SB-Chevy High-Flow 197 Aluminum Heads 2.055" Int/1.60" Exh Valves

Name: SB-Chevy High-Flow 197 Aluminum Heads 2.055" Int/1.60" Exh Valves
Brand: JEGS
SKU: 555-51441
Price: 718.99 USD
Availability: OutOfStock

Currently Unavailable

This product is no longer available. Please call customer service for assistance at 1-800-345-4545.

High-Flow 197 Aluminum Cylinder Heads - 197cc Intake Runners, 64cc Combustion Chambers

2.055'' Int/1.60'' Exh Valves
1.440'' Springs, .680'' Max Lift Soild/Flat Tappet, Hydraulic Roller Cams
Straight Plug
Sold as Each
Flow Chart

JEGS Cylinder Head Specifications
Part # 51441 23 degree valve angle, straight plug design, SB-Chevrolet
Materials
Casting: A356-A Virgin Grade, Heat Treated to T-6
Valve Guides: Manganese Bronze
Valve Seats: Alloy, For use with Unleaded Gasoline
Combustion Chamber: 64cc
Intake
Port Volume: 197cc
Valve Diameter: 2.055' Stainless Steel #555-20561
Valve Length: 4.910'
Valve Stem Diameter: 11/32'
Valve Stem Seal Diameter: 531' PTFE
Port Dimension: 1.300' x 2.050'
Flow: 259 cfm @ .700' lift 28' of water
Gasket: JEGS # 555-210001
Exhaust
Valve Diameter: 1.600' Stainless Steel, #555-20566
Valve Length: 4.910'
Valve Stem Diameter: 11/32'
Valve Stem Seal Diameter: .531', PTFE
Port Dimension: 1.490' x 1.340'
Flow: 203cfm @ .700' lift 28' of water
Gasket: JEGS # 555-210050
Valve Train
Stud Size: 7/16', 7/16' 14 x .875'(bottom)) 3/8' 24 x 1.950' (top), #555-20525
Guide Plates: JEG?S # 555-20521 (5/16' pushrods)
Retainers: Chrome Moly Steel 10 degree, #555-20530
Valve Locks: 10 degree
Pushrods: 5/16' Heat Treated, Must Check Length
Springs: 1.440' .680' Maximum Lift, Solid/Flat Tappet & Hydraulic Roller, #555-20540
Spring Cups: .570' Inside Diameter Locater, .060' thick #555-20555
Accessories
Head Bolts: Stock Dimensions Recommend 12-Point Head
Head Studs: Stock Dimensions Recommend 12-Point Head
Spark Plug: 14mm, .460' reach 5/8' Hex with Tapered Seat
Stud Girdle: Stud Location Custom JEG'S #555-20500
Head Fastener Washers: Use Quality Hardened Washers
Accessory Bolt Locations: Stock Placement
Torque Specifications
Rocker Studs: 45 ft/lbs.
Manifold Bolts: 35 ft/lbs.
Head Fasteners: See Manufacturers Specifications