BP -18C Series Cylinder Heads Spread Exhaust Port

Name: BP -18C Series Cylinder Heads Spread Exhaust Port
Brand: BRODIX
SKU: 158-1188004
Price: 3395.23 USD
Availability: InStock

^$3,395²³

Ships on 09/22/2026

Lowest Price Guarantee

BP -18C Series Cylinder Heads

56cc Combustion Chambers

Spread Exhaust Ports

100% CNC Ported

Spread Exhaust Port
254cc Intake Ports
56cc Combustion Chambers
2.180'' Intake / 1.625'' Exhaust Valve Sizes
Angle Plug
Bare, 2/pkg.

This head is sold as an unassembled bare casting. It is finished machined and includes valve guides and valve seats installed. This head does NOT include studs, valves, springs retainers or locks.
Cylinder Head Specifications
Intake Port Volume: 254cc (CNC Ported)
Combustion Chamber Volume: 56cc
Valve Sizes: 2.180' Intake / 1.625' Exhaust ( 11/32' Stem Diameter )
Spark Plug Configuration: Angled
Facts and Related Components
Torque Heads: 70 ft-lb.
Torque Rocker Studs: 40-45 ft-lb.
Intake Gasket: Modified Fel-Pro p/n 375-1282
Head Gasket: Fel-Pro p/n 375-1003 (350ci) / 375-1004 (400ci) or Cometic p/n 245-C5399 (350ci) / 245-C5403 (400ci)
Exhaust Gasket: Brodix p/n 158-MG52464, Cometic p/n 245-C5424 (Spread 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: 58/107
Stud Girdle: N/A
Rocker Arms: Shaft System with 58/107 Spacing (Check heads for intake offset) - T&D 2229, Jesel KPS 15409
Lifters: .180' Offset
Pistons: Special 18°
Pushrods: Special Length
Intake Face Angle: 5°
Exhaust Pattern: Stahl Only
Valve Centerline: 58/107
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 1813 (p/n 158-HV1813) / HV 1814 (p/n 158-HV1814)

Emissions Note:

This part is only legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles or on vehicles used solely for the purposes of closed competition racing.

CLICK THIS LINK FOR IMPORTANT CARB & EPA EMISSIONS INFORMATION ABOUT THIS PART

Cylinder Heads for Serious Race Applications!
18° Intake & Exhaust Valve Angles

This -18C series cylinder head has an 18-degree valve angle that works well on dirt late model or serious drag racing applications. This head has special valve centerlines and dowel location requiring special components. Interlocking valve seats are installed along with replaceable phosphorous bronze guides. The combustion chambers may be angle machined down to the mid 40cc range without weakening the deck surface. The -18C has two exhaust bolt patterns available and a 5° intake face requiring a special intake manifold and components.

Every casting is poured from A-356 virgin aluminum and tested before Brodix utilizes their in-house processes such as finish machining and heat treating to assure that you receive the best products for your hard-earned money. The industry standard has been taken to the next level with modernized CNC porting. Other features include a thick deck surface that is compatible with nitrous, drilled and tapped holes on the ends for standard drive accessories, phosphorous bronze valve guides and interlocking valve seats. Sold in Pairs. !