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-18X Series Cylinder Heads68cc Combustion Chambers Standard Exhaust Ports
- -18X Series Top End Kit
- Standard Exhaust Port
- 245cc Intake Ports
- 68cc Combustion Chambers
- 2.140'' Intake / 1.600'' Exhaust Valves
- 1.550'' Dia. Springs - 240# Seat Pressure
- Titanium Retainers
- Angle Plug
- Assembled, 2/pkg.
Small Block Chevy Top End Kits Include: - Complete Cylinder Heads
- HV 1800 Intake Manifold (4150 Series)
- Tall Cast Aluminum Valve Covers with Studs and Nuts
- Valve Cover, Intake, Exhaust, Carburetor and Head Gaskets
- Head Bolts with Washers
- Intake Bolts with Washers
- Spark Plugs
- Brodix HatCylinder Head Specifications
- Intake Port Volume: 245cc
- Combustion Chamber Volume: 68cc
- Valves: 2.140' dia. x 5.290' o.a.l. Intake / 1.600' dia. x 5.300' o.a.l. Exhaust ( 11/32' Stem Diameter )
- Valve Springs: 1.550' Diameter - Open Pressure: 550 lbs.; Closed Pressure: 240 lbs.; Installed Height: 1.950'; Max Lift: .700'
- Spring Retainers: 1.550' 10° Titanium
- Rocker Studs: 7/16'
- Guide Plates: 5/16'
- Valve Seals: 11/32'
- Spark Plug Configuration: AngledFacts and Related Components
- Torque Heads: 70 ft-lb.
- Torque Rocker Studs: 40-45 ft-lb.
- Intake Gasket: Brodix p/n 158-MG1800, Cometic p/n 245-C3250
- Head Gasket: Fel-Pro p/n 375-1003 (350ci) / 375-1004 (400ci) or Cometic p/n 245-C5399 (350ci) / 245-C5403 (400ci)
- Exhaust Gasket: Fel-Pro p/n 375-1406, Cometic p/n 245-C5415 (Standard Port)
- Head Studs: ARP p/n 070-234-4727 (12-point with 3/8' center studs)
- Spark Plug Specs: 14mm Thread, .750' (3/4') Reach, Gasket Seat
- Valve Angle: 18°
- Angle Milling: .0065' per cc
- Flat Milling: .0055' per cc
- Pushrod Slots: 40/60
- Stud Girdle: 40/60 Brodix p/n 158-BR6440
- Rocker Arms: Standard 7/16 Roller Rockers, Shaft System with 40/60 Spacing
- Lifters: Standard
- Pistons: Special 18°
- Pushrods: Special Length
- Intake Face Angle: 10° Standard
- Exhaust Pattern: Standard and Stahl
- Valve Centerline: 40/60
- Spring Pockets: 1.550' Out of the Box, May be cut to 1.625' - No larger or deeper
- Accessory Bolt Holes are Drilled
- Recommended Intake Manifold: Brodix HV 1800 (p/n 158-HV1800) / HV 1801 (p/n 158-HV1801)
Part TypeTop End Kit
BrandBRODIX
Package Height16.5
Package Width23.25
Package Length24.25
Weight122.0 PG
Part CategoryPerformance Parts
Vendor Part Number9991009
Package Qty1
Package TypeEA
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