RFD 18 Degree "Monster"

The "Monster 18" is the most bad azz 18º head available for big inch small blocks. Designed from the ground up as a large cubic inch head with matching cast 4 intakes available the Monster is capable of 900+ hp with a single 4 And well over 1,000 hp with Nitrous. Out flows other 18* heads in this price range and makes more power.

Versions for Drag racing, Circle Track, Dirt late Model and Road Racing available.


Name: RFD 18 Degree "Monster"


Platform: Small Block Chevy

Price: $4150

Price is for complete set

Cylinder Head Specifics

Bore: 4.125
Intake Valves: 2.2"
Exhaust Valves: 1.6"
Flow: 385

Other Specs

> Fully CnC Ported- Every Chamber & Port !
> A 356 T-6 Aluminum
> Ductile Iron Valve Seats
> Bronze Alloy Valve Guides
> Standard 18º Intake Manifolds
> Requires Shaft Rockers
> 56cc Chambers
> Super thick decks
> Several port sizes available
> 250,268,284
> 2.18" Intake and 1.6" Exhaust
> 1.65" Double roller valve springs
> 10º Titanium Retainers

Upgrades Available

Total: 4150.00


  • CNC Ported Cylinder Heads

  • Welding, Repair & Fabrication

  • Custom CNC Machining

  • Cylinder Head Development


Monday-Friday 10am-6pm EST

545 South Birdneck Road
Suite 109 Virginia Beach, VA 23451

Phone- (757)222-9717

Fax- (757)222-9890

E-Mail- info@raceflowdevelopment.com