stock Exhaust Port Volume 95cc Exhaust Port Dimension 1.540" H x 1.760" W Exhaust Port Location Stock Combustion Chamber Size 69cc Valve Cover Bolt Pattern Center Bolt Valve Angle 12° Valve Spring Pocket Diameter 1.490" O.D. Max Valve Spring Pocket Machining 1.510" O.D. Deck Thickness 0.750" Minimum Bore Diameter 4.000" Flat Mill - 65cc chamber .006" per cc 62cc Maximum Minimum Cross Sectional Area 2.875 sq. in. Spark Plug Dimensions 14mm x .750" w/Gasket Seat Carb EO# D-250-5 Intake Port Gasket Factory GM or Aftermarket Exhaust Port Gasket GM #12558573 Head Gasket Cometic 4.160 Bore Size Head Bolts (04+) ARP 134-3610 Head Studs (04+) ARP 234-4317 Head Bolt Washers Manley Suggested Manifold FAST 92mm or 102mm Spark Plug Starting Range NGK TR55 Rocker Arms Use full roller rocker arms, roller tip rockers with stock style bodies are NOT recommended. Pushrods Different length pushrods might be required, always check pushrod length. Check pushrod clearance with heads placed on the block before final assembly. Larger pushrods will not fit without clearancing and is not recommended since some areas are very thin. AFR recommends the use of .120" thick-wall pushrods. Spring Installation To ease installation with 1.550" O.D or larger springs, 12 pt head bolt or studs are recommended for extra clearance. Beveled or ground washers might be needed (ARP #200-8504 comes with smaller O.D and doesn't need to be ground)
Part TypeCylinder Head
BrandAFR - AIRFLOW RESEARCH
Package Height9.0
Package Width19.5
Package Length23.0
Weight65.0 PG
Part CategoryPerformance Parts
Maximum Valve Lift0.65 in (16.51 mm)
Part FitmentSemi Universal
Vendor Part Number1845
Package Qty1
Package TypeEA
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