Dragon Slayer DS 365 Big Block Chevy Cylinder Head

Name: Dragon Slayer DS 365 Big Block Chevy Cylinder Head
Brand: BRODIX
SKU: 158-2321021
Price: 1410.82 USD
Availability: InStock

^$1,410⁸²

Ships on 09/21/2026

Lowest Price Guarantee

Dragon Slayer DS 365 Series Cylinder Heads

365cc Intake Port Volume

1.550" Diameter Valve Springs - 610# Open, 255# Closed Spring Pressure

Dragon Slayer DS 365 Series Cylinder Head

365cc Rectangle Intake Ports

110cc Combustion Chambers

2.300" Intake / 1.880" Exhaust Valves

1.550" Dia. Springs - 255# Seat Pressure

Steel Retainers

Assembled, 1/pkg.

Cylinder Head Specifications

Intake Port Volume: 365cc - Rectangle Port
Combustion Chamber Volume: 110cc
Stainless Steel Valves: 2.300" dia. x 5.468" o.a.l. Intake / 1.880" dia. x 5.394" o.a.l. Exhaust ( 11/32" Stem Diameter )
Valve Springs: Double Springs; 1.550' Diameter - Open Pressure: 610 lbs.; Closed Pressure: 255 lbs.; Installed Height: 1.950"; Max Lift: .700"
Spring Retainers: 1.550" 10° Steel
Valve Seals: 11/32"
Spark Plug Configuration: Angled

Facts and Related Components

Torque Heads: 70 ft-lb.
Torque Rocker Studs: 40-45 ft-lb.
Intake Gasket: Brodix p/n 158-MG2001, Cometic p/n 245-C5428, Fel-Pro p/n 375-1252-3
Head Gasket: 4.310' Bore - Fel-Pro p/n 375-1027, Cometic p/n 245-C5432; 4.540' Bore - Fel-Pro p/n 375-1017, Cometic p/n 245-C5433
Exhaust Gasket: Fel-Pro p/n 375-1411 or Cometic p/n 245-C5429
Head Bolts: ARP p/n 070-135-3606, Manley p/n 660-42192 Bolts / 42102 Washers
Head Studs: ARP p/n 070-235-4702 (12-point)
Spark Plug Specs: 14mm Thread, .750' (3/4') Reach, Gasket Seat
Valve Angle: 26° and 4° Intake, 17° and 4° Exhaust
Angle Milling: .0066' per cc
Flat Milling: .0050' per cc
Pushrod Slots: Standard
Pushrods: Check pushrod clearance with head installed on the engine block before final assembly
Stud Girdle: Standard BB-Chevy, Brodix p/n 158-1230
Rocker Arms: Standard BB-Chevy
Lifters: Standard
Pistons: Standard BB-Chevy
Valve Centerline: Standard BB-Chevy
Exhaust Pattern: Raised .600"
Spring Pockets: May not be cut any larger or deeper than 1.625'
Accessory Bolt Holes are Drilled
Recommended Intake Manifold: Brodix BM 2000 (p/n 158-BM2000) / HV 2001 (p/n 158-HV2001)

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

Proven Competition Head That Works with
Most Standard Big-Block Chevy Components!
26°/4° Intake & 17°/4° Exhaust Valve Angles

The new DS 320 and DS 365 Big Block Chevrolet compatible cylinder heads are the latest addition to the Dragon Slayer series. These heads require no porting, making them the most powerful heads in their class. The DS 320 series has a 320cc intake port and flows over 370 cfm and the DS 365 series flows over 392 cfm with only the bowls blended and the intake ports matched to the gasket. Available with a 110cc, 115cc or 119cc combustion chamber.

These cylinder heads accept all standard pistons, intake manifolds, and rocker arms. The exhaust ports are raised .600'' higher than stock. Valve cover rails are now raised to assure no oil leakage. 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 hardened valve seats installed for unleaded fuel. Sold Individually, 1/pkg.