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- WP LM -12 Series Cylinder Heads
- 300cc Intake Ports
- 49cc Combustion Chambers
- 2.180'' Intake (Steel) / 1.625'' Exhaust (Steel) Valves
- 1.550'' Dia. Springs - 240# Seat Pressure
- Titanium Retainers
- Angle Plug
- Assembled, 2/pkg.
Cylinder Head Specifications - Intake Port Volume: 300cc
- Combustion Chamber Volume: 49cc
- Valves: 2.180' dia. x 5.740' o.a.l. Intake (Stainless Steel) / 1.625' dia. x 5.740' o.a.l. Exhaust (Stainless Steel) ( 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: N/A - Shaft System Required
- Guide Plates: N/A
- 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-MG1215
- 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 375-1407
- Head Studs: Brodix SK HSSB 13 (Aluminum Block)
- Spark Plug Specs: 14mm Thread, .750' (3/4') Reach, Gasket Seat
- Valve Angle: 12°
- Angle Milling: .0065' per cc
- Flat Milling: .0055' per cc
- Pushrod Slots: 85/134
- Stud Girdle: N/A
- Rocker Arms: Shaft System with 85/134 Spacing (Check heads for intake offset) - T&D 22076
- Lifters: .180' Offset
- Pistons: Special 12°
- Pushrods: Special Length
- Intake Face Angle: 5°
- Exhaust Pattern: Standard and Stahl
- Valve Centerline: 85/134
- 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: Edelbrock Victor 18° 2.9 Intake Manifold p/n 350-2955
- Valley Plate: GM 24502652
Ported Head Flows 387 CFM!
12° Intake & Exhaust Valve Angles
The 100% CNC ported WP LM -12 is the latest in dirt late model technology. It features a 12-degree valve angle, 85/134 valve spacing, and newly designed intake and exhaust ports. The intake port on this head flows 387 cfm with a 2.180'' intake valve. The exhaust port flows 270 cfm with a 1.625'' exhaust valve. The 100% CNC ported offering from Brodix is destined to become the industry standard. This head has special valve centerlines and dowel location requiring special components. The LM -12 series has two exhaust bolt patterns available and a 5° intake face requiring a special intake manifold and components (compatible with 18° intakes/headers).
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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. 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. !
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